added more fields

.gitignore

@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

.idea/AndroidProjectSystem.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AndroidProjectSystem">
+    <option name="providerId" value="com.android.tools.idea.GradleProjectSystem" />
+  </component>
+</project>

.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="21" />
+  </component>
+</project>

.idea/deploymentTargetSelector.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetSelector">
+    <selectionStates>
+      <SelectionState runConfigName="app">
+        <option name="selectionMode" value="DROPDOWN" />
+      </SelectionState>
+    </selectionStates>
+  </component>
+</project>

.idea/gradle.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="CHOOSE_PER_TEST" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/migrations.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectMigrations">
+    <option name="MigrateToGradleLocalJavaHome">
+      <set>
+        <option value="$PROJECT_DIR$" />
+      </set>
+    </option>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,9 @@
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="jbr-21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>

.idea/runConfigurations.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.intellij.execution.junit.AbstractAllInDirectoryConfigurationProducer" />
+        <option value="com.intellij.execution.junit.AllInPackageConfigurationProducer" />
+        <option value="com.intellij.execution.junit.PatternConfigurationProducer" />
+        <option value="com.intellij.execution.junit.TestInClassConfigurationProducer" />
+        <option value="com.intellij.execution.junit.UniqueIdConfigurationProducer" />
+        <option value="com.intellij.execution.junit.testDiscovery.JUnitTestDiscoveryConfigurationProducer" />
+        <option value="org.jetbrains.kotlin.idea.junit.KotlinJUnitRunConfigurationProducer" />
+        <option value="org.jetbrains.kotlin.idea.junit.KotlinPatternConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

Jenkinsfile

@@ -7,10 +7,8 @@ pipeline {
         ANDROID_SDK_ROOT = '/opt/android-sdk'
         PATH = "/usr/lib/jvm/java-21-openjdk-amd64/bin:/opt/android-sdk/cmdline-tools/latest/bin:/opt/android-sdk/platform-tools:${env.PATH}"
 
-        TAIGA_PROJECT_ID = '2'
-        TAIGA_URL = 'https://taiga.grigowashere.ru'
         GITEA_OWNER = 'Grigo'
-        GITEA_REPO = 'TestingAndroidBuild' // Замените на нужный репозиторий
+        GITEA_REPO = 'LoraMapTester' // Замените на нужный репозиторий
         GITEA_URL = 'https://git.grigowashere.ru' // Базовый URL Gitea
         GITEA_API_URL = "${GITEA_URL}/api/v1"
         GITEA_TOKEN_CREDENTIALS_ID = 'Gitea_Credentials' // ID ваших креденшлов для Gitea в Jenkins
@@ -40,7 +38,11 @@ pipeline {
                     writeFile file: 'gitea-release.sh', text: '''
 #!/bin/bash
 
-apkPath="build/outputs/apk/debug/app-debug.apk"
+apkPath=$(find . -path '*/build/outputs/apk/debug/*.apk' -type f | head -1)
+if [ -z "$apkPath" ]; then
+  echo "APK not found under */build/outputs/apk/debug/"
+  exit 1
+fi
 headers="Authorization: token $GITEA_TOKEN"
 
 # Создаем релиз на Gitea
@@ -80,98 +82,4 @@ fi
             }
         }
     }
-
-    post {
-        always {
-            script {
-                def result = currentBuild.currentResult ?: 'UNKNOWN'
-
-                withCredentials([string(credentialsId: 'TAIGA_TOKEN', variable: 'TAIGA_TOKEN')]) {
-                    sh(returnStatus: true, script: """
-                        set +e
-
-                        REF=\$(git log -1 --pretty=%B | grep -oE 'TG-[0-9]+' | head -1 | cut -d- -f2 || true)
-
-                        if [ -z "\$REF" ]; then
-                          echo "No TG-* reference found"
-                          exit 0
-                        fi
-
-                        export REF
-                        export BUILD_RESULT="${result}"
-
-                        python3 - <<'PY'
-import json
-import os
-import urllib.request
-
-taiga_url = os.environ["TAIGA_URL"]
-project_id = os.environ["TAIGA_PROJECT_ID"]
-token = os.environ["TAIGA_TOKEN"]
-ref = os.environ["REF"]
-
-headers = {
-    "Authorization": f"Bearer {token}",
-    "Content-Type": "application/json",
-}
-
-def get_json(path):
-    url = f"{taiga_url}{path}"
-    req = urllib.request.Request(url, headers=headers)
-    try:
-        with urllib.request.urlopen(req) as r:
-            return json.loads(r.read().decode("utf-8"))
-    except Exception:
-        return None
-
-targets = [
-    ("userstories", "User Story"),
-    ("issues", "Issue"),
-    ("tasks", "Task"),
-]
-
-found = None
-
-for endpoint, label in targets:
-    data = get_json(f"/api/v1/{endpoint}/by_ref?project={project_id}&ref={ref}")
-    if data and "id" in data:
-        found = (endpoint, label, data)
-        break
-
-if not found:
-    print(f"Taiga TG-{ref} not found")
-    raise SystemExit(0)
-
-endpoint, label, data = found
-
-comment = (
-    f"Jenkins Android build #{os.environ['BUILD_NUMBER']}: {os.environ['BUILD_RESULT']}\\n"
-    f"{os.environ['BUILD_URL']}"
-)
-
-payload = json.dumps({
-    "comment": comment,
-    "version": data["version"],
-}).encode("utf-8")
-
-url = f"{taiga_url}/api/v1/{endpoint}/{data['id']}"
-req = urllib.request.Request(
-    url,
-    data=payload,
-    headers=headers,
-    method="PATCH",
-)
-
-try:
-    with urllib.request.urlopen(req) as r:
-        print(f"Commented Taiga TG-{ref} ({label}), HTTP {r.status}")
-except Exception as e:
-    print(f"Taiga comment warning: {e}")
-    raise SystemExit(0)
-PY
-                    """.stripIndent())
-                }
-            }
-        }
-    }
 }

README.md

@@ -0,0 +1,24 @@
+# LoraTester
+
+Android-клиент и Python-сервер для мониторинга LoRa приёмопередатчика (telnet → парсинг кадров), GPS-позиций, карты и чата между устройствами.
+
+## Компоненты
+
+- **Android** (`app/`) — telnet на `127.0.0.1:2727`, AT-команды (AT+H, AT+TX, …), отправка телеметрии на сервер, карта OSMDroid, чат, настройки.
+- **Server** (`server/`) — Flask (основной) + FastAPI, веб-карта Leaflet, REST API. См. [server/README.md](server/README.md).
+
+## Быстрый старт
+
+1. Запустите сервер: `cd server && pip install -r requirements.txt && python flask_app.py`
+2. Соберите APK в Android Studio или `./gradlew assembleDebug`
+3. В приложении: Настройки → URL `https://lora.grigowashere.ru` (или свой сервер), включите telnet при наличии моста COM→telnet
+
+## Тесты
+
+```bash
+./gradlew test
+```
+
+Симуляция телнет-кадра: вкладка **Статистика** → «Симуляция телнет-кадра».
+
+AT-команды: вкладка **AT** — быстрые кнопки и произвольная строка (добавляются префикс `AT` и `\r\n`). Нужен включённый telnet в **Настройках**.

app/.gitignore

@@ -0,0 +1 @@
+/build

app/build.gradle.kts

@@ -0,0 +1,57 @@
+plugins {
+    alias(libs.plugins.android.application)
+}
+
+android {
+    namespace = "com.grigowashere.loratester"
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "com.grigowashere.loratester"
+        minSdk = 30
+        targetSdk = 35
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+}
+
+dependencies {
+
+    implementation(libs.appcompat)
+    implementation(libs.material)
+    implementation(libs.activity)
+    implementation(libs.constraintlayout)
+    implementation(libs.okhttp)
+    implementation(libs.gson)
+    implementation(libs.play.services.location)
+    implementation(libs.mapsforge.core)
+    implementation(libs.mapsforge.map)
+    implementation(libs.mapsforge.map.android)
+    implementation(libs.mapsforge.map.reader)
+    implementation(libs.mapsforge.themes)
+    implementation(libs.viewpager2)
+    implementation(libs.fragment)
+    implementation(libs.recyclerview)
+    testImplementation(libs.junit)
+    testImplementation(libs.okhttp)
+    testImplementation(libs.gson)
+    testImplementation(libs.mockwebserver)
+    androidTestImplementation(libs.ext.junit)
+    androidTestImplementation(libs.espresso.core)
+}

app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/grigowashere/loratester/ExampleInstrumentedTest.java

@@ -0,0 +1,26 @@
+package com.grigowashere.loratester;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.grigowashere.loratester", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_LOCATION" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.VIBRATE" />
+
+    <application
+        android:name=".LoraApp"
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.LoraTester"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:windowSoftInputMode="adjustResize">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <service
+            android:name=".LoraForegroundService"
+            android:exported="false"
+            android:foregroundServiceType="location|dataSync" />
+    </application>
+
+</manifest>

app/src/main/java/com/grigowashere/loratester/CommandPoller.java

@@ -0,0 +1,293 @@
+package com.grigowashere.loratester;
+
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import com.grigowashere.loratester.api.DeviceCommand;
+import com.grigowashere.loratester.api.PairedTrackSession;
+import com.grigowashere.loratester.api.ServerApi;
+import com.grigowashere.loratester.telnet.AtCommands;
+import com.grigowashere.loratester.telnet.TelnetClient;
+import com.grigowashere.loratester.track.TrackRecorder;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+public class CommandPoller {
+
+    private static final String TAG = "CommandPoller";
+    private static final long COMMAND_POLL_MS = 2000;
+    private static final long PAIRED_POLL_MS = 1500;
+
+    private final ServerApi serverApi;
+    private final String deviceId;
+    private final TelemetryUploader uploader;
+    private final TrackRecorder trackRecorder;
+    private final PeerStatsCache peerStatsCache;
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
+    private final ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor(r -> {
+        Thread t = new Thread(r, "CommandPoller");
+        t.setDaemon(true);
+        return t;
+    });
+    private final Handler mainHandler = new Handler(Looper.getMainLooper());
+    private final AtomicBoolean running = new AtomicBoolean(false);
+
+    private volatile long pendingAckSessionId = -1;
+    private volatile long startedSessionId = -1;
+
+    public CommandPoller(
+            ServerApi serverApi,
+            String deviceId,
+            TelemetryUploader uploader,
+            TrackRecorder trackRecorder,
+            PeerStatsCache peerStatsCache
+    ) {
+        this.serverApi = serverApi;
+        this.deviceId = deviceId;
+        this.uploader = uploader;
+        this.trackRecorder = trackRecorder;
+        this.peerStatsCache = peerStatsCache;
+        trackRecorder.setPairedListener(new TrackRecorder.Listener() {
+            @Override
+            public void onStateChanged(boolean recording, int pointCount, long trackId) {
+                if (recording && trackId > 0 && pendingAckSessionId > 0) {
+                    long sid = pendingAckSessionId;
+                    pendingAckSessionId = -1;
+                    executor.execute(() -> ackSession(sid, trackId));
+                }
+            }
+
+            @Override
+            public void onError(String message) {
+                Log.w(TAG, "track: " + message);
+            }
+        });
+    }
+
+    public PeerStatsCache getPeerStatsCache() {
+        return peerStatsCache;
+    }
+
+    public void start() {
+        if (!running.compareAndSet(false, true)) {
+            return;
+        }
+        scheduler.scheduleWithFixedDelay(
+                this::pollCommandsSafe, 0, COMMAND_POLL_MS, TimeUnit.MILLISECONDS);
+        scheduler.scheduleWithFixedDelay(
+                this::pollPairedSafe, 0, PAIRED_POLL_MS, TimeUnit.MILLISECONDS);
+    }
+
+    public void stop() {
+        running.set(false);
+    }
+
+    private void pollCommandsSafe() {
+        if (!running.get()) {
+            return;
+        }
+        pollCommands();
+    }
+
+    private void pollPairedSafe() {
+        if (!running.get()) {
+            return;
+        }
+        pollPairedSession();
+    }
+
+    private void pollCommands() {
+        try {
+            List<DeviceCommand> cmds = serverApi.pollPendingCommands(deviceId);
+            for (DeviceCommand cmd : cmds) {
+                execute(cmd);
+            }
+        } catch (Exception e) {
+            Log.w(TAG, "command poll failed", e);
+        }
+    }
+
+    private void execute(DeviceCommand cmd) {
+        if (cmd == null || cmd.kind == null) {
+            return;
+        }
+        switch (cmd.kind) {
+            case "at" -> {
+                List<String> lines = extractLines(cmd.payload);
+                if (lines != null && !lines.isEmpty()) {
+                    uploader.sendMacroSequence(lines, r ->
+                            Log.i(TAG, "remote macro " + lines + " -> " + r));
+                } else {
+                    String line = cmd.payload != null && cmd.payload.get("line") != null
+                            ? String.valueOf(cmd.payload.get("line")) : null;
+                    if (line != null) {
+                        uploader.sendAtCommand(line, r ->
+                                Log.i(TAG, "remote AT " + line + " -> " + r));
+                    }
+                }
+            }
+            case "mode" -> {
+                String role = cmd.payload != null && cmd.payload.get("role") != null
+                        ? String.valueOf(cmd.payload.get("role")) : null;
+                if ("TX".equalsIgnoreCase(role)) {
+                    uploader.sendAtCommand(AtCommands.TRANSMIT, r -> {});
+                } else if ("RX".equalsIgnoreCase(role)) {
+                    uploader.sendAtCommand(AtCommands.RECEIVE, r -> {});
+                }
+            }
+            case "stats_push" -> peerStatsCache.updateFromPayload(cmd.payload);
+            default -> Log.w(TAG, "unknown kind " + cmd.kind);
+        }
+    }
+
+    private void pollPairedSession() {
+        try {
+            Map<String, Object> resp = serverApi.getActivePairedTrack();
+            Object sessionObj = resp.get("session");
+            if (!(sessionObj instanceof Map)) {
+                return;
+            }
+            @SuppressWarnings("unchecked")
+            Map<String, Object> m = (Map<String, Object>) sessionObj;
+            PairedTrackSession session = mapSession(m);
+            if (session == null) {
+                return;
+            }
+            boolean inSession = deviceId.equals(session.device_a)
+                    || deviceId.equals(session.device_b);
+            if (!inSession) {
+                return;
+            }
+            if (!session.ready || trackRecorder.isRecording()) {
+                return;
+            }
+            if (startedSessionId == session.id) {
+                return;
+            }
+            Long myTrack = deviceId.equals(session.device_a)
+                    ? session.track_id_a : session.track_id_b;
+            if (myTrack != null && myTrack > 0) {
+                startedSessionId = session.id;
+                return;
+            }
+            startedSessionId = session.id;
+            pendingAckSessionId = session.id;
+            trackRecorder.start();
+        } catch (Exception e) {
+            Log.w(TAG, "paired poll failed", e);
+        }
+    }
+
+    private void ackSession(long sessionId, long trackId) {
+        try {
+            serverApi.ackPairedTrack(sessionId, deviceId, trackId);
+            Log.i(TAG, "paired ack session=" + sessionId + " track=" + trackId);
+        } catch (Exception e) {
+            Log.e(TAG, "paired ack failed", e);
+            pendingAckSessionId = sessionId;
+        }
+    }
+
+    private static PairedTrackSession mapSession(Map<String, Object> m) {
+        if (m == null) {
+            return null;
+        }
+        PairedTrackSession s = new PairedTrackSession();
+        Object id = m.get("id");
+        if (id instanceof Number) {
+            s.id = ((Number) id).longValue();
+        }
+        s.device_a = str(m.get("device_a"));
+        s.device_b = str(m.get("device_b"));
+        s.initiator = str(m.get("initiator"));
+        s.status = str(m.get("status"));
+        s.start_at = num(m.get("start_at"));
+        s.created_at = num(m.get("created_at"));
+        s.server_time = num(m.get("server_time"));
+        Object ready = m.get("ready");
+        s.ready = ready instanceof Boolean && (Boolean) ready;
+        s.track_id_a = longOrNull(m.get("track_id_a"));
+        s.track_id_b = longOrNull(m.get("track_id_b"));
+        return s;
+    }
+
+    private static String str(Object o) {
+        return o != null ? String.valueOf(o) : null;
+    }
+
+    private static double num(Object o) {
+        return o instanceof Number ? ((Number) o).doubleValue() : 0;
+    }
+
+    private static Long longOrNull(Object o) {
+        return o instanceof Number ? ((Number) o).longValue() : null;
+    }
+
+    @Nullable
+    private static List<String> extractLines(Map<String, Object> payload) {
+        if (payload == null) {
+            return null;
+        }
+        Object raw = payload.get("lines");
+        if (!(raw instanceof List<?> list) || list.isEmpty()) {
+            return null;
+        }
+        List<String> lines = new java.util.ArrayList<>();
+        for (Object item : list) {
+            if (item != null) {
+                String line = String.valueOf(item).trim();
+                if (!line.isEmpty()) {
+                    lines.add(line);
+                }
+            }
+        }
+        return lines.isEmpty() ? null : lines;
+    }
+
+    public void postMacroToPeer(String peerId, List<String> lines) {
+        Map<String, Object> payload = new HashMap<>();
+        payload.put("lines", lines);
+        postCommandToPeer(peerId, "at", payload);
+    }
+
+    public void postCommandToPeer(String peerId, String kind, Map<String, Object> payload) {
+        executor.execute(() -> {
+            try {
+                serverApi.postCommand(deviceId, peerId, kind, payload);
+            } catch (Exception e) {
+                Log.e(TAG, "post command failed", e);
+            }
+        });
+    }
+
+    public void startPairedTrack(Runnable onDone, java.util.function.Consumer<String> onError) {
+        executor.execute(() -> {
+            try {
+                Map<String, Object> body = new HashMap<>();
+                body.put("device_id", deviceId);
+                serverApi.startPairedTrack(body);
+                startedSessionId = -1;
+                pendingAckSessionId = -1;
+                if (onDone != null) {
+                    mainHandler.post(onDone);
+                }
+            } catch (Exception e) {
+                Log.e(TAG, "start paired failed", e);
+                if (onError != null) {
+                    mainHandler.post(() -> onError.accept(
+                            e.getMessage() != null ? e.getMessage() : "error"));
+                }
+            }
+        });
+    }
+}

app/src/main/java/com/grigowashere/loratester/LoraApp.java

@@ -0,0 +1,120 @@
+package com.grigowashere.loratester;
+
+import android.app.Application;
+
+import com.grigowashere.loratester.api.ServerApi;
+import com.grigowashere.loratester.location.LocationTracker;
+import com.grigowashere.loratester.net.NetworkMonitor;
+import com.grigowashere.loratester.track.TrackRecorder;
+
+import org.mapsforge.map.android.graphics.AndroidGraphicFactory;
+
+public class LoraApp extends Application {
+
+    private TelemetryUploader telemetryUploader;
+    private SettingsRepository settingsRepository;
+    private TrackRecorder trackRecorder;
+    private NetworkMonitor networkMonitor;
+    private PeerStatsCache peerStatsCache;
+    private CommandPoller commandPoller;
+    private LocationTracker locationTracker;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        AndroidGraphicFactory.createInstance(this);
+        settingsRepository = new SettingsRepository(this);
+        networkMonitor = new NetworkMonitor(this);
+        networkMonitor.start();
+        telemetryUploader = new TelemetryUploader(this, settingsRepository, networkMonitor);
+        peerStatsCache = new PeerStatsCache();
+        ServerApi serverApi = new ServerApi(settingsRepository.getServerUrl());
+        String deviceId = settingsRepository.getOrCreateDeviceId();
+        trackRecorder = new TrackRecorder(
+                serverApi,
+                telemetryUploader,
+                deviceId,
+                networkMonitor
+        );
+        commandPoller = new CommandPoller(
+                serverApi,
+                deviceId,
+                telemetryUploader,
+                trackRecorder,
+                peerStatsCache
+        );
+        commandPoller.start();
+        telemetryUploader.registerPresence();
+        if (networkMonitor != null) {
+            networkMonitor.addListener(online -> {
+                if (online) {
+                    telemetryUploader.registerPresence();
+                }
+            });
+        }
+    }
+
+    public NetworkMonitor getNetworkMonitor() {
+        return networkMonitor;
+    }
+
+    public TelemetryUploader getTelemetryUploader() {
+        return telemetryUploader;
+    }
+
+    public SettingsRepository getSettingsRepository() {
+        return settingsRepository;
+    }
+
+    public TrackRecorder getTrackRecorder() {
+        return trackRecorder;
+    }
+
+    public PeerStatsCache getPeerStatsCache() {
+        return peerStatsCache;
+    }
+
+    public CommandPoller getCommandPoller() {
+        return commandPoller;
+    }
+
+    public synchronized void startLocationUpdates() {
+        if (locationTracker == null) {
+            locationTracker = new LocationTracker(this, (lat, lon, alt) -> {
+                telemetryUploader.updateLocation(lat, lon);
+                trackRecorder.updateLocation(lat, lon, alt);
+            });
+        }
+        locationTracker.start();
+    }
+
+    public synchronized void stopLocationUpdates() {
+        if (locationTracker != null) {
+            locationTracker.stop();
+        }
+    }
+
+    public void refreshTrackRecorder() {
+        if (commandPoller != null) {
+            commandPoller.stop();
+        }
+        if (peerStatsCache == null) {
+            peerStatsCache = new PeerStatsCache();
+        }
+        ServerApi serverApi = new ServerApi(settingsRepository.getServerUrl());
+        trackRecorder = new TrackRecorder(
+                serverApi,
+                telemetryUploader,
+                settingsRepository.getOrCreateDeviceId(),
+                networkMonitor
+        );
+        commandPoller = new CommandPoller(
+                serverApi,
+                settingsRepository.getOrCreateDeviceId(),
+                telemetryUploader,
+                trackRecorder,
+                peerStatsCache
+        );
+        commandPoller.start();
+    }
+}

app/src/main/java/com/grigowashere/loratester/LoraForegroundService.java

@@ -0,0 +1,178 @@
+package com.grigowashere.loratester;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ServiceInfo;
+import android.os.Build;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.PowerManager;
+
+import androidx.annotation.Nullable;
+import androidx.core.app.NotificationCompat;
+
+import com.grigowashere.loratester.track.TrackRecorder;
+
+public class LoraForegroundService extends Service {
+
+    private static final String CHANNEL_ID = "lora_background";
+    private static final int NOTIFICATION_ID = 1;
+
+    private final Handler handler = new Handler(Looper.getMainLooper());
+    private PowerManager.WakeLock wakeLock;
+    private LoraApp app;
+
+    private final Runnable notificationTicker = new Runnable() {
+        @Override
+        public void run() {
+            updateNotification();
+            handler.postDelayed(this, 5000L);
+        }
+    };
+
+    public static void ensureRunning(Context context) {
+        Context appContext = context.getApplicationContext();
+        Intent intent = new Intent(appContext, LoraForegroundService.class);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            appContext.startForegroundService(intent);
+        } else {
+            appContext.startService(intent);
+        }
+    }
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        app = (LoraApp) getApplication();
+        createNotificationChannel();
+        acquireWakeLock();
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        Notification notification = buildNotification();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            startForeground(
+                    NOTIFICATION_ID,
+                    notification,
+                    ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION
+                            | ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC
+            );
+        } else {
+            startForeground(NOTIFICATION_ID, notification);
+        }
+        app.startLocationUpdates();
+        handler.removeCallbacks(notificationTicker);
+        handler.post(notificationTicker);
+        return START_STICKY;
+    }
+
+    @Override
+    public void onDestroy() {
+        handler.removeCallbacks(notificationTicker);
+        releaseWakeLock();
+        app.stopLocationUpdates();
+        super.onDestroy();
+    }
+
+    @Override
+    public void onTaskRemoved(Intent rootIntent) {
+        TelemetryUploader uploader = app.getTelemetryUploader();
+        if (uploader != null) {
+            uploader.stopTelnet();
+        }
+        stopForeground(STOP_FOREGROUND_REMOVE);
+        stopSelf();
+        super.onTaskRemoved(rootIntent);
+    }
+
+    @Nullable
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    private void acquireWakeLock() {
+        PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
+        if (pm == null) {
+            return;
+        }
+        wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "LoraTester::Background");
+        wakeLock.setReferenceCounted(false);
+        wakeLock.acquire();
+    }
+
+    private void releaseWakeLock() {
+        if (wakeLock != null && wakeLock.isHeld()) {
+            wakeLock.release();
+        }
+        wakeLock = null;
+    }
+
+    private void createNotificationChannel() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
+            return;
+        }
+        NotificationChannel channel = new NotificationChannel(
+                CHANNEL_ID,
+                getString(R.string.notification_channel_name),
+                NotificationManager.IMPORTANCE_LOW
+        );
+        channel.setDescription(getString(R.string.notification_channel_desc));
+        NotificationManager nm = getSystemService(NotificationManager.class);
+        if (nm != null) {
+            nm.createNotificationChannel(channel);
+        }
+    }
+
+    private Notification buildNotification() {
+        Intent open = new Intent(this, MainActivity.class);
+        open.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
+        PendingIntent pending = PendingIntent.getActivity(
+                this,
+                0,
+                open,
+                PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE
+        );
+
+        TelemetryUploader uploader = app.getTelemetryUploader();
+        TrackRecorder recorder = app.getTrackRecorder();
+        SettingsRepository settings = app.getSettingsRepository();
+
+        boolean telnetOn = settings.isTelnetEnabled();
+        boolean telnetConnected = uploader != null && uploader.isTelnetConnected();
+        boolean recording = recorder != null && recorder.isRecording();
+        int points = recorder != null ? recorder.getPointCount() : 0;
+
+        String telnetLine = telnetOn
+                ? getString(telnetConnected ? R.string.telnet_connected : R.string.telnet_disconnected)
+                : getString(R.string.telnet_disabled_short);
+        String trackLine = recording
+                ? getString(R.string.notification_track_recording, points)
+                : getString(R.string.notification_track_idle);
+
+        return new NotificationCompat.Builder(this, CHANNEL_ID)
+                .setSmallIcon(R.drawable.ic_stat_service)
+                .setContentTitle(getString(R.string.notification_title))
+                .setContentText(telnetLine + " · " + trackLine)
+                .setSubText(getString(R.string.notification_subtitle))
+                .setContentIntent(pending)
+                .setOngoing(true)
+                .setOnlyAlertOnce(true)
+                .setCategory(NotificationCompat.CATEGORY_SERVICE)
+                .build();
+    }
+
+    private void updateNotification() {
+        NotificationManager nm = getSystemService(NotificationManager.class);
+        if (nm != null) {
+            nm.notify(NOTIFICATION_ID, buildNotification());
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/MainActivity.java

@@ -0,0 +1,169 @@
+package com.grigowashere.loratester;
+
+import android.Manifest;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.PowerManager;
+import android.provider.Settings;
+import android.widget.Toast;
+
+import androidx.activity.EdgeToEdge;
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts;
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.content.ContextCompat;
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
+import androidx.viewpager2.widget.ViewPager2;
+
+import com.google.android.material.tabs.TabLayout;
+import com.google.android.material.tabs.TabLayoutMediator;
+import com.grigowashere.loratester.ui.MainPagerAdapter;
+
+public class MainActivity extends AppCompatActivity {
+
+    private LoraApp app;
+    private SettingsRepository settings;
+    private boolean backgroundLocationRequested;
+
+    private final ActivityResultLauncher<String[]> locationPermissionLauncher =
+            registerForActivityResult(
+                    new ActivityResultContracts.RequestMultiplePermissions(),
+                    result -> onForegroundLocationReady()
+            );
+
+    private final ActivityResultLauncher<String> backgroundLocationLauncher =
+            registerForActivityResult(
+                    new ActivityResultContracts.RequestPermission(),
+                    granted -> startBackgroundWork()
+            );
+
+    private final ActivityResultLauncher<String> notificationPermissionLauncher =
+            registerForActivityResult(
+                    new ActivityResultContracts.RequestPermission(),
+                    granted -> startBackgroundWork()
+            );
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        EdgeToEdge.enable(this);
+        setContentView(R.layout.activity_main);
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
+            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
+            return insets;
+        });
+
+        app = (LoraApp) getApplication();
+        settings = app.getSettingsRepository();
+
+        ViewPager2 pager = findViewById(R.id.viewPager);
+        TabLayout tabs = findViewById(R.id.tabLayout);
+        pager.setOffscreenPageLimit(1);
+        pager.setAdapter(new MainPagerAdapter(this));
+        new TabLayoutMediator(tabs, pager, (tab, position) -> {
+            int titleRes = switch (position) {
+                case 0 -> R.string.tab_map;
+                case 1 -> R.string.tab_stats;
+                case 2 -> R.string.tab_at;
+                case 3 -> R.string.tab_chat;
+                default -> R.string.tab_settings;
+            };
+            tab.setText(titleRes);
+        }).attach();
+
+        requestStartupPermissions();
+        if (settings.isTelnetEnabled()) {
+            app.getTelemetryUploader().startTelnet();
+        }
+    }
+
+    private void requestStartupPermissions() {
+        if (hasForegroundLocation()) {
+            onForegroundLocationReady();
+            return;
+        }
+        locationPermissionLauncher.launch(new String[]{
+                Manifest.permission.ACCESS_FINE_LOCATION,
+                Manifest.permission.ACCESS_COARSE_LOCATION
+        });
+    }
+
+    private void onForegroundLocationReady() {
+        if (!hasForegroundLocation()) {
+            Toast.makeText(this, R.string.background_location_required, Toast.LENGTH_LONG).show();
+            return;
+        }
+        requestNotificationPermissionIfNeeded();
+        requestBackgroundLocationIfNeeded();
+        startBackgroundWork();
+    }
+
+    private void requestNotificationPermissionIfNeeded() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) {
+            return;
+        }
+        if (ContextCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS)
+                == PackageManager.PERMISSION_GRANTED) {
+            return;
+        }
+        notificationPermissionLauncher.launch(Manifest.permission.POST_NOTIFICATIONS);
+    }
+
+    private void requestBackgroundLocationIfNeeded() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+            return;
+        }
+        if (hasBackgroundLocation()) {
+            return;
+        }
+        if (backgroundLocationRequested) {
+            return;
+        }
+        backgroundLocationRequested = true;
+        if (shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_BACKGROUND_LOCATION)) {
+            Toast.makeText(this, R.string.background_location_rationale, Toast.LENGTH_LONG).show();
+        }
+        backgroundLocationLauncher.launch(Manifest.permission.ACCESS_BACKGROUND_LOCATION);
+    }
+
+    private void startBackgroundWork() {
+        LoraForegroundService.ensureRunning(this);
+        if (settings.isTelnetEnabled()) {
+            app.getTelemetryUploader().startTelnet();
+        }
+    }
+
+    private boolean hasForegroundLocation() {
+        return ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
+                == PackageManager.PERMISSION_GRANTED;
+    }
+
+    private boolean hasBackgroundLocation() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+            return hasForegroundLocation();
+        }
+        return ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_BACKGROUND_LOCATION)
+                == PackageManager.PERMISSION_GRANTED;
+    }
+
+    public static void openBatteryOptimizationSettings(@NonNull android.content.Context context) {
+        Intent intent = new Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS);
+        intent.setData(Uri.parse("package:" + context.getPackageName()));
+        context.startActivity(intent);
+    }
+
+    public static boolean isIgnoringBatteryOptimizations(@NonNull android.content.Context context) {
+        PowerManager pm = (PowerManager) context.getSystemService(POWER_SERVICE);
+        if (pm == null) {
+            return true;
+        }
+        return pm.isIgnoringBatteryOptimizations(context.getPackageName());
+    }
+}

app/src/main/java/com/grigowashere/loratester/PeerDevices.java

@@ -0,0 +1,77 @@
+package com.grigowashere.loratester;
+
+import com.grigowashere.loratester.api.DeviceInfo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public final class PeerDevices {
+
+    private static final long ONLINE_MS = 30_000;
+
+    private PeerDevices() {
+    }
+
+    public static Result resolve(List<DeviceInfo> devices, String selfId) {
+        if (devices == null || selfId == null) {
+            return Result.error("no_devices");
+        }
+        List<DeviceInfo> android = new ArrayList<>();
+        long now = System.currentTimeMillis();
+        for (DeviceInfo d : devices) {
+            if (d.device_id != null && d.device_id.startsWith("android-")) {
+                android.add(d);
+            }
+        }
+        if (android.size() != 2) {
+            return Result.error("expected_two");
+        }
+        String peer = null;
+        int online = 0;
+        for (DeviceInfo d : android) {
+            if (d.last_seen > 0 && (now / 1000.0 - d.last_seen) <= 30) {
+                online++;
+            }
+            if (!selfId.equals(d.device_id)) {
+                peer = d.device_id;
+            }
+        }
+        if (peer == null) {
+            return Result.error("peer_missing");
+        }
+        return new Result(peer, android.size(), online);
+    }
+
+    public static final class Result {
+        public final String peerId;
+        public final int deviceCount;
+        public final int onlineCount;
+        public final String error;
+
+        private Result(String peerId, int deviceCount, int onlineCount) {
+            this.peerId = peerId;
+            this.deviceCount = deviceCount;
+            this.onlineCount = onlineCount;
+            this.error = null;
+        }
+
+        private Result(String error) {
+            this.peerId = null;
+            this.deviceCount = 0;
+            this.onlineCount = 0;
+            this.error = error;
+        }
+
+        static Result error(String code) {
+            return new Result(code);
+        }
+
+        public boolean ok() {
+            return peerId != null;
+        }
+
+        public boolean bothOnline() {
+            return ok() && onlineCount >= 2;
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/PeerStatsCache.java

@@ -0,0 +1,48 @@
+package com.grigowashere.loratester;
+
+import androidx.annotation.Nullable;
+
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicReference;
+
+public class PeerStatsCache {
+
+    public static final class Snapshot {
+        public final String meta;
+        public final String role;
+        public final Double rssi;
+        public final long atMs;
+
+        public Snapshot(String meta, String role, Double rssi, long atMs) {
+            this.meta = meta;
+            this.role = role;
+            this.rssi = rssi;
+            this.atMs = atMs;
+        }
+    }
+
+    private final AtomicReference<Snapshot> snapshot = new AtomicReference<>();
+
+    public void updateFromPayload(Map<String, Object> payload) {
+        if (payload == null) {
+            return;
+        }
+        String meta = payload.get("meta") != null ? String.valueOf(payload.get("meta")) : null;
+        String role = payload.get("role") != null ? String.valueOf(payload.get("role")) : null;
+        Double rssi = null;
+        Object r = payload.get("rssi");
+        if (r instanceof Number) {
+            rssi = ((Number) r).doubleValue();
+        }
+        snapshot.set(new Snapshot(meta, role, rssi, System.currentTimeMillis()));
+    }
+
+    @Nullable
+    public Snapshot get() {
+        return snapshot.get();
+    }
+
+    public void clear() {
+        snapshot.set(null);
+    }
+}

app/src/main/java/com/grigowashere/loratester/SettingsRepository.java

@@ -0,0 +1,122 @@
+package com.grigowashere.loratester;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+public class SettingsRepository {
+
+    private static final String PREFS = "loratester_settings";
+    private static final String KEY_SERVER_URL = "server_url";
+    private static final String KEY_TELNET_HOST = "telnet_host";
+    private static final String KEY_TELNET_PORT = "telnet_port";
+    private static final String KEY_RSSI_REGEX = "rssi_regex";
+    private static final String KEY_RANGE_REGEX = "range_regex";
+    private static final String KEY_TELNET_ENABLED = "telnet_enabled";
+    private static final String KEY_DEVICE_ID = "device_id";
+    private static final String KEY_DEVICE_LABEL = "device_label";
+
+    public static final String DEFAULT_SERVER = "https://lora.grigowashere.ru";
+    private static final String LEGACY_SERVER_HTTP = "http://grigowashere.ru:7634";
+    public static final String DEFAULT_TELNET_HOST = "127.0.0.1";
+    public static final int DEFAULT_TELNET_PORT = 2727;
+    public static final String DEFAULT_RSSI_REGEX = "(?:RSSI|Power)[:\\s]*(-?\\d+(?:\\.\\d+)?)";
+    public static final String DEFAULT_RANGE_REGEX = "range[:\\s]*([\\d.]+)";
+
+    private final SharedPreferences prefs;
+
+    public SettingsRepository(Context context) {
+        prefs = context.getApplicationContext()
+                .getSharedPreferences(PREFS, Context.MODE_PRIVATE);
+        migrateLegacyServerUrl();
+    }
+
+    private void migrateLegacyServerUrl() {
+        String current = prefs.getString(KEY_SERVER_URL, null);
+        if (current == null || !isLegacyServerUrl(current)) {
+            return;
+        }
+        prefs.edit().putString(KEY_SERVER_URL, DEFAULT_SERVER).apply();
+    }
+
+    static boolean isLegacyServerUrl(String url) {
+        if (url == null) {
+            return false;
+        }
+        String u = url.trim().toLowerCase();
+        while (u.endsWith("/")) {
+            u = u.substring(0, u.length() - 1);
+        }
+        return u.equals(LEGACY_SERVER_HTTP)
+                || u.equals("http://grigowashere.ru")
+                || u.equals("https://grigowashere.ru:7634");
+    }
+
+    public String getServerUrl() {
+        return prefs.getString(KEY_SERVER_URL, DEFAULT_SERVER);
+    }
+
+    public void setServerUrl(String url) {
+        prefs.edit().putString(KEY_SERVER_URL, url).apply();
+    }
+
+    public String getTelnetHost() {
+        return prefs.getString(KEY_TELNET_HOST, DEFAULT_TELNET_HOST);
+    }
+
+    public void setTelnetHost(String host) {
+        prefs.edit().putString(KEY_TELNET_HOST, host).apply();
+    }
+
+    public int getTelnetPort() {
+        return prefs.getInt(KEY_TELNET_PORT, DEFAULT_TELNET_PORT);
+    }
+
+    public void setTelnetPort(int port) {
+        prefs.edit().putInt(KEY_TELNET_PORT, port).apply();
+    }
+
+    public String getRssiRegex() {
+        return prefs.getString(KEY_RSSI_REGEX, DEFAULT_RSSI_REGEX);
+    }
+
+    public void setRssiRegex(String regex) {
+        prefs.edit().putString(KEY_RSSI_REGEX, regex).apply();
+    }
+
+    public String getRangeRegex() {
+        return prefs.getString(KEY_RANGE_REGEX, DEFAULT_RANGE_REGEX);
+    }
+
+    public void setRangeRegex(String regex) {
+        prefs.edit().putString(KEY_RANGE_REGEX, regex).apply();
+    }
+
+    public boolean isTelnetEnabled() {
+        return prefs.getBoolean(KEY_TELNET_ENABLED, false);
+    }
+
+    public void setTelnetEnabled(boolean enabled) {
+        prefs.edit().putBoolean(KEY_TELNET_ENABLED, enabled).apply();
+    }
+
+    public String getOrCreateDeviceId() {
+        String id = prefs.getString(KEY_DEVICE_ID, null);
+        if (id == null || id.isEmpty()) {
+            id = "android-" + java.util.UUID.randomUUID().toString().substring(0, 8);
+            prefs.edit().putString(KEY_DEVICE_ID, id).apply();
+        }
+        return id;
+    }
+
+    public String getDeviceLabel() {
+        return prefs.getString(KEY_DEVICE_LABEL, null);
+    }
+
+    public void setDeviceLabel(String label) {
+        if (label == null) {
+            prefs.edit().remove(KEY_DEVICE_LABEL).apply();
+        } else {
+            prefs.edit().putString(KEY_DEVICE_LABEL, label.trim()).apply();
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/TelemetryUploader.java

@@ -0,0 +1,428 @@
+package com.grigowashere.loratester;
+
+import android.content.Context;
+import android.os.Build;
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+
+import com.grigowashere.loratester.api.ServerApi;
+import com.grigowashere.loratester.api.TelemetryPayload;
+import com.grigowashere.loratester.api.UploadQueue;
+import com.grigowashere.loratester.net.NetworkMonitor;
+import com.grigowashere.loratester.location.GeoUtils;
+import com.grigowashere.loratester.telnet.AtCommandFormatter;
+import com.grigowashere.loratester.telnet.RadioMacroBuilder;
+import com.grigowashere.loratester.telnet.StatsExtractor;
+import com.grigowashere.loratester.telnet.TelnetClient;
+import com.grigowashere.loratester.telnet.TelnetFrameParser;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+
+public class TelemetryUploader implements TelnetClient.Listener {
+
+    private static final String TAG = "TelemetryUploader";
+
+    public interface AtSendCallback {
+        void onResult(TelnetClient.SendResult result);
+    }
+
+    public interface StatsListener {
+        void onStatsUpdated(StatsExtractor.ExtractedStats stats);
+    }
+
+    private final SettingsRepository settings;
+    private final Handler mainHandler = new Handler(Looper.getMainLooper());
+    private final ExecutorService uploadExecutor = Executors.newSingleThreadExecutor();
+    private final ExecutorService telnetExecutor = Executors.newSingleThreadExecutor(r -> {
+        Thread t = new Thread(r, "TelnetWorker");
+        t.setDaemon(true);
+        return t;
+    });
+    private TelnetClient telnetClient;
+    private TelnetFrameParser frameParser;
+    private StatsExtractor statsExtractor;
+    private ServerApi serverApi;
+
+    private static final int CONSOLE_MAX_CHARS = 16_384;
+    private static final long SNAPSHOT_INTERVAL_MS = 1000;
+
+    private final ScheduledExecutorService snapshotScheduler =
+            Executors.newSingleThreadScheduledExecutor(r -> {
+                Thread t = new Thread(r, "TelnetSnapshot");
+                t.setDaemon(true);
+                return t;
+            });
+    private volatile ScheduledFuture<?> snapshotFuture;
+
+    private volatile double lat = Double.NaN;
+    private volatile double lon = Double.NaN;
+    private volatile boolean connected;
+    private final StringBuilder consoleLog = new StringBuilder();
+    private volatile StatsExtractor.ExtractedStats lastStats;
+    private volatile long lastStatsAtMs;
+    private StatsListener statsListener;
+    private final UploadQueue uploadQueue;
+    private final NetworkMonitor networkMonitor;
+
+    public TelemetryUploader(
+            Context context,
+            SettingsRepository settings,
+            NetworkMonitor networkMonitor
+    ) {
+        this.settings = settings;
+        this.networkMonitor = networkMonitor;
+        uploadQueue = new UploadQueue(context.getApplicationContext());
+        serverApi = new ServerApi(settings.getServerUrl());
+        statsExtractor = StatsExtractor.withDefaults();
+        frameParser = new TelnetFrameParser(this::onFrame);
+        networkMonitor.addListener(online -> {
+            if (online) {
+                flushUploadQueue();
+            }
+        });
+        if (networkMonitor.isOnline()) {
+            uploadExecutor.execute(this::flushUploadQueue);
+        }
+    }
+
+    public int getPendingUploadCount() {
+        return uploadQueue.size();
+    }
+
+    public void refreshApi() {
+        serverApi = new ServerApi(settings.getServerUrl());
+        telnetExecutor.execute(() -> {
+            statsExtractor = new StatsExtractor(
+                    settings.getRssiRegex(),
+                    settings.getRangeRegex()
+            );
+            frameParser = new TelnetFrameParser(TelemetryUploader.this::onFrame);
+        });
+    }
+
+    public void updateLocation(double lat, double lon) {
+        if (GeoUtils.isValidCoordinate(lat, lon)) {
+            this.lat = lat;
+            this.lon = lon;
+        }
+    }
+
+    public boolean hasGpsFix() {
+        return GeoUtils.isValidCoordinate(lat, lon);
+    }
+
+    public double getGpsLat() {
+        return lat;
+    }
+
+    public double getGpsLon() {
+        return lon;
+    }
+
+    private Double validLat() {
+        return GeoUtils.isValidCoordinate(lat, lon) ? lat : null;
+    }
+
+    private Double validLon() {
+        return GeoUtils.isValidCoordinate(lat, lon) ? lon : null;
+    }
+
+    public void startTelnet() {
+        serverApi = new ServerApi(settings.getServerUrl());
+        telnetExecutor.execute(() -> {
+            if (telnetClient != null) {
+                telnetClient.stop();
+                telnetClient = null;
+            }
+            statsExtractor = new StatsExtractor(
+                    settings.getRssiRegex(),
+                    settings.getRangeRegex()
+            );
+            frameParser = new TelnetFrameParser(TelemetryUploader.this::onFrame);
+            telnetClient = new TelnetClient(
+                    settings.getTelnetHost(),
+                    settings.getTelnetPort(),
+                    TelemetryUploader.this
+            );
+            telnetClient.start();
+        });
+    }
+
+    public void stopTelnet() {
+        stopSnapshotTicker();
+        telnetExecutor.execute(() -> {
+            if (telnetClient != null) {
+                telnetClient.stop();
+                telnetClient = null;
+            }
+            if (frameParser != null) {
+                frameParser.flush();
+            }
+        });
+    }
+
+    public boolean isTelnetConnected() {
+        return connected;
+    }
+
+    /** Sends AT command on telnet worker thread (safe while receiving data). */
+    public void sendAtCommand(String command, AtSendCallback callback) {
+        telnetExecutor.execute(() -> {
+            TelnetClient.SendResult result = sendAtCommandOnWorker(command);
+            if (callback != null) {
+                mainHandler.post(() -> callback.onResult(result));
+            }
+        });
+    }
+
+    public void sendMacroSequence(List<String> lines, AtSendCallback callback) {
+        telnetExecutor.execute(() -> {
+            TelnetClient.SendResult last = TelnetClient.SendResult.SENT;
+            if (lines != null) {
+                for (int i = 0; i < lines.size(); i++) {
+                    String line = lines.get(i);
+                    if (line == null || line.isEmpty()) {
+                        continue;
+                    }
+                    last = sendLineOnWorker(line);
+                    if (last != TelnetClient.SendResult.SENT) {
+                        break;
+                    }
+                    if (i < lines.size() - 1) {
+                        try {
+                            Thread.sleep(150);
+                        } catch (InterruptedException ignored) {
+                            Thread.currentThread().interrupt();
+                            break;
+                        }
+                    }
+                }
+            }
+            if (callback != null) {
+                TelnetClient.SendResult r = last;
+                mainHandler.post(() -> callback.onResult(r));
+            }
+        });
+    }
+
+    private TelnetClient.SendResult sendLineOnWorker(String line) {
+        if (RadioMacroBuilder.STOP.equals(line)) {
+            appendConsole(">> S\n");
+            if (telnetClient == null) {
+                appendConsole("!! telnet not started\n");
+                return TelnetClient.SendResult.NOT_CONNECTED;
+            }
+            TelnetClient.SendResult result = telnetClient.sendRawLine(line);
+            if (result != TelnetClient.SendResult.SENT) {
+                appendConsole("!! send failed: " + result + "\n");
+            }
+            return result;
+        }
+        return sendAtCommandOnWorker(line);
+    }
+
+    private TelnetClient.SendResult sendAtCommandOnWorker(String command) {
+        String normalized = AtCommandFormatter.normalize(command);
+        appendConsole(">> " + normalized + "\n");
+        if (telnetClient == null) {
+            appendConsole("!! telnet not started\n");
+            return TelnetClient.SendResult.NOT_CONNECTED;
+        }
+        TelnetClient.SendResult result = telnetClient.sendAtCommand(command);
+        if (result != TelnetClient.SendResult.SENT) {
+            appendConsole("!! send failed: " + result + "\n");
+        }
+        return result;
+    }
+
+    public synchronized String getConsoleLog() {
+        return consoleLog.toString();
+    }
+
+    public synchronized void clearConsoleLog() {
+        consoleLog.setLength(0);
+    }
+
+    private synchronized void appendConsole(String text) {
+        consoleLog.append(text);
+        if (consoleLog.length() > CONSOLE_MAX_CHARS) {
+            consoleLog.delete(0, consoleLog.length() - CONSOLE_MAX_CHARS);
+        }
+    }
+
+    public void setStatsListener(StatsListener listener) {
+        this.statsListener = listener;
+        if (listener != null && lastStats != null) {
+            mainHandler.post(() -> listener.onStatsUpdated(lastStats));
+        }
+    }
+
+    public StatsExtractor.ExtractedStats getLastStats() {
+        return lastStats;
+    }
+
+    public long getLastStatsAtMs() {
+        return lastStatsAtMs;
+    }
+
+    private void onFrame(String frame) {
+        StatsExtractor.ExtractedStats stats = statsExtractor.extract(frame);
+        if (!stats.hasRadioFrame()) {
+            return;
+        }
+        lastStats = stats;
+        lastStatsAtMs = System.currentTimeMillis();
+        StatsListener listener = statsListener;
+        if (listener != null) {
+            mainHandler.post(() -> listener.onStatsUpdated(stats));
+        }
+        TelemetryPayload payload = new TelemetryPayload(
+                settings.getOrCreateDeviceId(),
+                phoneLabel(),
+                validLat(),
+                validLon(),
+                stats.rssi,
+                stats.rangeM,
+                null,
+                stats.metaJson,
+                stats.role,
+                System.currentTimeMillis() / 1000.0
+        );
+        uploadExecutor.execute(() -> uploadTelemetry(payload));
+    }
+
+    public void registerPresence() {
+        uploadExecutor.execute(() -> {
+            TelemetryPayload payload = new TelemetryPayload(
+                    settings.getOrCreateDeviceId(),
+                    phoneLabel(),
+                    null,
+                    null,
+                    null,
+                    null,
+                    null,
+                    null,
+                    null,
+                    System.currentTimeMillis() / 1000.0
+            );
+            uploadTelemetry(payload);
+        });
+    }
+
+    private String phoneLabel() {
+        String custom = settings.getDeviceLabel();
+        if (custom != null && !custom.isBlank()) {
+            return custom.trim();
+        }
+        String manufacturer = Build.MANUFACTURER != null ? Build.MANUFACTURER : "";
+        String model = Build.MODEL != null ? Build.MODEL : "";
+        String label = (manufacturer + " " + model).trim();
+        return label.isEmpty() ? null : label;
+    }
+
+    private void uploadTelemetry(TelemetryPayload payload) {
+        if (networkMonitor.isOnline()) {
+            try {
+                serverApi.postTelemetry(payload);
+                flushUploadQueue();
+                return;
+            } catch (Exception e) {
+                Log.e(TAG, "upload failed", e);
+                appendConsole("!! server upload: " + e.getMessage() + "\n");
+            }
+        }
+        uploadQueue.enqueue(payload);
+        int pending = uploadQueue.size();
+        if (pending > 0 && pending % 10 == 0) {
+            appendConsole("!! queued uploads: " + pending + "\n");
+        }
+    }
+
+    private void flushUploadQueue() {
+        if (!networkMonitor.isOnline()) {
+            return;
+        }
+        int sent = uploadQueue.flushAll(serverApi);
+        if (sent > 0) {
+            appendConsole(">> uploaded " + sent + " queued frame(s)\n");
+        }
+    }
+
+    @Override
+    public void onConnected() {
+        mainHandler.post(() -> connected = true);
+        startSnapshotTicker();
+    }
+
+    @Override
+    public void onDisconnected() {
+        stopSnapshotTicker();
+        mainHandler.post(() -> connected = false);
+    }
+
+    private void startSnapshotTicker() {
+        stopSnapshotTicker();
+        snapshotFuture = snapshotScheduler.scheduleAtFixedRate(
+                () -> telnetExecutor.execute(this::tickSnapshot),
+                SNAPSHOT_INTERVAL_MS,
+                SNAPSHOT_INTERVAL_MS,
+                TimeUnit.MILLISECONDS
+        );
+    }
+
+    private void stopSnapshotTicker() {
+        if (snapshotFuture != null) {
+            snapshotFuture.cancel(false);
+            snapshotFuture = null;
+        }
+    }
+
+    private void tickSnapshot() {
+        if (frameParser != null && connected) {
+            frameParser.emitSnapshot();
+        }
+    }
+
+    @Override
+    public void onBytes(byte[] data, int length) {
+        byte[] copy = Arrays.copyOf(data, length);
+        telnetExecutor.execute(() -> {
+            appendConsole(new String(copy, StandardCharsets.UTF_8));
+            if (frameParser != null) {
+                frameParser.append(copy);
+            }
+        });
+    }
+
+    @Override
+    public void onError(String message) {
+        Log.w(TAG, "telnet: " + message);
+        telnetExecutor.execute(() -> appendConsole("!! " + message + "\n"));
+    }
+
+    /** Feeds simulated telnet stream for testing without hardware. */
+    public void simulateChunk(String text) {
+        byte[] bytes = text.getBytes(StandardCharsets.UTF_8);
+        telnetExecutor.execute(() -> {
+            if (frameParser != null) {
+                frameParser.append(bytes);
+            }
+        });
+    }
+
+    public ServerApi getServerApi() {
+        return serverApi;
+    }
+
+    public String getDeviceId() {
+        return settings.getOrCreateDeviceId();
+    }
+}

app/src/main/java/com/grigowashere/loratester/api/ChatMessage.java

@@ -0,0 +1,8 @@
+package com.grigowashere.loratester.api;
+
+public class ChatMessage {
+    public long id;
+    public String device_id;
+    public String text;
+    public double ts;
+}

app/src/main/java/com/grigowashere/loratester/api/DeviceCommand.java

@@ -0,0 +1,13 @@
+package com.grigowashere.loratester.api;
+
+import java.util.Map;
+
+public class DeviceCommand {
+    public long id;
+    public String from_device_id;
+    public String to_device_id;
+    public String kind;
+    public Map<String, Object> payload;
+    public double created_at;
+    public Double delivered_at;
+}

app/src/main/java/com/grigowashere/loratester/api/DeviceInfo.java

@@ -0,0 +1,16 @@
+package com.grigowashere.loratester.api;
+
+public class DeviceInfo {
+    public String device_id;
+    public String label;
+    public double last_seen;
+    public Double lat;
+    public Double lon;
+    public Double rssi;
+    public Double range_m;
+    public String raw_frame;
+    public String meta;
+    /** TX or RX from last telnet frame. */
+    public String role;
+    public Double ts;
+}

app/src/main/java/com/grigowashere/loratester/api/ElevationGridResult.java

@@ -0,0 +1,30 @@
+package com.grigowashere.loratester.api;
+
+import java.util.List;
+
+public class ElevationGridResult {
+    public boolean ok;
+    public String error;
+    public Center center;
+    public double radius_m;
+    public double step_m;
+    public double min_delta_m;
+    public double max_delta_m;
+    public List<GridPoint> points;
+
+    public static class Center {
+        public double lat;
+        public double lon;
+        public double elevation_m;
+    }
+
+    public static class GridPoint {
+        public int i;
+        public int j;
+        public double lat;
+        public double lon;
+        public double dist_m;
+        public Double elevation_m;
+        public double delta_m;
+    }
+}

app/src/main/java/com/grigowashere/loratester/api/NearestHillResult.java

@@ -0,0 +1,19 @@
+package com.grigowashere.loratester.api;
+
+public class NearestHillResult {
+    public boolean ok;
+    public String error;
+    public HillPoint center;
+    public HillPoint hill;
+    public double radius_m;
+    public int candidates;
+
+    public static class HillPoint {
+        public double lat;
+        public double lon;
+        public Double elevation_m;
+        public Double dist_m;
+        public Double prominence_m;
+        public Boolean is_local_max;
+    }
+}

app/src/main/java/com/grigowashere/loratester/api/PairedTrackSession.java

@@ -0,0 +1,15 @@
+package com.grigowashere.loratester.api;
+
+public class PairedTrackSession {
+    public long id;
+    public String device_a;
+    public String device_b;
+    public String initiator;
+    public String status;
+    public double start_at;
+    public Long track_id_a;
+    public Long track_id_b;
+    public double created_at;
+    public double server_time;
+    public boolean ready;
+}

app/src/main/java/com/grigowashere/loratester/api/ServerApi.java

@@ -0,0 +1,309 @@
+package com.grigowashere.loratester.api;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import com.google.gson.reflect.TypeToken;
+
+import java.io.IOException;
+import java.lang.reflect.Type;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import okhttp3.MediaType;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
+
+public class ServerApi {
+
+    public static final String HEADER_LORA_CLIENT = "X-Lora-Client";
+    public static final String CLIENT_ANDROID = "android";
+
+    private static final MediaType JSON = MediaType.get("application/json; charset=utf-8");
+    private static final Gson GSON = new Gson();
+    private static final Type DEVICE_LIST = new TypeToken<List<DeviceInfo>>() {}.getType();
+    private static final Type CHAT_LIST = new TypeToken<List<ChatMessage>>() {}.getType();
+    private static final Type TELEMETRY_HISTORY =
+            new TypeToken<List<TelemetryHistoryItem>>() {}.getType();
+    private static final Type TRACK_LIST = new TypeToken<List<TrackInfo>>() {}.getType();
+    private static final Type COMMAND_LIST = new TypeToken<List<DeviceCommand>>() {}.getType();
+
+    private final String baseUrl;
+    private final OkHttpClient client;
+
+    public ServerApi(String baseUrl) {
+        String url = baseUrl == null ? "" : baseUrl.trim();
+        while (url.endsWith("/")) {
+            url = url.substring(0, url.length() - 1);
+        }
+        this.baseUrl = url;
+        this.client = new OkHttpClient.Builder()
+                .connectTimeout(20, TimeUnit.SECONDS)
+                .readTimeout(60, TimeUnit.SECONDS)
+                .writeTimeout(60, TimeUnit.SECONDS)
+                .build();
+    }
+
+    public void postTelemetry(TelemetryPayload payload) throws IOException {
+        Map<String, Object> body = new HashMap<>();
+        body.put("device_id", payload.deviceId);
+        if (payload.deviceLabel != null && !payload.deviceLabel.isBlank()) {
+            body.put("device_label", payload.deviceLabel);
+        }
+        if (payload.lat != null) body.put("lat", payload.lat);
+        if (payload.lon != null) body.put("lon", payload.lon);
+        if (payload.rssi != null) body.put("rssi", payload.rssi);
+        if (payload.rangeM != null) body.put("range_m", payload.rangeM);
+        if (payload.meta != null) {
+            try {
+                JsonObject meta = JsonParser.parseString(payload.meta).getAsJsonObject();
+                body.put("meta", GSON.fromJson(meta, Map.class));
+                if (meta.has("fields") && meta.get("fields").isJsonObject()) {
+                    body.put("fields", GSON.fromJson(meta.get("fields"), Map.class));
+                }
+            } catch (Exception ignored) {
+                body.put("meta", payload.meta);
+            }
+        }
+        if (payload.role != null) body.put("role", payload.role);
+        if (payload.ts != null) body.put("ts", payload.ts);
+        postJson("/api/telemetry", body, true);
+    }
+
+    public List<DeviceInfo> getDevices() throws IOException {
+        return getJsonList("/api/devices", DEVICE_LIST);
+    }
+
+    public void postChat(String deviceId, String text) throws IOException {
+        Map<String, Object> body = new HashMap<>();
+        body.put("device_id", deviceId);
+        body.put("text", text);
+        postJson("/api/chat", body);
+    }
+
+    public List<ChatMessage> getChat(double since) throws IOException {
+        String path = "/api/chat?since=" + since;
+        return getJsonList(path, CHAT_LIST);
+    }
+
+    public List<TelemetryHistoryItem> getTelemetryHistory(String deviceId, int limit)
+            throws IOException {
+        String path = "/api/telemetry?device_id=" + deviceId + "&limit=" + limit;
+        return getJsonList(path, TELEMETRY_HISTORY);
+    }
+
+    public long startTrack(String deviceId) throws IOException {
+        Map<String, Object> body = new HashMap<>();
+        body.put("device_id", deviceId);
+        Map<String, Object> resp = postJsonMap("/api/tracks/start", body, true);
+        Number id = (Number) resp.get("track_id");
+        return id.longValue();
+    }
+
+    public void addTrackPoints(long trackId, List<Map<String, Object>> points) throws IOException {
+        Map<String, Object> body = new HashMap<>();
+        body.put("points", points);
+        postJson("/api/tracks/" + trackId + "/points", body, true);
+    }
+
+    public void finishTrack(long trackId) throws IOException {
+        postJson("/api/tracks/" + trackId + "/finish", new HashMap<>(), true);
+    }
+
+    public List<TrackInfo> listTracks(String deviceId) throws IOException {
+        return getJsonList("/api/tracks?device_id=" + deviceId + "&limit=50", TRACK_LIST);
+    }
+
+    public void postCommand(
+            String fromDeviceId,
+            String toDeviceId,
+            String kind,
+            Map<String, Object> payload
+    ) throws IOException {
+        Map<String, Object> body = new HashMap<>();
+        body.put("from_device_id", fromDeviceId);
+        body.put("to_device_id", toDeviceId);
+        body.put("kind", kind);
+        if (payload != null) {
+            body.put("payload", payload);
+        }
+        postJson("/api/commands", body, true);
+    }
+
+    public List<DeviceCommand> pollPendingCommands(String deviceId) throws IOException {
+        String path = "/api/commands/pending?device_id="
+                + java.net.URLEncoder.encode(deviceId, "UTF-8") + "&limit=20";
+        Request request = new Request.Builder()
+                .url(baseUrl + path)
+                .header(HEADER_LORA_CLIENT, CLIENT_ANDROID)
+                .get()
+                .build();
+        try (Response response = client.newCall(request).execute()) {
+            if (!response.isSuccessful() || response.body() == null) {
+                throw new IOException("HTTP " + response.code());
+            }
+            return GSON.fromJson(response.body().string(), COMMAND_LIST);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public Map<String, Object> startPairedTrack(Map<String, Object> body) throws IOException {
+        return postJsonMap("/api/paired-tracks/start", body, true);
+    }
+
+    @SuppressWarnings("unchecked")
+    public Map<String, Object> getActivePairedTrack() throws IOException {
+        Request request = new Request.Builder()
+                .url(baseUrl + "/api/paired-tracks/active")
+                .get()
+                .build();
+        try (Response response = client.newCall(request).execute()) {
+            if (!response.isSuccessful() || response.body() == null) {
+                throw new IOException("HTTP " + response.code());
+            }
+            return GSON.fromJson(response.body().string(), Map.class);
+        }
+    }
+
+    public void ackPairedTrack(long sessionId, String deviceId, long trackId) throws IOException {
+        Map<String, Object> body = new HashMap<>();
+        body.put("session_id", sessionId);
+        body.put("device_id", deviceId);
+        body.put("track_id", trackId);
+        postJson("/api/paired-tracks/ack", body, true);
+    }
+
+    public void cancelPairedTrack(Long sessionId) throws IOException {
+        Map<String, Object> body = new HashMap<>();
+        if (sessionId != null) {
+            body.put("session_id", sessionId);
+        }
+        postJson("/api/paired-tracks/cancel", body, false);
+    }
+
+    public TrackDetail getTrack(long trackId) throws IOException {
+        Request request = new Request.Builder()
+                .url(baseUrl + "/api/tracks/" + trackId)
+                .get()
+                .build();
+        try (Response response = client.newCall(request).execute()) {
+            if (!response.isSuccessful() || response.body() == null) {
+                throw new IOException("HTTP " + response.code());
+            }
+            return GSON.fromJson(response.body().string(), TrackDetail.class);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public Map<String, Object> getHealth() throws IOException {
+        Request request = new Request.Builder()
+                .url(baseUrl + "/api/health")
+                .get()
+                .build();
+        try (Response response = client.newCall(request).execute()) {
+            if (!response.isSuccessful() || response.body() == null) {
+                throw new IOException("HTTP " + response.code());
+            }
+            return GSON.fromJson(response.body().string(), Map.class);
+        }
+    }
+
+    public NearestHillResult findNearestHill(double lat, double lon, int radiusM)
+            throws IOException {
+        String path = "/api/elevation/nearest-hill?lat="
+                + lat
+                + "&lon="
+                + lon
+                + "&radius_m="
+                + radiusM;
+        Request request = new Request.Builder()
+                .url(baseUrl + path)
+                .get()
+                .build();
+        try (Response response = client.newCall(request).execute()) {
+            if (!response.isSuccessful() || response.body() == null) {
+                throw new IOException("HTTP " + response.code());
+            }
+            return GSON.fromJson(response.body().string(), NearestHillResult.class);
+        }
+    }
+
+    public ElevationGridResult getElevationGrid(double lat, double lon, int radiusM, int stepM)
+            throws IOException {
+        String path = "/api/elevation/grid?lat="
+                + lat
+                + "&lon="
+                + lon
+                + "&radius_m="
+                + radiusM
+                + "&step_m="
+                + stepM;
+        Request request = new Request.Builder()
+                .url(baseUrl + path)
+                .get()
+                .build();
+        try (Response response = client.newCall(request).execute()) {
+            if (!response.isSuccessful() || response.body() == null) {
+                throw new IOException("HTTP " + response.code());
+            }
+            return GSON.fromJson(response.body().string(), ElevationGridResult.class);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private Map<String, Object> postJsonMap(String path, Map<String, Object> body, boolean android)
+            throws IOException {
+        Request.Builder builder = new Request.Builder()
+                .url(baseUrl + path)
+                .post(RequestBody.create(GSON.toJson(body), JSON));
+        if (android) {
+            builder.header(HEADER_LORA_CLIENT, CLIENT_ANDROID);
+        }
+        try (Response response = client.newCall(builder.build()).execute()) {
+            if (!response.isSuccessful() || response.body() == null) {
+                throw new IOException("HTTP " + response.code());
+            }
+            return GSON.fromJson(response.body().string(), Map.class);
+        }
+    }
+
+    private void postJson(String path, Map<String, Object> body) throws IOException {
+        postJson(path, body, false);
+    }
+
+    private void postJson(String path, Map<String, Object> body, boolean androidClient)
+            throws IOException {
+        Request.Builder builder = new Request.Builder()
+                .url(baseUrl + path)
+                .post(RequestBody.create(GSON.toJson(body), JSON));
+        if (androidClient) {
+            builder.header(HEADER_LORA_CLIENT, CLIENT_ANDROID);
+        }
+        execute(builder.build());
+    }
+
+    private <T> T getJsonList(String path, Type type) throws IOException {
+        Request request = new Request.Builder()
+                .url(baseUrl + path)
+                .get()
+                .build();
+        try (Response response = client.newCall(request).execute()) {
+            if (!response.isSuccessful() || response.body() == null) {
+                throw new IOException("HTTP " + response.code());
+            }
+            return GSON.fromJson(response.body().string(), type);
+        }
+    }
+
+    private void execute(Request request) throws IOException {
+        try (Response response = client.newCall(request).execute()) {
+            if (!response.isSuccessful()) {
+                throw new IOException("HTTP " + response.code());
+            }
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/api/TelemetryHistoryItem.java

@@ -0,0 +1,14 @@
+package com.grigowashere.loratester.api;
+
+public class TelemetryHistoryItem {
+    public long id;
+    public String device_id;
+    public Double lat;
+    public Double lon;
+    public Double rssi;
+    public Double range_m;
+    public String meta;
+    public String role;
+    public double ts;
+    public String source;
+}

app/src/main/java/com/grigowashere/loratester/api/TelemetryPayload.java

@@ -0,0 +1,53 @@
+package com.grigowashere.loratester.api;
+
+public class TelemetryPayload {
+    public final String deviceId;
+    public final String deviceLabel;
+    public final Double lat;
+    public final Double lon;
+    public final Double rssi;
+    public final Double rangeM;
+    public final String rawFrame;
+    public final String meta;
+    /** TX = передатчик, RX = приёмник. */
+    public final String role;
+    public final Double ts;
+
+    public TelemetryPayload(
+            String deviceId,
+            Double lat,
+            Double lon,
+            Double rssi,
+            Double rangeM,
+            String rawFrame,
+            String meta,
+            String role,
+            Double ts
+    ) {
+        this(deviceId, null, lat, lon, rssi, rangeM, rawFrame, meta, role, ts);
+    }
+
+    public TelemetryPayload(
+            String deviceId,
+            String deviceLabel,
+            Double lat,
+            Double lon,
+            Double rssi,
+            Double rangeM,
+            String rawFrame,
+            String meta,
+            String role,
+            Double ts
+    ) {
+        this.deviceId = deviceId;
+        this.deviceLabel = deviceLabel;
+        this.lat = lat;
+        this.lon = lon;
+        this.rssi = rssi;
+        this.rangeM = rangeM;
+        this.rawFrame = rawFrame;
+        this.meta = meta;
+        this.role = role;
+        this.ts = ts;
+    }
+}

app/src/main/java/com/grigowashere/loratester/api/TrackDetail.java

@@ -0,0 +1,23 @@
+package com.grigowashere.loratester.api;
+
+import java.util.List;
+
+public class TrackDetail {
+    public long id;
+    public String device_id;
+    public double started_at;
+    public Double ended_at;
+    public String label;
+    public List<TrackPoint> points;
+
+    public static class TrackPoint {
+        public double ts;
+        public double lat;
+        public double lon;
+        public Double altitude_gps;
+        public Double elevation_m;
+        public Double rssi;
+        public String role;
+        public String meta;
+    }
+}

app/src/main/java/com/grigowashere/loratester/api/TrackInfo.java

@@ -0,0 +1,10 @@
+package com.grigowashere.loratester.api;
+
+public class TrackInfo {
+    public long id;
+    public String device_id;
+    public double started_at;
+    public Double ended_at;
+    public String label;
+    public int point_count;
+}

app/src/main/java/com/grigowashere/loratester/api/UploadQueue.java

@@ -0,0 +1,152 @@
+package com.grigowashere.loratester.api;
+
+import android.content.Context;
+import android.util.Log;
+
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Objects;
+
+/** Persistent queue for telemetry uploads when the network is down. */
+public class UploadQueue {
+
+    private static final String TAG = "UploadQueue";
+    private static final String FILE_NAME = "telemetry_upload_queue.json";
+    private static final int MAX_ITEMS = 500;
+
+    private static final Gson GSON = new Gson();
+    private static final Type LIST_TYPE = new TypeToken<List<QueuedItem>>() {}.getType();
+
+    private final File queueFile;
+    private final List<QueuedItem> items = new ArrayList<>();
+    private String lastMeta;
+
+    public UploadQueue(Context context) {
+        queueFile = new File(context.getFilesDir(), FILE_NAME);
+        load();
+    }
+
+    public synchronized int size() {
+        return items.size();
+    }
+
+    public synchronized void enqueue(TelemetryPayload payload) {
+        if (payload == null) {
+            return;
+        }
+        if (payload.meta != null && payload.meta.equals(lastMeta)) {
+            return;
+        }
+        lastMeta = payload.meta;
+        items.add(QueuedItem.from(payload));
+        trim();
+        persist();
+    }
+
+    public synchronized int flushAll(ServerApi api) {
+        if (api == null || items.isEmpty()) {
+            return 0;
+        }
+        int sent = 0;
+        Iterator<QueuedItem> it = items.iterator();
+        while (it.hasNext()) {
+            QueuedItem item = it.next();
+            try {
+                api.postTelemetry(item.toPayload());
+                it.remove();
+                sent++;
+            } catch (Exception e) {
+                Log.w(TAG, "flush stopped at " + sent + " sent", e);
+                break;
+            }
+        }
+        if (sent > 0) {
+            persist();
+        }
+        return sent;
+    }
+
+    private void trim() {
+        while (items.size() > MAX_ITEMS) {
+            items.remove(0);
+        }
+    }
+
+    private void load() {
+        if (!queueFile.exists()) {
+            return;
+        }
+        try (FileReader reader = new FileReader(queueFile)) {
+            List<QueuedItem> loaded = GSON.fromJson(reader, LIST_TYPE);
+            if (loaded != null) {
+                items.clear();
+                items.addAll(loaded);
+                trim();
+            }
+        } catch (Exception e) {
+            Log.w(TAG, "load queue failed", e);
+        }
+    }
+
+    private void persist() {
+        try (FileWriter writer = new FileWriter(queueFile)) {
+            GSON.toJson(items, writer);
+        } catch (Exception e) {
+            Log.w(TAG, "persist queue failed", e);
+        }
+    }
+
+    static final class QueuedItem {
+        String deviceId;
+        Double lat;
+        Double lon;
+        Double rssi;
+        Double rangeM;
+        String rawFrame;
+        String meta;
+        String role;
+        Double ts;
+
+        static QueuedItem from(TelemetryPayload p) {
+            QueuedItem q = new QueuedItem();
+            q.deviceId = p.deviceId;
+            q.lat = p.lat;
+            q.lon = p.lon;
+            q.rssi = p.rssi;
+            q.rangeM = p.rangeM;
+            q.rawFrame = p.rawFrame;
+            q.meta = p.meta;
+            q.role = p.role;
+            q.ts = p.ts;
+            return q;
+        }
+
+        TelemetryPayload toPayload() {
+            return new TelemetryPayload(
+                    deviceId, lat, lon, rssi, rangeM, rawFrame, meta, role, ts);
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (!(o instanceof QueuedItem other)) {
+                return false;
+            }
+            return Objects.equals(deviceId, other.deviceId)
+                    && Objects.equals(meta, other.meta)
+                    && Objects.equals(ts, other.ts);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(deviceId, meta, ts);
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/location/GeoUtils.java

@@ -0,0 +1,33 @@
+package com.grigowashere.loratester.location;
+
+public final class GeoUtils {
+
+    private static final double ZERO_EPS = 1e-5;
+
+    private GeoUtils() {
+    }
+
+    public static boolean isValidCoordinate(double lat, double lon) {
+        if (Double.isNaN(lat) || Double.isNaN(lon) || Double.isInfinite(lat) || Double.isInfinite(lon)) {
+            return false;
+        }
+        if (Math.abs(lat) < ZERO_EPS && Math.abs(lon) < ZERO_EPS) {
+            return false;
+        }
+        return lat >= -90.0 && lat <= 90.0 && lon >= -180.0 && lon <= 180.0;
+    }
+
+    public static boolean isValidCoordinate(Double lat, Double lon) {
+        return lat != null && lon != null && isValidCoordinate(lat.doubleValue(), lon.doubleValue());
+    }
+
+    public static double haversineMeters(double lat1, double lon1, double lat2, double lon2) {
+        final double r = 6_371_000;
+        double dLat = Math.toRadians(lat2 - lat1);
+        double dLon = Math.toRadians(lon2 - lon1);
+        double a = Math.sin(dLat / 2) * Math.sin(dLat / 2)
+                + Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2))
+                * Math.sin(dLon / 2) * Math.sin(dLon / 2);
+        return r * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+    }
+}

app/src/main/java/com/grigowashere/loratester/location/LocationTracker.java

@@ -0,0 +1,65 @@
+package com.grigowashere.loratester.location;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.os.Looper;
+
+import com.google.android.gms.location.FusedLocationProviderClient;
+import com.google.android.gms.location.LocationCallback;
+import com.google.android.gms.location.LocationRequest;
+import com.google.android.gms.location.LocationResult;
+import com.google.android.gms.location.LocationServices;
+import com.google.android.gms.location.Priority;
+
+public class LocationTracker {
+
+    public interface Listener {
+        void onLocation(double lat, double lon, double altitude);
+    }
+
+    private final FusedLocationProviderClient client;
+    private final Listener listener;
+    private LocationCallback callback;
+
+    public LocationTracker(Context context, Listener listener) {
+        this.client = LocationServices.getFusedLocationProviderClient(context);
+        this.listener = listener;
+    }
+
+    @SuppressLint("MissingPermission")
+    public void start() {
+        if (callback != null) {
+            return;
+        }
+        LocationRequest request = new LocationRequest.Builder(
+                Priority.PRIORITY_HIGH_ACCURACY, 10_000L
+        )
+                .setMinUpdateIntervalMillis(5_000L)
+                .setMaxUpdateDelayMillis(15_000L)
+                .setWaitForAccurateLocation(false)
+                .build();
+
+        callback = new LocationCallback() {
+            @Override
+            public void onLocationResult(LocationResult result) {
+                if (result.getLastLocation() == null) {
+                    return;
+                }
+                double lat = result.getLastLocation().getLatitude();
+                double lon = result.getLastLocation().getLongitude();
+                double alt = result.getLastLocation().getAltitude();
+                if (GeoUtils.isValidCoordinate(lat, lon)) {
+                    listener.onLocation(lat, lon, alt);
+                }
+            }
+        };
+        client.requestLocationUpdates(request, callback, Looper.getMainLooper());
+    }
+
+    public void stop() {
+        if (callback != null) {
+            client.removeLocationUpdates(callback);
+            callback = null;
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/map/EsriWorldImagery.java

@@ -0,0 +1,37 @@
+package com.grigowashere.loratester.map;
+
+import org.mapsforge.core.model.Tile;
+import org.mapsforge.map.layer.download.tilesource.OnlineTileSource;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+
+/** Esri World Imagery — tile path is zoom/y/x (not OSM zoom/x/y). */
+public final class EsriWorldImagery extends OnlineTileSource {
+
+    public static final EsriWorldImagery INSTANCE = new EsriWorldImagery();
+
+    private EsriWorldImagery() {
+        super(new String[]{"server.arcgisonline.com"}, 443);
+        setName("Esri.WorldImagery")
+                .setAlpha(false)
+                .setBaseUrl("/ArcGIS/rest/services/World_Imagery/MapServer/tile/")
+                .setExtension("png")
+                .setParallelRequestsLimit(4)
+                .setProtocol("https")
+                .setTileSize(256)
+                .setZoomLevelMax((byte) 18)
+                .setZoomLevelMin((byte) 0);
+        setUserAgent("LoraTester/1.0");
+    }
+
+    @Override
+    public URL getTileUrl(Tile tile) throws MalformedURLException {
+        StringBuilder path = new StringBuilder(48);
+        path.append(getBaseUrl());
+        path.append(tile.zoomLevel).append('/');
+        path.append(tile.tileY).append('/');
+        path.append(tile.tileX).append('.').append(getExtension());
+        return new URL(getProtocol(), getHostName(), 443, path.toString());
+    }
+}

app/src/main/java/com/grigowashere/loratester/model/RadioSnapshot.java

@@ -0,0 +1,271 @@
+package com.grigowashere.loratester.model;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import com.grigowashere.loratester.telnet.StatsExtractor;
+
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
+/** Normalized radio stats from telemetry meta JSON (no duplicate fields). */
+public final class RadioSnapshot {
+
+    public final String role;
+    public final String frame;
+    public final Double frequencyMhz;
+    public final Integer sf;
+    public final Double bwKhz;
+    public final Double powerDbm;
+    public final Double rssiDbm;
+    public final Double snrDb;
+    public final Integer packet;
+    public final String payload;
+    public final Double onAirMs;
+    public final Double txPktPerS;
+    public final Double rxPktPerS;
+    public final Double perPercent;
+    public final Double rxQualityPercent;
+    public final String codeRate;
+    public final Integer preambleLength;
+    public final String lowDataRateOpt;
+    public final Boolean crcEnabled;
+    public final Integer payloadLengthBytes;
+    public final Double txTimeoutMs;
+    public final Integer packetReceive;
+    public final Integer packetTotal;
+    public final Integer packetError;
+    public final Integer crcError;
+    public final Integer preambleDetected;
+    public final Integer headerValid;
+    public final Map<String, String> extraFields;
+
+    public RadioSnapshot(
+            String role,
+            String frame,
+            Double frequencyMhz,
+            Integer sf,
+            Double bwKhz,
+            Double powerDbm,
+            Double rssiDbm,
+            Double snrDb,
+            Integer packet,
+            String payload,
+            Double onAirMs,
+            Double txPktPerS,
+            Double rxPktPerS,
+            Double perPercent,
+            Double rxQualityPercent,
+            String codeRate,
+            Integer preambleLength,
+            String lowDataRateOpt,
+            Boolean crcEnabled,
+            Integer payloadLengthBytes,
+            Double txTimeoutMs,
+            Integer packetReceive,
+            Integer packetTotal,
+            Integer packetError,
+            Integer crcError,
+            Integer preambleDetected,
+            Integer headerValid,
+            Map<String, String> extraFields
+    ) {
+        this.role = role;
+        this.frame = frame;
+        this.frequencyMhz = frequencyMhz;
+        this.sf = sf;
+        this.bwKhz = bwKhz;
+        this.powerDbm = powerDbm;
+        this.rssiDbm = rssiDbm;
+        this.snrDb = snrDb;
+        this.packet = packet;
+        this.payload = payload;
+        this.onAirMs = onAirMs;
+        this.txPktPerS = txPktPerS;
+        this.rxPktPerS = rxPktPerS;
+        this.perPercent = perPercent;
+        this.rxQualityPercent = rxQualityPercent;
+        this.codeRate = codeRate;
+        this.preambleLength = preambleLength;
+        this.lowDataRateOpt = lowDataRateOpt;
+        this.crcEnabled = crcEnabled;
+        this.payloadLengthBytes = payloadLengthBytes;
+        this.txTimeoutMs = txTimeoutMs;
+        this.packetReceive = packetReceive;
+        this.packetTotal = packetTotal;
+        this.packetError = packetError;
+        this.crcError = crcError;
+        this.preambleDetected = preambleDetected;
+        this.headerValid = headerValid;
+        this.extraFields = extraFields != null ? extraFields : Map.of();
+    }
+
+    public static RadioSnapshot empty() {
+        return new RadioSnapshot(null, null, null, null, null, null, null, null,
+                null, null, null, null, null, null, null,
+                null, null, null, null, null, null, null, null, null, null, null, null,
+                Map.of());
+    }
+
+    public static RadioSnapshot fromMeta(String metaJson, String roleFallback, Double rssiFallback) {
+        if (metaJson == null || metaJson.isBlank()) {
+            RadioSnapshot snap = empty();
+            if (roleFallback != null || rssiFallback != null) {
+                return new RadioSnapshot(roleFallback, null, null, null, null, null,
+                        rssiFallback, null, null, null, null, null, null, null, null,
+                        null, null, null, null, null, null, null, null, null, null, null, null,
+                        Map.of());
+            }
+            return snap;
+        }
+        try {
+            JsonObject o = JsonParser.parseString(metaJson).getAsJsonObject();
+            String role = text(o, "role");
+            if (role == null) {
+                role = roleFallback;
+            }
+            Double rssi = dbl(o, "rssi_dbm");
+            if (rssi == null) {
+                rssi = rssiFallback;
+            }
+            Map<String, String> extra = new LinkedHashMap<>();
+            JsonElement fieldsEl = o.get("fields");
+            if (fieldsEl != null && fieldsEl.isJsonObject()) {
+                for (Map.Entry<String, JsonElement> e : fieldsEl.getAsJsonObject().entrySet()) {
+                    String label = e.getKey();
+                    if (isKnownFieldLabel(label)) {
+                        continue;
+                    }
+                    extra.put(label, e.getValue().getAsString());
+                }
+            }
+            return new RadioSnapshot(
+                    role,
+                    text(o, "frame"),
+                    hzToMhz(lng(o, "frequency_hz")),
+                    integer(o, "spreading_factor"),
+                    dbl(o, "bandwidth_khz"),
+                    dbl(o, "power_dbm"),
+                    rssi,
+                    dbl(o, "snr_db"),
+                    integer(o, "packet"),
+                    text(o, "payload"),
+                    dbl(o, "on_air_ms"),
+                    dbl(o, "tx_pkt_per_s"),
+                    dbl(o, "rx_pkt_per_s"),
+                    dbl(o, "per_percent"),
+                    dbl(o, "rx_quality_percent"),
+                    text(o, "code_rate"),
+                    integer(o, "preamble_length"),
+                    text(o, "low_data_rate_opt"),
+                    bool(o, "crc_enabled"),
+                    integer(o, "payload_length_bytes"),
+                    dbl(o, "tx_timeout_ms"),
+                    integer(o, "packet_receive"),
+                    integer(o, "packet_total"),
+                    integer(o, "packet_error"),
+                    integer(o, "crc_error"),
+                    integer(o, "preamble_detected"),
+                    integer(o, "header_valid"),
+                    extra
+            );
+        } catch (Exception ignored) {
+            return new RadioSnapshot(roleFallback, null, null, null, null, null,
+                    rssiFallback, null, null, null, null, null, null, null, null,
+                    null, null, null, null, null, null, null, null, null, null, null, null,
+                    Map.of());
+        }
+    }
+
+    public static RadioSnapshot fromExtracted(StatsExtractor.ExtractedStats stats) {
+        if (stats == null) {
+            return empty();
+        }
+        return fromMeta(stats.metaJson, stats.role, stats.rssiDbm != null ? stats.rssiDbm : stats.rssi);
+    }
+
+    public Set<String> diff(RadioSnapshot prev) {
+        Set<String> changed = new HashSet<>();
+        if (prev == null) {
+            return changed;
+        }
+        cmp(changed, "role", role, prev.role);
+        cmp(changed, "rssi", rssiDbm, prev.rssiDbm);
+        cmp(changed, "snr", snrDb, prev.snrDb);
+        cmp(changed, "packet", packet, prev.packet);
+        cmp(changed, "payload", payload, prev.payload);
+        cmp(changed, "per", perPercent, prev.perPercent);
+        cmp(changed, "rxQuality", rxQualityPercent, prev.rxQualityPercent);
+        cmp(changed, "txSpeed", txPktPerS, prev.txPktPerS);
+        cmp(changed, "rxSpeed", rxPktPerS, prev.rxPktPerS);
+        cmp(changed, "frequency", frequencyMhz, prev.frequencyMhz);
+        cmp(changed, "sf", sf, prev.sf);
+        cmp(changed, "bw", bwKhz, prev.bwKhz);
+        cmp(changed, "power", powerDbm, prev.powerDbm);
+        cmp(changed, "packetReceive", packetReceive, prev.packetReceive);
+        cmp(changed, "packetTotal", packetTotal, prev.packetTotal);
+        cmp(changed, "packetError", packetError, prev.packetError);
+        cmp(changed, "crcError", crcError, prev.crcError);
+        cmp(changed, "preambleDetected", preambleDetected, prev.preambleDetected);
+        cmp(changed, "headerValid", headerValid, prev.headerValid);
+        cmp(changed, "codeRate", codeRate, prev.codeRate);
+        cmp(changed, "crc", crcEnabled, prev.crcEnabled);
+        return changed;
+    }
+
+    private static void cmp(Set<String> changed, String key, Object a, Object b) {
+        if (!Objects.equals(a, b)) {
+            changed.add(key);
+        }
+    }
+
+    private static boolean isKnownFieldLabel(String label) {
+        String n = label.toLowerCase(Locale.ROOT).trim();
+        return n.equals("send") || n.equals("receive")
+                || n.contains("frequency") || n.equals("power") || n.equals("rssi")
+                || n.equals("snr") || n.contains("spreading") || n.contains("bandwidth")
+                || n.equals("packet") || n.contains("packet number") || n.equals("payload")
+                || n.contains("packet receive") || n.contains("packet total") || n.contains("packet error")
+                || n.contains("crc error") || n.contains("preamble detected") || n.contains("header valid")
+                || n.contains("on air") || n.contains("tx speed") || n.contains("rx speed")
+                || n.equals("per") || n.contains("rx quality") || n.contains("tx timeout")
+                || n.contains("code rate") || n.contains("preamble length")
+                || n.contains("low data rate") || n.equals("crc") || n.contains("payload length");
+    }
+
+    private static String text(JsonObject o, String key) {
+        JsonElement e = o.get(key);
+        return e != null && !e.isJsonNull() ? e.getAsString() : null;
+    }
+
+    private static Integer integer(JsonObject o, String key) {
+        JsonElement e = o.get(key);
+        return e != null && e.isJsonPrimitive() ? e.getAsInt() : null;
+    }
+
+    private static Double dbl(JsonObject o, String key) {
+        JsonElement e = o.get(key);
+        return e != null && e.isJsonPrimitive() ? e.getAsDouble() : null;
+    }
+
+    private static Boolean bool(JsonObject o, String key) {
+        JsonElement e = o.get(key);
+        return e != null && e.isJsonPrimitive() ? e.getAsBoolean() : null;
+    }
+
+    private static Long lng(JsonObject o, String key) {
+        JsonElement e = o.get(key);
+        return e != null && e.isJsonPrimitive() ? e.getAsLong() : null;
+    }
+
+    private static Double hzToMhz(Long hz) {
+        if (hz == null) {
+            return null;
+        }
+        return hz / 1_000_000.0;
+    }
+}

app/src/main/java/com/grigowashere/loratester/net/NetworkMonitor.java

@@ -0,0 +1,114 @@
+package com.grigowashere.loratester.net;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkRequest;
+import android.os.Build;
+
+import androidx.annotation.NonNull;
+
+import java.util.concurrent.CopyOnWriteArrayList;
+
+/** Observes validated internet connectivity. */
+public class NetworkMonitor {
+
+    public interface Listener {
+        void onConnectivityChanged(boolean online);
+    }
+
+    private final ConnectivityManager connectivityManager;
+    private final CopyOnWriteArrayList<Listener> listeners = new CopyOnWriteArrayList<>();
+    private volatile boolean online;
+    private ConnectivityManager.NetworkCallback networkCallback;
+
+    public NetworkMonitor(@NonNull Context context) {
+        connectivityManager =
+                (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        online = checkOnline();
+    }
+
+    public boolean isOnline() {
+        return online;
+    }
+
+    public void addListener(@NonNull Listener listener) {
+        listeners.add(listener);
+        listener.onConnectivityChanged(online);
+    }
+
+    public void removeListener(@NonNull Listener listener) {
+        listeners.remove(listener);
+    }
+
+    public void start() {
+        if (networkCallback != null || connectivityManager == null) {
+            return;
+        }
+        networkCallback = new ConnectivityManager.NetworkCallback() {
+            @Override
+            public void onAvailable(@NonNull Network network) {
+                updateState();
+            }
+
+            @Override
+            public void onLost(@NonNull Network network) {
+                updateState();
+            }
+
+            @Override
+            public void onCapabilitiesChanged(
+                    @NonNull Network network,
+                    @NonNull NetworkCapabilities caps
+            ) {
+                updateState();
+            }
+        };
+        NetworkRequest request = new NetworkRequest.Builder()
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+                .build();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            connectivityManager.registerDefaultNetworkCallback(networkCallback);
+        } else {
+            connectivityManager.registerNetworkCallback(request, networkCallback);
+        }
+        updateState();
+    }
+
+    public void stop() {
+        if (networkCallback != null && connectivityManager != null) {
+            try {
+                connectivityManager.unregisterNetworkCallback(networkCallback);
+            } catch (Exception ignored) {
+                // ignore
+            }
+            networkCallback = null;
+        }
+    }
+
+    private void updateState() {
+        boolean now = checkOnline();
+        if (now == online) {
+            return;
+        }
+        online = now;
+        for (Listener l : listeners) {
+            l.onConnectivityChanged(online);
+        }
+    }
+
+    private boolean checkOnline() {
+        if (connectivityManager == null) {
+            return false;
+        }
+        Network network = connectivityManager.getActiveNetwork();
+        if (network == null) {
+            return false;
+        }
+        NetworkCapabilities caps = connectivityManager.getNetworkCapabilities(network);
+        return caps != null
+                && caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+                && caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED);
+    }
+}

app/src/main/java/com/grigowashere/loratester/telnet/AtCommandFormatter.java

@@ -0,0 +1,41 @@
+package com.grigowashere.loratester.telnet;
+
+import java.nio.charset.StandardCharsets;
+
+/** Formats user input as an AT command line for serial/telnet bridges. */
+public final class AtCommandFormatter {
+
+    private AtCommandFormatter() {
+    }
+
+    public static String normalize(String input) {
+        if (input == null) {
+            return "";
+        }
+        String line = input.trim();
+        if (line.isEmpty()) {
+            return "";
+        }
+        if (!line.regionMatches(true, 0, "AT", 0, 2)) {
+            line = "AT" + line;
+        }
+        return line;
+    }
+
+    public static byte[] toWireBytes(String input) {
+        String line = normalize(input);
+        if (line.isEmpty()) {
+            return new byte[0];
+        }
+        String wire = line + "\r\n";
+        return wire.getBytes(StandardCharsets.UTF_8);
+    }
+
+    /** Literal line (e.g. screen reset "S") without AT prefix. */
+    public static byte[] toWireBytesLiteral(String line) {
+        if (line == null || line.isEmpty()) {
+            return new byte[0];
+        }
+        return (line + "\r\n").getBytes(StandardCharsets.UTF_8);
+    }
+}

app/src/main/java/com/grigowashere/loratester/telnet/AtCommands.java

@@ -0,0 +1,33 @@
+package com.grigowashere.loratester.telnet;
+
+/** LoRa module AT commands (telnet bridge). */
+public final class AtCommands {
+
+    public static final String TRANSMIT = "AT+TX";
+    public static final String RECEIVE = "AT+RX";
+    /** Stop TX or RX test. */
+    public static final String STOP = "S";
+    public static final String TIMEOUT_MS = "AT+TM=";
+    public static final String FREQUENCY_HZ = "AT+FQ=";
+    public static final String POWER_DBM = "AT+PW=";
+    public static final String SPREADING_FACTOR = "AT+SF=";
+    public static final String BANDWIDTH = "AT+BW=";
+    public static final String CODE_RATE = "AT+CR=";
+    public static final String PREAMBLE = "AT+PL=";
+
+    /** Legacy / bridge helpers (if supported by firmware). */
+    public static final String HELP = "AT+H";
+    public static final String STATUS = "AT+STATUS";
+    public static final String RESET = "AT+RESET";
+    public static final String BASIC = "AT";
+
+    public static final String[] BW_KHZ = {
+            "7.81", "10.42", "15.63", "20.83", "31.25",
+            "41.67", "62.5", "125", "250", "500"
+    };
+
+    public static final String[] CODE_RATES = {"4/5", "4/6", "4/7", "4/8"};
+
+    private AtCommands() {
+    }
+}

app/src/main/java/com/grigowashere/loratester/telnet/LoraStatsFormatter.java

@@ -0,0 +1,144 @@
+package com.grigowashere.loratester.telnet;
+
+import com.grigowashere.loratester.model.RadioSnapshot;
+
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+
+public final class LoraStatsFormatter {
+
+    private LoraStatsFormatter() {
+    }
+
+    @Deprecated
+    public static String formatMeta(String metaJson) {
+        RadioSnapshot snap = RadioSnapshot.fromMeta(metaJson, null, null);
+        StringBuilder sb = new StringBuilder();
+        String dynamic = formatDynamic(snap, Set.of());
+        if (!dynamic.isEmpty()) {
+            sb.append(dynamic);
+        }
+        String stat = formatStatic(snap, Set.of());
+        if (!stat.isEmpty()) {
+            if (sb.length() > 0) {
+                sb.append("\n");
+            }
+            sb.append(stat);
+        }
+        return sb.toString().trim();
+    }
+
+    public static String formatDynamic(RadioSnapshot s, Set<String> changed) {
+        if (s == null) {
+            return "";
+        }
+        StringBuilder sb = new StringBuilder();
+        appendLine(sb, "RSSI", fmtDbm(s.rssiDbm), "rssi", changed);
+        appendLine(sb, "SNR", fmtSuffix(s.snrDb, " dB"), "snr", changed);
+        appendLine(sb, "RX Quality", fmtSuffix(s.rxQualityPercent, " %"), "rxQuality", changed);
+        appendLine(sb, "Пакет", fmtInt(s.packet), "packet", changed);
+        appendLine(sb, "Payload", s.payload, "payload", changed);
+        appendLine(sb, "PER", fmtSuffix(s.perPercent, " %"), "per", changed);
+        appendLine(sb, "Принято", fmtInt(s.packetReceive), "packetReceive", changed);
+        appendLine(sb, "Всего пакетов", fmtInt(s.packetTotal), "packetTotal", changed);
+        appendLine(sb, "Ошибки пакетов", fmtInt(s.packetError), "packetError", changed);
+        appendLine(sb, "CRC Error", fmtInt(s.crcError), "crcError", changed);
+        appendLine(sb, "Preamble Det.", fmtInt(s.preambleDetected), "preambleDetected", changed);
+        appendLine(sb, "Header Valid", fmtInt(s.headerValid), "headerValid", changed);
+        appendLine(sb, "TX Speed", fmtSuffix(s.txPktPerS, " pkt/s"), "txSpeed", changed);
+        appendLine(sb, "RX Speed", fmtSuffix(s.rxPktPerS, " pkt/s"), "rxSpeed", changed);
+        for (Map.Entry<String, String> e : s.extraFields.entrySet()) {
+            append(sb, e.getKey(), e.getValue());
+        }
+        return sb.toString().trim();
+    }
+
+    public static String formatStatic(RadioSnapshot s, Set<String> changed) {
+        if (s == null) {
+            return "";
+        }
+        StringBuilder sb = new StringBuilder();
+        if (s.role != null) {
+            appendLine(sb, "Роль", roleLabel(s.role), "role", changed);
+        }
+        appendLine(sb, "Частота", fmtSuffix(s.frequencyMhz, " MHz"), "frequency", changed);
+        appendLine(sb, "SF", fmtInt(s.sf), "sf", changed);
+        appendLine(sb, "BW", fmtBw(s.bwKhz), "bw", changed);
+        appendLine(sb, "Мощность TX", fmtDbm(s.powerDbm), "power", changed);
+        appendLine(sb, "Code Rate", s.codeRate, "codeRate", changed);
+        appendLine(sb, "Preamble Len", fmtInt(s.preambleLength), "preambleLength", changed);
+        appendLine(sb, "Low DR Opt", s.lowDataRateOpt, "lowDataRateOpt", changed);
+        appendLine(sb, "CRC", fmtCrc(s.crcEnabled), "crc", changed);
+        appendLine(sb, "Payload len", fmtSuffix(s.payloadLengthBytes, " byte"), "payloadLength", changed);
+        appendLine(sb, "TX Timeout", fmtSuffix(s.txTimeoutMs, " ms"), "txTimeout", changed);
+        appendLine(sb, "On Air", fmtSuffix(s.onAirMs, " ms"), "onAir", changed);
+        return sb.toString().trim();
+    }
+
+    public static String roleLabel(String role) {
+        if (StatsExtractor.ROLE_TX.equals(role)) {
+            return "Передатчик (TX)";
+        }
+        if (StatsExtractor.ROLE_RX.equals(role)) {
+            return "Приёмник (RX)";
+        }
+        return role;
+    }
+
+    private static void appendLine(
+            StringBuilder sb,
+            String label,
+            String value,
+            String changeKey,
+            Set<String> changed
+    ) {
+        if (value == null || value.isEmpty()) {
+            return;
+        }
+        if (sb.length() > 0) {
+            sb.append("\n");
+        }
+        if (changed != null && changed.contains(changeKey)) {
+            sb.append("▸ ");
+        }
+        sb.append(label).append(": ").append(value);
+    }
+
+    private static void append(StringBuilder sb, String label, String value) {
+        if (value == null || value.isEmpty()) {
+            return;
+        }
+        if (sb.length() > 0) {
+            sb.append("\n");
+        }
+        sb.append(label).append(": ").append(value);
+    }
+
+    private static String fmtDbm(Double v) {
+        return v != null ? String.format(Locale.US, "%.0f dBm", v) : null;
+    }
+
+    private static String fmtInt(Integer v) {
+        return v != null ? String.valueOf(v) : null;
+    }
+
+    private static String fmtBw(Double v) {
+        return v != null ? String.format(Locale.US, "%.2f kHz", v) : null;
+    }
+
+    private static String fmtCrc(Boolean enabled) {
+        if (enabled == null) {
+            return null;
+        }
+        return enabled ? "On" : "Off";
+    }
+
+    private static String fmtSuffix(Integer v, String suffix) {
+        return v != null ? v + suffix : null;
+    }
+
+    private static String fmtSuffix(Double v, String suffix) {
+        return v != null ? String.format(Locale.US, "%s%s", v, suffix) : null;
+    }
+}

app/src/main/java/com/grigowashere/loratester/telnet/RadioMacroBuilder.java

@@ -0,0 +1,74 @@
+package com.grigowashere.loratester.telnet;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** Builds macro: S (stop) then configuration AT commands, then TX/RX if requested. */
+public final class RadioMacroBuilder {
+
+    /** Stop TX or RX before applying new settings. */
+    public static final String STOP = AtCommands.STOP;
+
+    /** @deprecated use {@link #STOP} */
+    @Deprecated
+    public static final String SCREEN_RESET = STOP;
+
+    public static final class Params {
+        public Long frequencyHz;
+        public Integer powerDbm;
+        public Integer sf;
+        public String bwKhz;
+        public String codeRate;
+        public Integer preamble;
+        public Integer sendTimeoutMs;
+        public String role;
+    }
+
+    private RadioMacroBuilder() {
+    }
+
+    public static List<String> apply(Integer sf, Integer bwKhz, String role) {
+        Params p = new Params();
+        p.sf = sf;
+        if (bwKhz != null) {
+            p.bwKhz = String.valueOf(bwKhz);
+        }
+        p.role = role;
+        return apply(p);
+    }
+
+    public static List<String> apply(Params p) {
+        List<String> lines = new ArrayList<>();
+        lines.add(STOP);
+        if (p == null) {
+            return lines;
+        }
+        if (p.frequencyHz != null && p.frequencyHz >= 430_000_000L && p.frequencyHz <= 470_000_000L) {
+            lines.add(AtCommands.FREQUENCY_HZ + p.frequencyHz);
+        }
+        if (p.powerDbm != null && p.powerDbm >= -9 && p.powerDbm <= 22) {
+            lines.add(AtCommands.POWER_DBM + p.powerDbm);
+        }
+        if (p.sf != null && p.sf >= 5 && p.sf <= 12) {
+            lines.add(AtCommands.SPREADING_FACTOR + p.sf);
+        }
+        if (p.bwKhz != null && !p.bwKhz.isBlank()) {
+            lines.add(AtCommands.BANDWIDTH + p.bwKhz.trim());
+        }
+        if (p.codeRate != null && !p.codeRate.isBlank()) {
+            lines.add(AtCommands.CODE_RATE + p.codeRate.trim());
+        }
+        if (p.preamble != null && p.preamble >= 1 && p.preamble <= 64) {
+            lines.add(AtCommands.PREAMBLE + p.preamble);
+        }
+        if (p.sendTimeoutMs != null && p.sendTimeoutMs >= 0 && p.sendTimeoutMs <= 60_000) {
+            lines.add(AtCommands.TIMEOUT_MS + p.sendTimeoutMs);
+        }
+        if (StatsExtractor.ROLE_TX.equals(p.role)) {
+            lines.add(AtCommands.TRANSMIT);
+        } else if (StatsExtractor.ROLE_RX.equals(p.role)) {
+            lines.add(AtCommands.RECEIVE);
+        }
+        return lines;
+    }
+}

app/src/main/java/com/grigowashere/loratester/telnet/StatsExtractor.java

@@ -0,0 +1,332 @@
+package com.grigowashere.loratester.telnet;
+
+import com.google.gson.Gson;
+
+import java.util.LinkedHashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Label-based regex parsing — order and count of fields may change on the device.
+ */
+public class StatsExtractor {
+
+    public static final String ROLE_TX = "TX";
+    public static final String ROLE_RX = "RX";
+
+    private static final Gson GSON = new Gson();
+
+    private static final Pattern FRAME_SEND = Pattern.compile("(?m)^\\s*SEND\\b");
+    private static final Pattern FRAME_RECEIVE = Pattern.compile("(?m)^\\s*RECEIVE\\b");
+    private static final Pattern POWER = Pattern.compile("Power\\s*:\\s*(\\d+(?:\\.\\d+)?)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern RSSI = Pattern.compile("RSSI\\s*:\\s*(-?\\d+(?:\\.\\d+)?)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern SNR = Pattern.compile("SNR\\s*:\\s*(-?\\d+(?:\\.\\d+)?)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern FREQUENCY = Pattern.compile("Frequency\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern SPREADING = Pattern.compile("Spreading Factor\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern BANDWIDTH = Pattern.compile("Bandwidth\\s*:\\s*([\\d.]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PACKET_TX = Pattern.compile("(?m)^\\s*Packet\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PACKET_NUMBER = Pattern.compile("Packet Number\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PACKET_RECEIVE = Pattern.compile("Packet Receive\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PACKET_TOTAL = Pattern.compile("Packet Total\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PACKET_ERROR = Pattern.compile("Packet Error\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern CRC_ERROR = Pattern.compile("CRC Error\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PREAMBLE_DETECTED = Pattern.compile(
+            "Preamble Detected\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern HEADER_VALID = Pattern.compile("Header Valid\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern CODE_RATE = Pattern.compile("Code Rate\\s*:\\s*(\\S+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PREAMBLE_LENGTH = Pattern.compile(
+            "Preamble Length\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern LOW_DATA_RATE = Pattern.compile(
+            "Low Data Rate Opt\\s*:\\s*(\\S+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern CRC = Pattern.compile("CRC\\s*:\\s*(On|Off)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PAYLOAD_LENGTH = Pattern.compile(
+            "Payload length\\s*:\\s*(\\d+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern TX_TIMEOUT = Pattern.compile(
+            "TX Timeout\\s*:\\s*([\\d.]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PAYLOAD = Pattern.compile("Payload\\s*:\\s*(.+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern ON_AIR = Pattern.compile("On Air\\s*:\\s*([\\d.]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern TX_SPEED = Pattern.compile("TX Speed\\s*:\\s*([\\d.]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern RX_SPEED = Pattern.compile("RX Speed\\s*:\\s*([\\d.]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern PER = Pattern.compile("PER\\s*:\\s*([\\d.]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern RX_QUALITY = Pattern.compile(
+            "RX Quality\\s*:\\s*([\\d.]+)", Pattern.CASE_INSENSITIVE);
+
+    private final Pattern rssiPattern;
+    private final Pattern rangePattern;
+
+    public StatsExtractor(String rssiRegex, String rangeRegex) {
+        this.rssiPattern = Pattern.compile(rssiRegex, Pattern.CASE_INSENSITIVE);
+        this.rangePattern = Pattern.compile(rangeRegex, Pattern.CASE_INSENSITIVE);
+    }
+
+    public static StatsExtractor withDefaults() {
+        return new StatsExtractor(
+                "RSSI\\s*:\\s*(-?\\d+(?:\\.\\d+)?)",
+                "range\\s*:\\s*([\\d.]+)"
+        );
+    }
+
+    public ExtractedStats extract(String frame) {
+        if (frame == null || frame.isBlank()) {
+            return empty(frame);
+        }
+
+        String normalized = TelnetText.normalize(frame);
+
+        Map<String, Object> meta = new LinkedHashMap<>();
+        Map<String, String> fields = new LinkedHashMap<>();
+        collectLabeledLines(normalized, fields);
+
+        String frameType = detectFrameType(normalized);
+        String role = frameTypeToRole(frameType);
+        if (frameType != null) {
+            meta.put("frame", frameType);
+        }
+        if (role != null) {
+            meta.put("role", role);
+        }
+        Double rssiDbm = firstDouble(RSSI, normalized);
+        if (rssiDbm == null) {
+            rssiDbm = matchDouble(rssiPattern, normalized);
+        }
+        Double txPower = matchDouble(POWER, normalized);
+        Double snrDb = matchDouble(SNR, normalized);
+
+        if (rssiDbm != null) {
+            meta.put("rssi_dbm", rssiDbm);
+        }
+        if (txPower != null) {
+            meta.put("power_dbm", txPower);
+        }
+        if (snrDb != null) {
+            meta.put("snr_db", snrDb);
+        }
+
+        putLong(meta, "frequency_hz", matchLong(FREQUENCY, normalized));
+        putInt(meta, "spreading_factor", matchInt(SPREADING, normalized));
+        putDouble(meta, "bandwidth_khz", matchDouble(BANDWIDTH, normalized));
+        Integer packet = matchInt(PACKET_NUMBER, normalized);
+        if (packet == null) {
+            packet = matchInt(PACKET_TX, normalized);
+        }
+        putInt(meta, "packet", packet);
+        putString(meta, "payload", matchString(PAYLOAD, normalized));
+        putDouble(meta, "on_air_ms", matchDouble(ON_AIR, normalized));
+        putDouble(meta, "tx_pkt_per_s", matchDouble(TX_SPEED, normalized));
+        putDouble(meta, "rx_pkt_per_s", matchDouble(RX_SPEED, normalized));
+        putDouble(meta, "per_percent", matchDouble(PER, normalized));
+        putDouble(meta, "rx_quality_percent", matchDouble(RX_QUALITY, normalized));
+        putString(meta, "code_rate", matchString(CODE_RATE, normalized));
+        putInt(meta, "preamble_length", matchInt(PREAMBLE_LENGTH, normalized));
+        putString(meta, "low_data_rate_opt", matchString(LOW_DATA_RATE, normalized));
+        putBool(meta, "crc_enabled", matchBool(CRC, normalized));
+        putInt(meta, "payload_length_bytes", matchInt(PAYLOAD_LENGTH, normalized));
+        putDouble(meta, "tx_timeout_ms", matchDouble(TX_TIMEOUT, normalized));
+        putInt(meta, "packet_receive", matchInt(PACKET_RECEIVE, normalized));
+        putInt(meta, "packet_total", matchInt(PACKET_TOTAL, normalized));
+        putInt(meta, "packet_error", matchInt(PACKET_ERROR, normalized));
+        putInt(meta, "crc_error", matchInt(CRC_ERROR, normalized));
+        putInt(meta, "preamble_detected", matchInt(PREAMBLE_DETECTED, normalized));
+        putInt(meta, "header_valid", matchInt(HEADER_VALID, normalized));
+
+        if (!fields.isEmpty()) {
+            meta.put("fields", fields);
+        }
+
+        meta.put("stats_at", System.currentTimeMillis() / 1000.0);
+
+        Double rangeM = matchDouble(rangePattern, normalized);
+        Double displayDbm = rssiDbm != null ? rssiDbm : txPower;
+
+        String metaJson = meta.isEmpty() ? null : GSON.toJson(meta);
+        return new ExtractedStats(
+                displayDbm, rangeM, frame, metaJson, frameType, role, txPower, rssiDbm, snrDb
+        );
+    }
+
+    private static void collectLabeledLines(String frame, Map<String, String> fields) {
+        for (String line : frame.split("\n")) {
+            String trimmed = line.trim();
+            if (trimmed.isEmpty()) {
+                continue;
+            }
+            int colon = trimmed.indexOf(':');
+            if (colon <= 0) {
+                continue;
+            }
+            String label = trimmed.substring(0, colon).trim();
+            String value = trimmed.substring(colon + 1).trim();
+            if (label.isEmpty()
+                    || label.equalsIgnoreCase("SEND")
+                    || label.equalsIgnoreCase("RECEIVE")
+                    || isStructuredLabel(label)) {
+                continue;
+            }
+            fields.put(label, value);
+        }
+    }
+
+    private static boolean isStructuredLabel(String label) {
+        String n = label.toLowerCase(Locale.ROOT).trim();
+        return n.equals("frequency") || n.equals("power") || n.equals("rssi")
+                || n.equals("snr") || n.contains("spreading factor") || n.equals("bandwidth")
+                || n.equals("packet") || n.contains("packet number") || n.equals("payload")
+                || n.contains("packet receive") || n.contains("packet total") || n.contains("packet error")
+                || n.contains("crc error") || n.contains("preamble detected") || n.contains("header valid")
+                || n.contains("on air") || n.contains("tx speed") || n.contains("rx speed")
+                || n.equals("per") || n.contains("rx quality") || n.contains("tx timeout")
+                || n.contains("code rate") || n.contains("preamble length")
+                || n.contains("low data rate") || n.equals("crc") || n.contains("payload length");
+    }
+
+    private static ExtractedStats empty(String frame) {
+        return new ExtractedStats(null, null, frame, null, null, null, null, null, null);
+    }
+
+    private static String detectFrameType(String frame) {
+        boolean send = FRAME_SEND.matcher(frame).find();
+        boolean recv = FRAME_RECEIVE.matcher(frame).find();
+        if (send && !recv) {
+            return "SEND";
+        }
+        if (recv && !send) {
+            return "RECEIVE";
+        }
+        if (send) {
+            return "SEND";
+        }
+        if (recv) {
+            return "RECEIVE";
+        }
+        return null;
+    }
+
+    private static String frameTypeToRole(String frameType) {
+        if ("SEND".equals(frameType)) {
+            return ROLE_TX;
+        }
+        if ("RECEIVE".equals(frameType)) {
+            return ROLE_RX;
+        }
+        return null;
+    }
+
+    private static Double firstDouble(Pattern pattern, String text) {
+        return matchDouble(pattern, text);
+    }
+
+    private static void putInt(Map<String, Object> meta, String key, Integer value) {
+        if (value != null) {
+            meta.put(key, value);
+        }
+    }
+
+    private static void putLong(Map<String, Object> meta, String key, Long value) {
+        if (value != null) {
+            meta.put(key, value);
+        }
+    }
+
+    private static void putDouble(Map<String, Object> meta, String key, Double value) {
+        if (value != null) {
+            meta.put(key, value);
+        }
+    }
+
+    private static void putString(Map<String, Object> meta, String key, String value) {
+        if (value != null && !value.isEmpty()) {
+            meta.put(key, value.trim());
+        }
+    }
+
+    private static void putBool(Map<String, Object> meta, String key, Boolean value) {
+        if (value != null) {
+            meta.put(key, value);
+        }
+    }
+
+    private static Boolean matchBool(Pattern pattern, String text) {
+        Matcher m = pattern.matcher(text);
+        if (!m.find()) {
+            return null;
+        }
+        return "on".equalsIgnoreCase(m.group(1).trim());
+    }
+
+    private static Double matchDouble(Pattern pattern, String text) {
+        Matcher m = pattern.matcher(text);
+        if (m.find()) {
+            try {
+                return Double.parseDouble(m.group(1).trim());
+            } catch (NumberFormatException ignored) {
+                return null;
+            }
+        }
+        return null;
+    }
+
+    private static Integer matchInt(Pattern pattern, String text) {
+        Long v = matchLong(pattern, text);
+        return v != null ? v.intValue() : null;
+    }
+
+    private static Long matchLong(Pattern pattern, String text) {
+        Matcher m = pattern.matcher(text);
+        if (m.find()) {
+            try {
+                return Long.parseLong(m.group(1).trim());
+            } catch (NumberFormatException ignored) {
+                return null;
+            }
+        }
+        return null;
+    }
+
+    private static String matchString(Pattern pattern, String text) {
+        Matcher m = pattern.matcher(text);
+        if (m.find()) {
+            return m.group(1).trim();
+        }
+        return null;
+    }
+
+    public static final class ExtractedStats {
+        public final Double rssi;
+        public final Double rangeM;
+        public final String rawFrame;
+        public final String metaJson;
+        public final String frameType;
+        public final String role;
+        public final Double txPowerDbm;
+        public final Double rssiDbm;
+        public final Double snrDb;
+
+        public boolean hasRadioFrame() {
+            return frameType != null;
+        }
+
+        public ExtractedStats(
+                Double rssi,
+                Double rangeM,
+                String rawFrame,
+                String metaJson,
+                String frameType,
+                String role,
+                Double txPowerDbm,
+                Double rssiDbm,
+                Double snrDb
+        ) {
+            this.rssi = rssi;
+            this.rangeM = rangeM;
+            this.rawFrame = rawFrame;
+            this.metaJson = metaJson;
+            this.frameType = frameType;
+            this.role = role;
+            this.txPowerDbm = txPowerDbm;
+            this.rssiDbm = rssiDbm;
+            this.snrDb = snrDb;
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/telnet/TelnetClient.java

@@ -0,0 +1,175 @@
+package com.grigowashere.loratester.telnet;
+
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+
+public class TelnetClient {
+
+    private static final String TAG = "TelnetClient";
+
+    public interface Listener {
+        void onConnected();
+
+        void onDisconnected();
+
+        void onBytes(byte[] data, int length);
+
+        void onError(String message);
+    }
+
+    public enum SendResult {
+        SENT,
+        NOT_CONNECTED,
+        EMPTY,
+        IO_ERROR
+    }
+
+    private final String host;
+    private final int port;
+    private final Listener listener;
+    private final AtomicBoolean running = new AtomicBoolean(false);
+    private final AtomicReference<Socket> activeSocket = new AtomicReference<>();
+    private final Object sendLock = new Object();
+    private Thread worker;
+
+    public TelnetClient(String host, int port, Listener listener) {
+        this.host = host;
+        this.port = port;
+        this.listener = listener;
+    }
+
+    public void start() {
+        if (running.getAndSet(true)) {
+            return;
+        }
+        worker = new Thread(this::runLoop, "TelnetClient");
+        worker.setDaemon(true);
+        worker.start();
+    }
+
+    public void stop() {
+        running.set(false);
+        closeActiveSocket();
+        if (worker != null) {
+            worker.interrupt();
+        }
+    }
+
+    public boolean isRunning() {
+        return running.get();
+    }
+
+    public boolean isConnected() {
+        Socket s = activeSocket.get();
+        return s != null && s.isConnected() && !s.isClosed();
+    }
+
+    /**
+     * Sends an AT command. Adds AT prefix and CR+LF if missing.
+     */
+    public SendResult sendRawLine(String line) {
+        byte[] wire = AtCommandFormatter.toWireBytesLiteral(line);
+        if (wire.length == 0) {
+            return SendResult.EMPTY;
+        }
+        return writeWire(wire);
+    }
+
+    public SendResult sendAtCommand(String command) {
+        byte[] wire = AtCommandFormatter.toWireBytes(command);
+        if (wire.length == 0) {
+            return SendResult.EMPTY;
+        }
+        return writeWire(wire);
+    }
+
+    private SendResult writeWire(byte[] wire) {
+        Socket socket = activeSocket.get();
+        if (socket == null || socket.isClosed()) {
+            return SendResult.NOT_CONNECTED;
+        }
+        synchronized (sendLock) {
+            try {
+                OutputStream out = socket.getOutputStream();
+                out.write(wire);
+                out.flush();
+                return SendResult.SENT;
+            } catch (IOException e) {
+                Log.e(TAG, "send failed", e);
+                return SendResult.IO_ERROR;
+            }
+        }
+    }
+
+    private void runLoop() {
+        int backoffMs = 1000;
+        while (running.get()) {
+            Socket socket = null;
+            try {
+                socket = new Socket();
+                socket.connect(new InetSocketAddress(host, port), 5000);
+                socket.setTcpNoDelay(true);
+                activeSocket.set(socket);
+                listener.onConnected();
+                backoffMs = 1000;
+                readStream(socket);
+            } catch (IOException e) {
+                if (running.get()) {
+                    listener.onError(e.getMessage());
+                }
+            } finally {
+                activeSocket.compareAndSet(socket, null);
+                listener.onDisconnected();
+                if (socket != null) {
+                    try {
+                        socket.close();
+                    } catch (IOException ignored) {
+                    }
+                }
+            }
+            if (!running.get()) {
+                break;
+            }
+            try {
+                Thread.sleep(backoffMs);
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+                break;
+            }
+            backoffMs = Math.min(backoffMs * 2, 15000);
+        }
+    }
+
+    private void closeActiveSocket() {
+        Socket s = activeSocket.getAndSet(null);
+        if (s != null) {
+            try {
+                s.close();
+            } catch (IOException ignored) {
+            }
+        }
+    }
+
+    private void readStream(Socket socket) throws IOException {
+        InputStream in = socket.getInputStream();
+        byte[] buf = new byte[4096];
+        while (running.get()) {
+            int n = in.read(buf);
+            if (n < 0) {
+                break;
+            }
+            if (n > 0) {
+                byte[] chunk = new byte[n];
+                System.arraycopy(buf, 0, chunk, 0, n);
+                listener.onBytes(chunk, n);
+            }
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/telnet/TelnetFrameParser.java

@@ -0,0 +1,200 @@
+package com.grigowashere.loratester.telnet;
+
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Splits telnet stream into LoRa screen frames by ESC clear and/or SEND/RECEIVE headers.
+ */
+public class TelnetFrameParser {
+
+    public interface FrameListener {
+        void onFrame(String text);
+    }
+
+    private static final Charset CHARSET = StandardCharsets.UTF_8;
+    /** Start of a new radio screen (TX or RX). */
+    private static final Pattern FRAME_HEADER =
+            Pattern.compile("(?m)^\\s*(SEND|RECEIVE)\\b");
+
+    private final List<byte[]> delimiters;
+    private final FrameListener listener;
+    private final byte[] buffer = new byte[65536];
+    private int bufferLen;
+
+    public TelnetFrameParser(FrameListener listener) {
+        this(listener, defaultDelimiters());
+    }
+
+    public TelnetFrameParser(FrameListener listener, List<byte[]> delimiters) {
+        this.listener = listener;
+        this.delimiters = new ArrayList<>(delimiters);
+    }
+
+    public static List<byte[]> defaultDelimiters() {
+        return Arrays.asList(
+                new byte[] {0x1b, '[', '2', 'J'},
+                new byte[] {0x1b, '[', 'H'},
+                new byte[] {0x0c}
+        );
+    }
+
+    public void append(byte[] chunk, int offset, int length) {
+        if (length <= 0) {
+            return;
+        }
+        int splitAt = findEarliestDelimiter(chunk, offset, length);
+        if (splitAt < 0) {
+            appendToBuffer(chunk, offset, length);
+            tryEmitByHeaders();
+            return;
+        }
+        appendToBuffer(chunk, offset, splitAt - offset);
+        emitFrame();
+        clearBuffer();
+        int delimLen = delimiterLengthAt(chunk, splitAt, offset, length);
+        int tailOffset = splitAt + delimLen;
+        int tailLen = offset + length - tailOffset;
+        append(chunk, tailOffset, tailLen);
+        tryEmitByHeaders();
+    }
+
+    public void append(byte[] chunk) {
+        append(chunk, 0, chunk.length);
+    }
+
+    public void flush() {
+        tryEmitByHeaders();
+        if (bufferLen > 0) {
+            emitFrame();
+            clearBuffer();
+        }
+    }
+
+    /**
+     * Emit latest SEND/RECEIVE screen from buffer (in-place refresh without ESC).
+     * Does not clear the buffer.
+     */
+    public void emitSnapshot() {
+        if (bufferLen == 0) {
+            return;
+        }
+        String text = TelnetText.normalize(bufferText());
+        Matcher m = FRAME_HEADER.matcher(text);
+        int lastStart = -1;
+        while (m.find()) {
+            lastStart = m.start();
+        }
+        if (lastStart < 0) {
+            return;
+        }
+        String frame = text.substring(lastStart).trim();
+        if (!frame.isEmpty()) {
+            listener.onFrame(frame);
+        }
+    }
+
+    /** Emit all complete frames when buffer holds multiple SEND/RECEIVE blocks. */
+    private void tryEmitByHeaders() {
+        if (bufferLen == 0) {
+            return;
+        }
+        String text = bufferText();
+        Matcher m = FRAME_HEADER.matcher(text);
+        List<Integer> starts = new ArrayList<>();
+        while (m.find()) {
+            starts.add(m.start());
+        }
+        if (starts.size() < 2) {
+            return;
+        }
+        for (int i = 0; i < starts.size() - 1; i++) {
+            String frame = text.substring(starts.get(i), starts.get(i + 1)).trim();
+            if (!frame.isEmpty()) {
+                listener.onFrame(frame);
+            }
+        }
+        String tail = text.substring(starts.get(starts.size() - 1));
+        clearBuffer();
+        byte[] tailBytes = tail.getBytes(CHARSET);
+        appendToBuffer(tailBytes, 0, tailBytes.length);
+    }
+
+    private String bufferText() {
+        return new String(buffer, 0, bufferLen, CHARSET);
+    }
+
+    private void emitFrame() {
+        if (bufferLen == 0) {
+            return;
+        }
+        String text = bufferText().trim();
+        if (!text.isEmpty()) {
+            listener.onFrame(text);
+        }
+    }
+
+    private void clearBuffer() {
+        bufferLen = 0;
+    }
+
+    private void appendToBuffer(byte[] src, int offset, int length) {
+        if (length <= 0) {
+            return;
+        }
+        if (bufferLen + length > buffer.length) {
+            tryEmitByHeaders();
+            if (bufferLen + length > buffer.length) {
+                emitFrame();
+                clearBuffer();
+            }
+        }
+        System.arraycopy(src, offset, buffer, bufferLen, length);
+        bufferLen += length;
+    }
+
+    private int findEarliestDelimiter(byte[] chunk, int offset, int length) {
+        int best = -1;
+        for (byte[] delim : delimiters) {
+            int idx = indexOf(chunk, offset, length, delim);
+            if (idx >= 0 && (best < 0 || idx < best)) {
+                best = idx;
+            }
+        }
+        return best;
+    }
+
+    private int delimiterLengthAt(byte[] chunk, int pos, int offset, int length) {
+        int end = offset + length;
+        for (byte[] delim : delimiters) {
+            if (pos + delim.length <= end && matchesAt(chunk, pos, delim)) {
+                return delim.length;
+            }
+        }
+        return 0;
+    }
+
+    private static int indexOf(byte[] haystack, int offset, int length, byte[] needle) {
+        int end = offset + length - needle.length;
+        for (int i = offset; i <= end; i++) {
+            if (matchesAt(haystack, i, needle)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    private static boolean matchesAt(byte[] haystack, int pos, byte[] needle) {
+        for (int i = 0; i < needle.length; i++) {
+            if (haystack[pos + i] != needle[i]) {
+                return false;
+            }
+        }
+        return true;
+    }
+}

app/src/main/java/com/grigowashere/loratester/telnet/TelnetText.java

@@ -0,0 +1,24 @@
+package com.grigowashere.loratester.telnet;
+
+import java.util.regex.Pattern;
+
+/** Cleans telnet screen text before field extraction. */
+public final class TelnetText {
+
+    private static final Pattern ANSI = Pattern.compile(
+            "\u001b\\[[0-9;?]*[ -/]*[@-~]|\u001b\\].*?\u0007|\u001b[@-Z\\\\-_]"
+    );
+
+    private TelnetText() {
+    }
+
+    public static String normalize(String text) {
+        if (text == null || text.isEmpty()) {
+            return "";
+        }
+        String s = ANSI.matcher(text).replaceAll("");
+        s = s.replace('\r', '\n');
+        s = s.replace("\u000c", "\n");
+        return s;
+    }
+}

app/src/main/java/com/grigowashere/loratester/track/TrackRecorder.java

@@ -0,0 +1,274 @@
+package com.grigowashere.loratester.track;
+
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+
+import com.grigowashere.loratester.TelemetryUploader;
+import com.grigowashere.loratester.api.ServerApi;
+import com.grigowashere.loratester.location.GeoUtils;
+import com.grigowashere.loratester.net.NetworkMonitor;
+import com.grigowashere.loratester.telnet.StatsExtractor;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+public class TrackRecorder {
+
+    private static final String TAG = "TrackRecorder";
+    private static final long SAMPLE_MS = 1000;
+    private static final long FLUSH_MS = 30_000;
+
+    public interface Listener {
+        void onStateChanged(boolean recording, int pointCount, long trackId);
+
+        void onError(String message);
+
+        default void onPointRecorded(double lat, double lon) {
+        }
+    }
+
+    private final ServerApi serverApi;
+    private final TelemetryUploader uploader;
+    private final NetworkMonitor networkMonitor;
+    private final String deviceId;
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
+    private final Handler mainHandler = new Handler(Looper.getMainLooper());
+    private final ScheduledExecutorService scheduler =
+            Executors.newSingleThreadScheduledExecutor(r -> {
+                Thread t = new Thread(r, "TrackSampler");
+                t.setDaemon(true);
+                return t;
+            });
+
+    private volatile double lat = Double.NaN;
+    private volatile double lon = Double.NaN;
+    private volatile double altitude = Double.NaN;
+    private volatile long trackId = -1;
+    private volatile boolean recording;
+    private final List<Map<String, Object>> buffer = new ArrayList<>();
+    private int totalPoints;
+    private ScheduledFuture<?> sampleTask;
+    private ScheduledFuture<?> flushTask;
+    private Listener listener;
+    private Listener pairedListener;
+
+    public TrackRecorder(
+            ServerApi serverApi,
+            TelemetryUploader uploader,
+            String deviceId,
+            NetworkMonitor networkMonitor
+    ) {
+        this.serverApi = serverApi;
+        this.uploader = uploader;
+        this.deviceId = deviceId;
+        this.networkMonitor = networkMonitor;
+        networkMonitor.addListener(online -> {
+            if (online && recording) {
+                executor.execute(this::flushBuffer);
+            }
+        });
+    }
+
+    public void setListener(Listener listener) {
+        this.listener = listener;
+    }
+
+    public void setPairedListener(Listener pairedListener) {
+        this.pairedListener = pairedListener;
+    }
+
+    public void updateLocation(double lat, double lon, double altitude) {
+        if (GeoUtils.isValidCoordinate(lat, lon)) {
+            this.lat = lat;
+            this.lon = lon;
+        }
+        if (!Double.isNaN(altitude) && altitude != 0.0) {
+            this.altitude = altitude;
+        }
+    }
+
+    public boolean isRecording() {
+        return recording;
+    }
+
+    public int getPointCount() {
+        return totalPoints;
+    }
+
+    public long getTrackId() {
+        return trackId;
+    }
+
+    public void start() {
+        if (recording) {
+            return;
+        }
+        if (!networkMonitor.isOnline()) {
+            notifyError("Нужна сеть для начала трека");
+            return;
+        }
+        executor.execute(() -> {
+            try {
+                long id = serverApi.startTrack(deviceId);
+                synchronized (buffer) {
+                    buffer.clear();
+                }
+                totalPoints = 0;
+                trackId = id;
+                recording = true;
+                startTimers();
+                notifyState();
+            } catch (Exception e) {
+                Log.e(TAG, "start track failed", e);
+                notifyError(e.getMessage());
+            }
+        });
+    }
+
+    public void stop() {
+        if (!recording) {
+            return;
+        }
+        recording = false;
+        stopTimers();
+        executor.execute(() -> {
+            try {
+                flushBuffer();
+                if (trackId > 0) {
+                    serverApi.finishTrack(trackId);
+                }
+            } catch (Exception e) {
+                Log.e(TAG, "stop track failed", e);
+                notifyError(e.getMessage());
+            } finally {
+                trackId = -1;
+                notifyState();
+            }
+        });
+    }
+
+    private void startTimers() {
+        sampleTask = scheduler.scheduleAtFixedRate(
+                () -> executor.execute(this::samplePoint),
+                SAMPLE_MS,
+                SAMPLE_MS,
+                TimeUnit.MILLISECONDS
+        );
+        flushTask = scheduler.scheduleAtFixedRate(
+                () -> executor.execute(this::flushBuffer),
+                FLUSH_MS,
+                FLUSH_MS,
+                TimeUnit.MILLISECONDS
+        );
+    }
+
+    private void stopTimers() {
+        if (sampleTask != null) {
+            sampleTask.cancel(false);
+            sampleTask = null;
+        }
+        if (flushTask != null) {
+            flushTask.cancel(false);
+            flushTask = null;
+        }
+    }
+
+    private void samplePoint() {
+        if (!recording || trackId < 0) {
+            return;
+        }
+        if (!GeoUtils.isValidCoordinate(lat, lon)) {
+            return;
+        }
+        StatsExtractor.ExtractedStats stats = uploader.getLastStats();
+        Map<String, Object> point = new HashMap<>();
+        point.put("ts", System.currentTimeMillis() / 1000.0);
+        point.put("lat", lat);
+        point.put("lon", lon);
+        if (!Double.isNaN(altitude)) {
+            point.put("altitude_gps", altitude);
+        }
+        if (stats != null) {
+            if (stats.rssi != null) {
+                point.put("rssi", stats.rssi);
+            }
+            if (stats.role != null) {
+                point.put("role", stats.role);
+            }
+            if (stats.metaJson != null) {
+                point.put("meta", stats.metaJson);
+            }
+        }
+        synchronized (buffer) {
+            buffer.add(point);
+        }
+        totalPoints++;
+        notifyState();
+        notifyPoint(lat, lon);
+    }
+
+    private void notifyPoint(double lat, double lon) {
+        mainHandler.post(() -> {
+            if (listener != null) {
+                listener.onPointRecorded(lat, lon);
+            }
+            if (pairedListener != null) {
+                pairedListener.onPointRecorded(lat, lon);
+            }
+        });
+    }
+
+    private void flushBuffer() {
+        if (trackId < 0) {
+            return;
+        }
+        List<Map<String, Object>> batch;
+        synchronized (buffer) {
+            if (buffer.isEmpty()) {
+                return;
+            }
+            batch = new ArrayList<>(buffer);
+            buffer.clear();
+        }
+        try {
+            serverApi.addTrackPoints(trackId, batch);
+        } catch (Exception e) {
+            Log.e(TAG, "flush points failed", e);
+            synchronized (buffer) {
+                buffer.addAll(0, batch);
+            }
+            notifyError(e.getMessage());
+        }
+    }
+
+    private void notifyState() {
+        mainHandler.post(() -> {
+            if (listener != null) {
+                listener.onStateChanged(recording, totalPoints, trackId);
+            }
+            if (pairedListener != null) {
+                pairedListener.onStateChanged(recording, totalPoints, trackId);
+            }
+        });
+    }
+
+    private void notifyError(String msg) {
+        mainHandler.post(() -> {
+            if (listener != null) {
+                listener.onError(msg);
+            }
+            if (pairedListener != null) {
+                pairedListener.onError(msg);
+            }
+        });
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/AtFragment.java

@@ -0,0 +1,313 @@
+package com.grigowashere.loratester.ui;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.ScrollView;
+import android.widget.Spinner;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+import com.google.android.material.button.MaterialButton;
+import com.google.android.material.button.MaterialButtonToggleGroup;
+import com.google.android.material.textfield.TextInputEditText;
+import com.grigowashere.loratester.CommandPoller;
+import com.grigowashere.loratester.LoraApp;
+import com.grigowashere.loratester.PeerDevices;
+import com.grigowashere.loratester.R;
+import com.grigowashere.loratester.TelemetryUploader;
+import com.grigowashere.loratester.api.DeviceInfo;
+import com.grigowashere.loratester.model.RadioSnapshot;
+import com.grigowashere.loratester.telnet.AtCommands;
+import com.grigowashere.loratester.telnet.LoraStatsFormatter;
+import com.grigowashere.loratester.telnet.RadioMacroBuilder;
+import com.grigowashere.loratester.telnet.StatsExtractor;
+import com.grigowashere.loratester.telnet.TelnetClient;
+
+import java.util.List;
+import java.util.Locale;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class AtFragment extends Fragment {
+
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
+    private FragmentPollHelper pollHelper;
+    private TelemetryUploader uploader;
+    private CommandPoller commandPoller;
+    private TextView atStatus;
+    private TextView atCurrentSnapshot;
+    private TextInputEditText atInputFq;
+    private TextInputEditText atInputPw;
+    private TextInputEditText atInputSf;
+    private TextInputEditText atInputPl;
+    private TextInputEditText atInputTm;
+    private Spinner atBwSpinner;
+    private Spinner atCrSpinner;
+    private Spinner atRoleSpinner;
+    private MaterialButtonToggleGroup atTargetGroup;
+    private ScrollView atConsoleScroll;
+    private TextView atConsole;
+    private String lastConsole = "";
+    private boolean consoleVisible;
+    private boolean formInitialized;
+
+    @Override
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        LoraApp app = (LoraApp) context.getApplicationContext();
+        uploader = app.getTelemetryUploader();
+        commandPoller = app.getCommandPoller();
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(
+            @NonNull LayoutInflater inflater,
+            @Nullable ViewGroup container,
+            @Nullable Bundle savedInstanceState
+    ) {
+        return inflater.inflate(R.layout.fragment_at, container, false);
+    }
+
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        atStatus = view.findViewById(R.id.atStatus);
+        atCurrentSnapshot = view.findViewById(R.id.atCurrentSnapshot);
+        atInputFq = view.findViewById(R.id.atInputFq);
+        atInputPw = view.findViewById(R.id.atInputPw);
+        atInputSf = view.findViewById(R.id.atInputSf);
+        atInputPl = view.findViewById(R.id.atInputPl);
+        atInputTm = view.findViewById(R.id.atInputTm);
+        atBwSpinner = view.findViewById(R.id.atBwSpinner);
+        atCrSpinner = view.findViewById(R.id.atCrSpinner);
+        atRoleSpinner = view.findViewById(R.id.atRoleSpinner);
+        atTargetGroup = view.findViewById(R.id.atTargetGroup);
+        atConsoleScroll = view.findViewById(R.id.atConsoleScroll);
+        atConsole = view.findViewById(R.id.atConsole);
+        Button applyBtn = view.findViewById(R.id.atApplyBtn);
+        Button stopBtn = view.findViewById(R.id.atStopBtn);
+        MaterialButton consoleToggle = view.findViewById(R.id.atConsoleToggle);
+        pollHelper = new FragmentPollHelper(this, this::refresh);
+
+        atTargetGroup.check(R.id.atTargetLocal);
+        atBwSpinner.setAdapter(new ArrayAdapter<>(
+                requireContext(),
+                android.R.layout.simple_spinner_dropdown_item,
+                AtCommands.BW_KHZ
+        ));
+        atCrSpinner.setAdapter(new ArrayAdapter<>(
+                requireContext(),
+                android.R.layout.simple_spinner_dropdown_item,
+                AtCommands.CODE_RATES
+        ));
+        atRoleSpinner.setAdapter(new ArrayAdapter<>(
+                requireContext(),
+                android.R.layout.simple_spinner_dropdown_item,
+                new String[]{"—", "TX", "RX"}
+        ));
+
+        applyBtn.setOnClickListener(v -> applyMacro());
+        stopBtn.setOnClickListener(v -> sendLines(List.of(AtCommands.STOP)));
+        consoleToggle.setOnClickListener(v -> {
+            consoleVisible = !consoleVisible;
+            atConsoleScroll.setVisibility(consoleVisible ? View.VISIBLE : View.GONE);
+            consoleToggle.setText(consoleVisible
+                    ? getString(R.string.at_console_hide)
+                    : getString(R.string.at_console_toggle));
+        });
+    }
+
+    private RadioMacroBuilder.Params buildParams() {
+        RadioMacroBuilder.Params p = new RadioMacroBuilder.Params();
+        Double fqMhz = parseDouble(atInputFq);
+        if (fqMhz != null) {
+            p.frequencyHz = Math.round(fqMhz * 1_000_000L);
+        }
+        p.powerDbm = parseInt(atInputPw);
+        p.sf = parseInt(atInputSf);
+        int bwPos = atBwSpinner != null ? atBwSpinner.getSelectedItemPosition() : -1;
+        if (bwPos >= 0 && bwPos < AtCommands.BW_KHZ.length) {
+            p.bwKhz = AtCommands.BW_KHZ[bwPos];
+        }
+        if (atCrSpinner != null && atCrSpinner.getSelectedItem() != null) {
+            p.codeRate = atCrSpinner.getSelectedItem().toString();
+        }
+        p.preamble = parseInt(atInputPl);
+        p.sendTimeoutMs = parseInt(atInputTm);
+        if (atRoleSpinner != null && atRoleSpinner.getSelectedItem() != null) {
+            String role = atRoleSpinner.getSelectedItem().toString();
+            if (!"—".equals(role)) {
+                p.role = role;
+            }
+        }
+        return p;
+    }
+
+    private void applyMacro() {
+        sendLines(RadioMacroBuilder.apply(buildParams()));
+    }
+
+    private void sendLines(List<String> lines) {
+        if (isPeerTarget()) {
+            sendMacroToPeer(lines);
+        } else {
+            uploader.sendMacroSequence(lines, this::onSendResult);
+        }
+    }
+
+    private void sendMacroToPeer(List<String> lines) {
+        executor.execute(() -> {
+            try {
+                List<DeviceInfo> devices = uploader.getServerApi().getDevices();
+                PeerDevices.Result peer = PeerDevices.resolve(devices, uploader.getDeviceId());
+                if (!peer.ok()) {
+                    showToast(R.string.at_peer_unavailable);
+                    return;
+                }
+                commandPoller.postMacroToPeer(peer.peerId, lines);
+                showToast(getString(R.string.at_sent_to_peer, peer.peerId));
+            } catch (Exception e) {
+                showToast(R.string.stats_push_failed);
+            }
+        });
+    }
+
+    private void onSendResult(TelnetClient.SendResult result) {
+        if (!isAdded()) return;
+        if (result == TelnetClient.SendResult.NOT_CONNECTED) {
+            showToast(R.string.at_not_connected);
+        } else if (result == TelnetClient.SendResult.IO_ERROR) {
+            showToast(R.string.at_send_error);
+        }
+        updateConsoleView();
+    }
+
+    private Integer parseInt(TextInputEditText field) {
+        if (field == null || field.getText() == null) return null;
+        String s = field.getText().toString().trim();
+        if (s.isEmpty()) return null;
+        try {
+            return Integer.parseInt(s);
+        } catch (NumberFormatException e) {
+            return null;
+        }
+    }
+
+    private Double parseDouble(TextInputEditText field) {
+        if (field == null || field.getText() == null) return null;
+        String s = field.getText().toString().trim();
+        if (s.isEmpty()) return null;
+        try {
+            return Double.parseDouble(s);
+        } catch (NumberFormatException e) {
+            return null;
+        }
+    }
+
+    private boolean isPeerTarget() {
+        return atTargetGroup != null && atTargetGroup.getCheckedButtonId() == R.id.atTargetPeer;
+    }
+
+    private void refresh() {
+        if (!isAdded() || uploader == null || atStatus == null) return;
+        atStatus.setText(getString(
+                R.string.at_status,
+                uploader.isTelnetConnected()
+                        ? getString(R.string.connected) : getString(R.string.disconnected)
+        ));
+        RadioSnapshot snap = RadioSnapshot.fromExtracted(uploader.getLastStats());
+        atCurrentSnapshot.setText(LoraStatsFormatter.formatStatic(snap, java.util.Set.of())
+                + "\n" + LoraStatsFormatter.formatDynamic(snap, java.util.Set.of()));
+        if (!formInitialized) {
+            if (snap.frequencyMhz != null && isEmpty(atInputFq)) {
+                atInputFq.setText(String.format(Locale.US, "%.3f", snap.frequencyMhz));
+            }
+            if (snap.powerDbm != null && isEmpty(atInputPw)) {
+                atInputPw.setText(String.valueOf(snap.powerDbm.intValue()));
+            }
+            if (snap.sf != null && isEmpty(atInputSf)) {
+                atInputSf.setText(String.valueOf(snap.sf));
+            }
+            if (snap.bwKhz != null) {
+                selectBw(String.valueOf(snap.bwKhz));
+            }
+            if (snap.role != null && atRoleSpinner != null) {
+                atRoleSpinner.setSelection(StatsExtractor.ROLE_RX.equals(snap.role) ? 2 : 1);
+            }
+            formInitialized = true;
+        }
+        updateConsoleView();
+        if (pollHelper != null) {
+            pollHelper.scheduleNext(400);
+        }
+    }
+
+    private static boolean isEmpty(TextInputEditText field) {
+        return field == null || field.getText() == null || field.getText().length() == 0;
+    }
+
+    private void selectBw(String bw) {
+        if (atBwSpinner == null || bw == null) return;
+        for (int i = 0; i < AtCommands.BW_KHZ.length; i++) {
+            if (AtCommands.BW_KHZ[i].equals(bw) || AtCommands.BW_KHZ[i].equals(bw.replace(".0", ""))) {
+                atBwSpinner.setSelection(i);
+                return;
+            }
+        }
+    }
+
+    private void updateConsoleView() {
+        if (uploader == null || atConsole == null || atConsoleScroll == null) return;
+        String log = uploader.getConsoleLog();
+        if (!log.equals(lastConsole)) {
+            lastConsole = log;
+            atConsole.setText(log);
+            if (consoleVisible) {
+                atConsoleScroll.post(() -> atConsoleScroll.fullScroll(View.FOCUS_DOWN));
+            }
+        }
+    }
+
+    private void showToast(int resId) {
+        if (isAdded()) Toast.makeText(requireContext(), resId, Toast.LENGTH_SHORT).show();
+    }
+
+    private void showToast(String msg) {
+        if (isAdded()) Toast.makeText(requireContext(), msg, Toast.LENGTH_SHORT).show();
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (pollHelper != null) pollHelper.start(0);
+    }
+
+    @Override
+    public void onPause() {
+        if (pollHelper != null) pollHelper.stop();
+        super.onPause();
+    }
+
+    @Override
+    public void onDestroyView() {
+        if (pollHelper != null) pollHelper.stop();
+        pollHelper = null;
+        formInitialized = false;
+        super.onDestroyView();
+    }
+
+    @Override
+    public void onDestroy() {
+        executor.shutdownNow();
+        super.onDestroy();
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/ChatAdapter.java

@@ -0,0 +1,161 @@
+package com.grigowashere.loratester.ui;
+
+import android.graphics.Color;
+import android.os.Handler;
+import android.os.Looper;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.FrameLayout;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.grigowashere.loratester.R;
+import com.grigowashere.loratester.api.ChatMessage;
+
+import java.text.DateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+
+public class ChatAdapter extends RecyclerView.Adapter<ChatAdapter.Holder> {
+
+    private static final int COLOR_SELF_BG = 0xFF16213E;
+    private static final int COLOR_OTHER_BG = 0xFF1A4A6E;
+    private static final int COLOR_NEW_HIGHLIGHT = 0x33E94560;
+
+    private final List<ChatMessage> messages = new ArrayList<>();
+    private final DateFormat timeFormat =
+            DateFormat.getTimeInstance(DateFormat.SHORT, Locale.getDefault());
+    private final Handler handler = new Handler(Looper.getMainLooper());
+    private final Set<Integer> highlightedPositions = new HashSet<>();
+
+    private String selfDeviceId;
+    private double lastSeenTs;
+
+    public void setSelfDeviceId(String selfDeviceId) {
+        this.selfDeviceId = selfDeviceId;
+    }
+
+    public void setLastSeenTs(double lastSeenTs) {
+        this.lastSeenTs = lastSeenTs;
+    }
+
+    public void setMessages(List<ChatMessage> newMessages) {
+        messages.clear();
+        highlightedPositions.clear();
+        messages.addAll(newMessages);
+        notifyDataSetChanged();
+    }
+
+    public void appendMessages(List<ChatMessage> more) {
+        if (more.isEmpty()) {
+            return;
+        }
+        int start = messages.size();
+        messages.addAll(more);
+        for (int i = 0; i < more.size(); i++) {
+            if (more.get(i).ts > lastSeenTs) {
+                highlightedPositions.add(start + i);
+            }
+        }
+        notifyItemRangeInserted(start, more.size());
+        for (int i = 0; i < more.size(); i++) {
+            int pos = start + i;
+            if (highlightedPositions.contains(pos)) {
+                scheduleClearHighlight(pos);
+            }
+        }
+    }
+
+    private void scheduleClearHighlight(int position) {
+        handler.postDelayed(() -> {
+            if (highlightedPositions.remove(position)) {
+                notifyItemChanged(position);
+            }
+        }, 3000);
+    }
+
+    public double lastTs() {
+        if (messages.isEmpty()) {
+            return 0;
+        }
+        return messages.get(messages.size() - 1).ts;
+    }
+
+    @NonNull
+    @Override
+    public Holder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View v = LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.item_chat, parent, false);
+        return new Holder(v);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull Holder holder, int position) {
+        ChatMessage m = messages.get(position);
+        boolean self = selfDeviceId != null && selfDeviceId.equals(m.device_id);
+        String time = timeFormat.format(new Date((long) (m.ts * 1000)));
+
+        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) holder.bubble.getLayoutParams();
+        lp.gravity = self ? Gravity.END : Gravity.START;
+        holder.bubble.setLayoutParams(lp);
+        holder.bubble.setBackgroundColor(self ? COLOR_SELF_BG : COLOR_OTHER_BG);
+
+        holder.author.setText(self
+                ? holder.itemView.getContext().getString(R.string.chat_self_label)
+                : m.device_id);
+        holder.text.setText(m.text);
+        holder.time.setText(time);
+
+        int bg = self ? COLOR_SELF_BG : COLOR_OTHER_BG;
+        if (highlightedPositions.contains(position)) {
+            holder.bubble.setBackgroundColor(blend(bg, COLOR_NEW_HIGHLIGHT));
+        } else {
+            holder.bubble.setBackgroundColor(bg);
+        }
+    }
+
+    private static int blend(int base, int overlay) {
+        int ba = Color.alpha(base);
+        int br = Color.red(base);
+        int bg = Color.green(base);
+        int bb = Color.blue(base);
+        int oa = Color.alpha(overlay);
+        int or = Color.red(overlay);
+        int og = Color.green(overlay);
+        int ob = Color.blue(overlay);
+        float ratio = oa / 255f;
+        int r = (int) (br * (1 - ratio) + or * ratio);
+        int g = (int) (bg * (1 - ratio) + og * ratio);
+        int b = (int) (bb * (1 - ratio) + ob * ratio);
+        return Color.argb(ba, r, g, b);
+    }
+
+    @Override
+    public int getItemCount() {
+        return messages.size();
+    }
+
+    static class Holder extends RecyclerView.ViewHolder {
+        final LinearLayout bubble;
+        final TextView author;
+        final TextView text;
+        final TextView time;
+
+        Holder(@NonNull View itemView) {
+            super(itemView);
+            bubble = itemView.findViewById(R.id.chatBubble);
+            author = itemView.findViewById(R.id.chatAuthor);
+            text = itemView.findViewById(R.id.chatText);
+            time = itemView.findViewById(R.id.chatTime);
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/ChatFragment.java

@@ -0,0 +1,244 @@
+package com.grigowashere.loratester.ui;
+
+import android.content.Context;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.VibrationEffect;
+import android.os.Vibrator;
+import android.os.VibratorManager;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.inputmethod.EditorInfo;
+import android.widget.Button;
+import android.widget.EditText;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.grigowashere.loratester.LoraApp;
+import com.grigowashere.loratester.R;
+import com.grigowashere.loratester.TelemetryUploader;
+import com.grigowashere.loratester.api.ChatMessage;
+
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class ChatFragment extends Fragment {
+
+    private static final int VIBRATE_MS = 40;
+
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
+    private FragmentPollHelper pollHelper;
+    private TelemetryUploader uploader;
+    private ChatAdapter adapter;
+    private RecyclerView recycler;
+    private double chatSince;
+
+    @Override
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        uploader = ((LoraApp) context.getApplicationContext()).getTelemetryUploader();
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(
+            @NonNull LayoutInflater inflater,
+            @Nullable ViewGroup container,
+            @Nullable Bundle savedInstanceState
+    ) {
+        return inflater.inflate(R.layout.fragment_chat, container, false);
+    }
+
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        recycler = view.findViewById(R.id.chatRecycler);
+        EditText input = view.findViewById(R.id.chatInput);
+        Button send = view.findViewById(R.id.chatSend);
+        View inputBar = view.findViewById(R.id.chatInputBar);
+
+        adapter = new ChatAdapter();
+        if (uploader != null) {
+            adapter.setSelfDeviceId(uploader.getDeviceId());
+        }
+        LinearLayoutManager layoutManager = new LinearLayoutManager(requireContext());
+        recycler.setLayoutManager(layoutManager);
+        recycler.setAdapter(adapter);
+        pollHelper = new FragmentPollHelper(this, this::pollChat);
+
+        ViewCompat.setOnApplyWindowInsetsListener(inputBar, (v, windowInsets) -> {
+            Insets ime = windowInsets.getInsets(WindowInsetsCompat.Type.ime());
+            v.setPadding(v.getPaddingLeft(), v.getPaddingTop(), v.getPaddingRight(), ime.bottom);
+            if (ime.bottom > 0 && adapter.getItemCount() > 0) {
+                scrollToLatest();
+            }
+            return windowInsets;
+        });
+
+        Runnable doSend = () -> sendMessage(input);
+        send.setOnClickListener(v -> doSend.run());
+        input.setOnEditorActionListener((v, actionId, event) -> {
+            if (actionId == EditorInfo.IME_ACTION_SEND) {
+                doSend.run();
+                return true;
+            }
+            return false;
+        });
+
+        input.setOnFocusChangeListener((v, hasFocus) -> {
+            if (hasFocus) {
+                scrollToLatest();
+            }
+        });
+    }
+
+    private void sendMessage(EditText input) {
+        String text = input.getText().toString().trim();
+        if (text.isEmpty() || uploader == null) {
+            return;
+        }
+        input.setText("");
+        executor.execute(() -> {
+            try {
+                uploader.getServerApi().postChat(uploader.getDeviceId(), text);
+            } catch (Exception ignored) {
+                // ignore
+            }
+            if (pollHelper != null && pollHelper.canRun()) {
+                pollChat();
+            }
+        });
+    }
+
+    private void scrollToLatest() {
+        if (recycler == null || adapter.getItemCount() == 0) {
+            return;
+        }
+        int last = adapter.getItemCount() - 1;
+        recycler.post(() -> recycler.smoothScrollToPosition(last));
+    }
+
+    private void vibrateOnNewMessage() {
+        Context ctx = getContext();
+        if (ctx == null) {
+            return;
+        }
+        try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+                VibratorManager vm = (VibratorManager) ctx.getSystemService(Context.VIBRATOR_MANAGER_SERVICE);
+                if (vm != null) {
+                    Vibrator v = vm.getDefaultVibrator();
+                    if (v != null && v.hasVibrator()) {
+                        v.vibrate(VibrationEffect.createOneShot(
+                                VIBRATE_MS,
+                                VibrationEffect.DEFAULT_AMPLITUDE
+                        ));
+                    }
+                }
+            } else {
+                Vibrator v = (Vibrator) ctx.getSystemService(Context.VIBRATOR_SERVICE);
+                if (v != null && v.hasVibrator()) {
+                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                        v.vibrate(VibrationEffect.createOneShot(
+                                VIBRATE_MS,
+                                VibrationEffect.DEFAULT_AMPLITUDE
+                        ));
+                    } else {
+                        v.vibrate(VIBRATE_MS);
+                    }
+                }
+            }
+        } catch (Exception ignored) {
+            // ignore missing vibrator
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (adapter != null && uploader != null) {
+            adapter.setSelfDeviceId(uploader.getDeviceId());
+            adapter.setLastSeenTs(chatSince);
+        }
+        if (pollHelper != null) {
+            pollHelper.start(0);
+        }
+    }
+
+    @Override
+    public void onPause() {
+        if (pollHelper != null) {
+            pollHelper.stop();
+        }
+        super.onPause();
+    }
+
+    @Override
+    public void onDestroyView() {
+        if (pollHelper != null) {
+            pollHelper.stop();
+        }
+        recycler = null;
+        super.onDestroyView();
+    }
+
+    @Override
+    public void onDestroy() {
+        executor.shutdownNow();
+        super.onDestroy();
+    }
+
+    private void pollChat() {
+        if (!pollHelper.canRun() || uploader == null) {
+            return;
+        }
+        String myId = uploader.getDeviceId();
+        executor.execute(() -> {
+            try {
+                List<ChatMessage> msgs = uploader.getServerApi().getChat(chatSince);
+                for (ChatMessage m : msgs) {
+                    chatSince = Math.max(chatSince, m.ts);
+                }
+                if (!pollHelper.canRun() || msgs.isEmpty()) {
+                    if (pollHelper.canRun()) {
+                        pollHelper.scheduleNext(2500);
+                    }
+                    return;
+                }
+                boolean vibrate = false;
+                for (ChatMessage m : msgs) {
+                    if (m.device_id != null && !m.device_id.equals(myId)) {
+                        vibrate = true;
+                        break;
+                    }
+                }
+                boolean shouldVibrate = vibrate;
+                requireActivity().runOnUiThread(() -> {
+                    if (!pollHelper.canRun()) {
+                        return;
+                    }
+                    if (adapter.getItemCount() == 0) {
+                        adapter.setMessages(msgs);
+                    } else {
+                        adapter.appendMessages(msgs);
+                    }
+                    scrollToLatest();
+                    if (shouldVibrate) {
+                        vibrateOnNewMessage();
+                    }
+                });
+            } catch (Exception ignored) {
+                // ignore
+            }
+            pollHelper.scheduleNext(2500);
+        });
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/ElevationColorRamp.java

@@ -0,0 +1,39 @@
+package com.grigowashere.loratester.ui;
+
+/** Diverging color ramp: blue = below, green = level, brown = above. */
+final class ElevationColorRamp {
+
+  private static final int ALPHA = 0x8C;
+
+  private ElevationColorRamp() {
+  }
+
+  static int deltaToArgb(double deltaM) {
+    if (deltaM <= -8.0) {
+      return argb(0x1A, 0x4A, 0x8C);
+    }
+    if (deltaM <= -2.0) {
+      return lerp(argb(0x1A, 0x4A, 0x8C), argb(0x4F, 0xC3, 0xF7), (deltaM + 8.0) / 6.0);
+    }
+    if (deltaM <= 2.0) {
+      return lerp(argb(0x4F, 0xC3, 0xF7), argb(0x00, 0xFF, 0x88), (deltaM + 2.0) / 4.0);
+    }
+    if (deltaM <= 8.0) {
+      return lerp(argb(0x00, 0xFF, 0x88), argb(0xFF, 0xC1, 0x07), (deltaM - 2.0) / 6.0);
+    }
+    return argb(0x8B, 0x5A, 0x2B);
+  }
+
+  private static int argb(int r, int g, int b) {
+    return (ALPHA << 24) | (r << 16) | (g << 8) | b;
+  }
+
+  private static int lerp(int from, int to, double t) {
+    t = Math.max(0.0, Math.min(1.0, t));
+    int a = (int) Math.round(((from >>> 24) & 0xFF) + t * (((to >>> 24) & 0xFF) - ((from >>> 24) & 0xFF)));
+    int r = (int) Math.round(((from >> 16) & 0xFF) + t * (((to >> 16) & 0xFF) - ((from >> 16) & 0xFF)));
+    int g = (int) Math.round(((from >> 8) & 0xFF) + t * (((to >> 8) & 0xFF) - ((from >> 8) & 0xFF)));
+    int b = (int) Math.round((from & 0xFF) + t * ((to & 0xFF) - (from & 0xFF)));
+    return (a << 24) | (r << 16) | (g << 8) | b;
+  }
+}

app/src/main/java/com/grigowashere/loratester/ui/ElevationHeatmapBitmap.java

@@ -0,0 +1,100 @@
+package com.grigowashere.loratester.ui;
+
+import android.graphics.Bitmap;
+
+import androidx.annotation.Nullable;
+
+import com.grigowashere.loratester.api.ElevationGridResult;
+
+import org.mapsforge.core.model.LatLong;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/** Builds a geo-referenced raster from elevation grid API response. */
+final class ElevationHeatmapBitmap {
+
+  static final class Raster {
+    final Bitmap bitmap;
+    final LatLong northWest;
+    final LatLong southEast;
+
+    Raster(Bitmap bitmap, LatLong northWest, LatLong southEast) {
+      this.bitmap = bitmap;
+      this.northWest = northWest;
+      this.southEast = southEast;
+    }
+  }
+
+  private ElevationHeatmapBitmap() {
+  }
+
+  @Nullable
+  static Raster build(ElevationGridResult grid) {
+    if (grid == null || !grid.ok || grid.points == null || grid.points.isEmpty()) {
+      return null;
+    }
+
+    int minI = Integer.MAX_VALUE;
+    int maxI = Integer.MIN_VALUE;
+    int minJ = Integer.MAX_VALUE;
+    int maxJ = Integer.MIN_VALUE;
+    double minLat = Double.MAX_VALUE;
+    double maxLat = -Double.MAX_VALUE;
+    double minLon = Double.MAX_VALUE;
+    double maxLon = -Double.MAX_VALUE;
+
+    Map<Long, ElevationGridResult.GridPoint> byIndex = new HashMap<>();
+    for (ElevationGridResult.GridPoint p : grid.points) {
+      minI = Math.min(minI, p.i);
+      maxI = Math.max(maxI, p.i);
+      minJ = Math.min(minJ, p.j);
+      maxJ = Math.max(maxJ, p.j);
+      minLat = Math.min(minLat, p.lat);
+      maxLat = Math.max(maxLat, p.lat);
+      minLon = Math.min(minLon, p.lon);
+      maxLon = Math.max(maxLon, p.lon);
+      byIndex.put(pack(p.i, p.j), p);
+    }
+
+    int cols = maxJ - minJ + 1;
+    int rows = maxI - minI + 1;
+    if (cols < 1 || rows < 1) {
+      return null;
+    }
+
+    int[] pixels = new int[cols * rows];
+    double radiusM = grid.radius_m > 0 ? grid.radius_m : 200.0;
+    double stepM = grid.step_m > 0 ? grid.step_m : 15.0;
+
+    for (int row = 0; row < rows; row++) {
+      int i = maxI - row;
+      for (int col = 0; col < cols; col++) {
+        int j = minJ + col;
+        double dist = Math.hypot(i * stepM, j * stepM);
+        if (dist > radiusM + stepM * 0.5) {
+          continue;
+        }
+        ElevationGridResult.GridPoint p = byIndex.get(pack(i, j));
+        if (p != null && p.elevation_m != null) {
+          pixels[row * cols + col] = ElevationColorRamp.deltaToArgb(p.delta_m);
+        }
+      }
+    }
+
+    Bitmap bitmap = Bitmap.createBitmap(cols, rows, Bitmap.Config.ARGB_8888);
+    bitmap.setPixels(pixels, 0, cols, 0, 0, cols, rows);
+
+    double halfStepLat = (stepM / 2.0) / 111_320.0;
+    double halfStepLon = (stepM / 2.0)
+            / (111_320.0 * Math.max(Math.cos(Math.toRadians((minLat + maxLat) / 2.0)), 1e-6));
+
+    LatLong northWest = new LatLong(maxLat + halfStepLat, minLon - halfStepLon);
+    LatLong southEast = new LatLong(minLat - halfStepLat, maxLon + halfStepLon);
+    return new Raster(bitmap, northWest, southEast);
+  }
+
+  private static long pack(int i, int j) {
+    return ((long) i << 32) ^ (j & 0xFFFFFFFFL);
+  }
+}

app/src/main/java/com/grigowashere/loratester/ui/ElevationHeatmapLayer.java

@@ -0,0 +1,85 @@
+package com.grigowashere.loratester.ui;
+
+import android.graphics.Bitmap;
+
+import com.grigowashere.loratester.api.ElevationGridResult;
+
+import org.mapsforge.core.graphics.Canvas;
+import org.mapsforge.core.model.BoundingBox;
+import org.mapsforge.core.model.LatLong;
+import org.mapsforge.core.model.Point;
+import org.mapsforge.core.util.MercatorProjection;
+import org.mapsforge.map.android.graphics.AndroidBitmap;
+import org.mapsforge.map.layer.Layer;
+
+/** Geo-referenced elevation heatmap overlay for Mapsforge. */
+public class ElevationHeatmapLayer extends Layer {
+
+  private static final int TILE_SIZE = 256;
+
+  private Bitmap sourceBitmap;
+  private org.mapsforge.core.graphics.Bitmap mapsforgeBitmap;
+  private LatLong northWest;
+  private LatLong southEast;
+
+  public void setGrid(ElevationGridResult grid) {
+    sourceBitmap = null;
+    mapsforgeBitmap = null;
+
+    ElevationHeatmapBitmap.Raster raster = ElevationHeatmapBitmap.build(grid);
+    if (raster == null) {
+      northWest = null;
+      southEast = null;
+      return;
+    }
+    sourceBitmap = raster.bitmap;
+    northWest = raster.northWest;
+    southEast = raster.southEast;
+  }
+
+  public boolean hasData() {
+    return sourceBitmap != null && northWest != null && southEast != null;
+  }
+
+  @Override
+  public void draw(BoundingBox boundingBox, byte zoomLevel, Canvas canvas, Point topLeftPoint) {
+    if (!hasData()) {
+      return;
+    }
+
+    BoundingBox rasterBox = new BoundingBox(
+            southEast.latitude,
+            northWest.longitude,
+            northWest.latitude,
+            southEast.longitude
+    );
+    if (!boundingBox.intersects(rasterBox)) {
+      return;
+    }
+
+    long mapSize = MercatorProjection.getMapSize(zoomLevel, TILE_SIZE);
+    int left = (int) Math.round(
+            MercatorProjection.longitudeToPixelX(northWest.longitude, mapSize) - topLeftPoint.x);
+    int top = (int) Math.round(
+            MercatorProjection.latitudeToPixelY(northWest.latitude, mapSize) - topLeftPoint.y);
+    int right = (int) Math.round(
+            MercatorProjection.longitudeToPixelX(southEast.longitude, mapSize) - topLeftPoint.x);
+    int bottom = (int) Math.round(
+            MercatorProjection.latitudeToPixelY(southEast.latitude, mapSize) - topLeftPoint.y);
+
+    int width = right - left;
+    int height = bottom - top;
+    if (width <= 0 || height <= 0) {
+      return;
+    }
+
+    if (mapsforgeBitmap == null) {
+      mapsforgeBitmap = new AndroidBitmap(sourceBitmap);
+    }
+
+    canvas.drawBitmap(
+            mapsforgeBitmap,
+            0, 0, sourceBitmap.getWidth(), sourceBitmap.getHeight(),
+            left, top, right, bottom);
+  }
+}

app/src/main/java/com/grigowashere/loratester/ui/ElevationHeatmapLegendView.java

@@ -0,0 +1,125 @@
+package com.grigowashere.loratester.ui;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.LinearGradient;
+import android.graphics.Paint;
+import android.graphics.RectF;
+import android.graphics.Shader;
+import android.util.AttributeSet;
+import android.view.View;
+
+import androidx.annotation.Nullable;
+
+import com.grigowashere.loratester.R;
+
+/** Color scale for elevation heatmap (relative to GPS center). */
+public class ElevationHeatmapLegendView extends View {
+
+  private static final double DELTA_MIN = -10.0;
+  private static final double DELTA_MAX = 10.0;
+
+  private final Paint bgPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+  private final Paint barPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+  private final Paint labelPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+  private final Paint titlePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+  private final RectF barRect = new RectF();
+  private final RectF bgRect = new RectF();
+
+  public ElevationHeatmapLegendView(Context context) {
+    super(context);
+    init();
+  }
+
+  public ElevationHeatmapLegendView(Context context, @Nullable AttributeSet attrs) {
+    super(context, attrs);
+    init();
+  }
+
+  public ElevationHeatmapLegendView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+    super(context, attrs, defStyleAttr);
+    init();
+  }
+
+  private void init() {
+    bgPaint.setColor(0xCC0F3460);
+    labelPaint.setColor(0xFFEEEEEE);
+    labelPaint.setTextSize(sp(9));
+    titlePaint.setColor(0xFFFFFFFF);
+    titlePaint.setTextSize(sp(9));
+    titlePaint.setFakeBoldText(true);
+    setLayerType(LAYER_TYPE_SOFTWARE, null);
+  }
+
+  private float sp(float value) {
+    return value * getResources().getDisplayMetrics().scaledDensity;
+  }
+
+  private float dp(float value) {
+    return value * getResources().getDisplayMetrics().density;
+  }
+
+  @Override
+  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+    int w = (int) dp(118);
+    int h = (int) dp(118);
+    setMeasuredDimension(
+            resolveSize(w, widthMeasureSpec),
+            resolveSize(h, heightMeasureSpec));
+  }
+
+  @Override
+  protected void onDraw(Canvas canvas) {
+    float pad = dp(6);
+    bgRect.set(pad, pad, getWidth() - pad, getHeight() - pad);
+    canvas.drawRoundRect(bgRect, dp(4), dp(4), bgPaint);
+
+    float titleY = bgRect.top + dp(12);
+    canvas.drawText(getContext().getString(R.string.map_heatmap_legend_title),
+            bgRect.left + dp(6), titleY, titlePaint);
+
+    float barLeft = bgRect.left + dp(8);
+    float barTop = titleY + dp(6);
+    float barBottom = bgRect.bottom - dp(8);
+    float barRight = barLeft + dp(14);
+    barRect.set(barLeft, barTop, barRight, barBottom);
+
+    int[] colors = sampleRampColors(24);
+    float[] positions = new float[colors.length];
+    for (int i = 0; i < colors.length; i++) {
+      positions[i] = i / (float) (colors.length - 1);
+    }
+    barPaint.setShader(new LinearGradient(
+            barRect.left, barRect.top, barRect.left, barRect.bottom,
+            colors, positions, Shader.TileMode.CLAMP));
+    canvas.drawRoundRect(barRect, dp(2), dp(2), barPaint);
+    barPaint.setShader(null);
+
+    float textX = barRect.right + dp(6);
+    drawLegendRow(canvas, textX, barRect.top + dp(4),
+            getContext().getString(R.string.map_heatmap_legend_high),
+            "+8 m");
+    drawLegendRow(canvas, textX, (barRect.top + barRect.bottom) / 2f,
+            getContext().getString(R.string.map_heatmap_legend_level),
+            "0 m");
+    drawLegendRow(canvas, textX, barRect.bottom - dp(4),
+            getContext().getString(R.string.map_heatmap_legend_low),
+            "-8 m");
+  }
+
+  private void drawLegendRow(Canvas canvas, float x, float centerY, String label, String meters) {
+    float lineH = labelPaint.getTextSize();
+    canvas.drawText(label, x, centerY - dp(1), labelPaint);
+    canvas.drawText(meters, x, centerY + lineH - dp(2), labelPaint);
+  }
+
+  private static int[] sampleRampColors(int steps) {
+    int[] colors = new int[steps];
+    for (int i = 0; i < steps; i++) {
+      double t = i / (double) (steps - 1);
+      double delta = DELTA_MAX + t * (DELTA_MIN - DELTA_MAX);
+      colors[i] = ElevationColorRamp.deltaToArgb(delta) | 0xFF000000;
+    }
+    return colors;
+  }
+}

app/src/main/java/com/grigowashere/loratester/ui/FragmentPollHelper.java

@@ -0,0 +1,50 @@
+package com.grigowashere.loratester.ui;
+
+import android.os.Handler;
+import android.os.Looper;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.Lifecycle;
+
+/**
+ * Safe periodic polling: no callbacks after onPause / when fragment is detached.
+ */
+public final class FragmentPollHelper {
+
+    private final Fragment fragment;
+    private final Handler handler = new Handler(Looper.getMainLooper());
+    private final Runnable task;
+    private boolean active;
+
+    public FragmentPollHelper(@NonNull Fragment fragment, @NonNull Runnable task) {
+        this.fragment = fragment;
+        this.task = task;
+    }
+
+    public void start(long initialDelayMs) {
+        active = true;
+        handler.removeCallbacks(task);
+        handler.postDelayed(task, initialDelayMs);
+    }
+
+    public void stop() {
+        active = false;
+        handler.removeCallbacks(task);
+    }
+
+    public void scheduleNext(long delayMs) {
+        if (!active || !fragment.isAdded()) {
+            return;
+        }
+        handler.removeCallbacks(task);
+        handler.postDelayed(task, delayMs);
+    }
+
+    public boolean canRun() {
+        return active
+                && fragment.isAdded()
+                && fragment.getView() != null
+                && fragment.getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.STARTED);
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/HistoryAdapter.java

@@ -0,0 +1,73 @@
+package com.grigowashere.loratester.ui;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.grigowashere.loratester.R;
+import com.grigowashere.loratester.api.TelemetryHistoryItem;
+import com.grigowashere.loratester.telnet.LoraStatsFormatter;
+
+import java.text.DateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Locale;
+
+public class HistoryAdapter extends RecyclerView.Adapter<HistoryAdapter.Holder> {
+
+    private final DateFormat timeFormat =
+            DateFormat.getTimeInstance(DateFormat.MEDIUM, Locale.getDefault());
+    private final List<String> lines = new ArrayList<>();
+
+    public void setItems(List<TelemetryHistoryItem> items) {
+        lines.clear();
+        if (items == null) {
+            notifyDataSetChanged();
+            return;
+        }
+        for (TelemetryHistoryItem item : items) {
+            String time = timeFormat.format(new Date((long) (item.ts * 1000)));
+            String role = item.role != null ? item.role : "—";
+            String rssi = item.rssi != null ? item.rssi + " dBm" : "—";
+            String summary = LoraStatsFormatter.formatMeta(item.meta);
+            String shortMeta = summary.length() > 80
+                    ? summary.substring(0, 80) + "…"
+                    : summary;
+            lines.add(time + " · " + role + " · " + rssi
+                    + (shortMeta.isEmpty() ? "" : "\n" + shortMeta));
+        }
+        notifyDataSetChanged();
+    }
+
+    @NonNull
+    @Override
+    public Holder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View v = LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.item_history, parent, false);
+        return new Holder(v);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull Holder holder, int position) {
+        holder.line.setText(lines.get(position));
+    }
+
+    @Override
+    public int getItemCount() {
+        return lines.size();
+    }
+
+    static class Holder extends RecyclerView.ViewHolder {
+        final TextView line;
+
+        Holder(@NonNull View itemView) {
+            super(itemView);
+            line = itemView.findViewById(R.id.historyLine);
+        }
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/MainPagerAdapter.java

@@ -0,0 +1,30 @@
+package com.grigowashere.loratester.ui;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+
+public class MainPagerAdapter extends FragmentStateAdapter {
+
+    public MainPagerAdapter(@NonNull FragmentActivity activity) {
+        super(activity);
+    }
+
+    @NonNull
+    @Override
+    public Fragment createFragment(int position) {
+        return switch (position) {
+            case 0 -> new MapFragment();
+            case 1 -> new StatsFragment();
+            case 2 -> new AtFragment();
+            case 3 -> new ChatFragment();
+            default -> new SettingsFragment();
+        };
+    }
+
+    @Override
+    public int getItemCount() {
+        return 5;
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/MapsforgeBitmaps.java

@@ -0,0 +1,46 @@
+package com.grigowashere.loratester.ui;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+
+import org.mapsforge.core.graphics.Color;
+import org.mapsforge.map.android.graphics.AndroidBitmap;
+import org.mapsforge.map.android.graphics.AndroidGraphicFactory;
+
+/** Small colored bitmaps for device/track markers on Mapsforge. */
+final class MapsforgeBitmaps {
+
+    private MapsforgeBitmaps() {
+    }
+
+    static org.mapsforge.core.graphics.Bitmap dot(int argb, int sizePx) {
+        Bitmap androidBitmap = Bitmap.createBitmap(sizePx, sizePx, Bitmap.Config.ARGB_8888);
+        Canvas canvas = new Canvas(androidBitmap);
+        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        paint.setColor(argb);
+        canvas.drawCircle(sizePx / 2f, sizePx / 2f, sizePx / 2f - 1f, paint);
+        Paint stroke = new Paint(Paint.ANTI_ALIAS_FLAG);
+        stroke.setStyle(Paint.Style.STROKE);
+        stroke.setColor(0xFFFFFFFF);
+        stroke.setStrokeWidth(2f);
+        canvas.drawCircle(sizePx / 2f, sizePx / 2f, sizePx / 2f - 2f, stroke);
+        return new AndroidBitmap(androidBitmap);
+    }
+
+    static org.mapsforge.core.graphics.Paint linePaint(Color color, float strokeWidth) {
+        org.mapsforge.core.graphics.Paint paint = AndroidGraphicFactory.INSTANCE.createPaint();
+        paint.setColor(color);
+        paint.setStrokeWidth(strokeWidth);
+        paint.setStyle(org.mapsforge.core.graphics.Style.STROKE);
+        return paint;
+    }
+
+    static org.mapsforge.core.graphics.Paint linePaint(int argb, float strokeWidth) {
+        int a = (argb >> 24) & 0xFF;
+        int r = (argb >> 16) & 0xFF;
+        int g = (argb >> 8) & 0xFF;
+        int b = argb & 0xFF;
+        return linePaint(AndroidGraphicFactory.INSTANCE.createColor(r, g, b, a), strokeWidth);
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/RadioComparePanel.java

@@ -0,0 +1,216 @@
+package com.grigowashere.loratester.ui;
+
+import android.content.Context;
+import android.graphics.Color;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.TableLayout;
+import android.widget.TableRow;
+import android.widget.TextView;
+
+import androidx.annotation.Nullable;
+
+import com.google.android.material.button.MaterialButton;
+import com.grigowashere.loratester.R;
+import com.grigowashere.loratester.model.RadioSnapshot;
+import com.grigowashere.loratester.telnet.LoraStatsFormatter;
+import com.grigowashere.loratester.telnet.StatsExtractor;
+
+import java.util.Locale;
+import java.util.Set;
+
+public class RadioComparePanel extends LinearLayout {
+
+    private static final int COLOR_TX = 0xFFE94560;
+    private static final int COLOR_RX = 0xFF4FC3F7;
+    private static final int COLOR_CHANGED = 0x33E94560;
+
+    private TextView txHeader;
+    private TextView rxHeader;
+    private TableLayout dynamicTable;
+    private TableLayout staticTable;
+    private MaterialButton staticToggle;
+    private boolean staticExpanded;
+
+    public RadioComparePanel(Context context) {
+        super(context);
+        init(context);
+    }
+
+    public RadioComparePanel(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    private void init(Context context) {
+        setOrientation(VERTICAL);
+        LayoutInflater.from(context).inflate(R.layout.view_radio_compare, this, true);
+        txHeader = findViewById(R.id.compareTxHeader);
+        rxHeader = findViewById(R.id.compareRxHeader);
+        dynamicTable = findViewById(R.id.compareDynamicTable);
+        staticTable = findViewById(R.id.compareStaticTable);
+        staticToggle = findViewById(R.id.compareStaticToggle);
+        staticToggle.setOnClickListener(v -> {
+            staticExpanded = !staticExpanded;
+            staticTable.setVisibility(staticExpanded ? VISIBLE : GONE);
+            staticToggle.setText(staticExpanded
+                    ? getContext().getString(R.string.stats_static_hide)
+                    : getContext().getString(R.string.stats_static_toggle));
+        });
+    }
+
+    public void bind(
+            RadioSnapshot txSnap,
+            RadioSnapshot rxSnap,
+            String txDeviceId,
+            String rxDeviceId,
+            Set<String> changedTx,
+            Set<String> changedRx
+    ) {
+        txHeader.setText("TX · " + (txDeviceId != null ? txDeviceId : "—"));
+        rxHeader.setText("RX · " + (rxDeviceId != null ? rxDeviceId : "—"));
+        fillTable(dynamicTable, true, txSnap, rxSnap, changedTx, changedRx);
+        fillTable(staticTable, false, txSnap, rxSnap, changedTx, changedRx);
+    }
+
+    private void fillTable(
+            TableLayout table,
+            boolean dynamic,
+            RadioSnapshot tx,
+            RadioSnapshot rx,
+            Set<String> changedTx,
+            Set<String> changedRx
+    ) {
+        table.removeAllViews();
+        if (dynamic) {
+            addRow(table, "RSSI", fmtDbm(tx.rssiDbm), fmtDbm(rx.rssiDbm), "rssi", changedTx, changedRx);
+            addRow(table, "SNR", fmtSuffix(tx.snrDb, " dB"), fmtSuffix(rx.snrDb, " dB"), "snr", changedTx, changedRx);
+            addRow(table, "RX Quality", fmtSuffix(tx.rxQualityPercent, " %"), fmtSuffix(rx.rxQualityPercent, " %"),
+                    "rxQuality", changedTx, changedRx);
+            addRow(table, "Пакет", fmtInt(tx.packet), fmtInt(rx.packet), "packet", changedTx, changedRx);
+            addRow(table, "Payload", str(tx.payload), str(rx.payload), "payload", changedTx, changedRx);
+            addRow(table, "PER", fmtSuffix(tx.perPercent, " %"), fmtSuffix(rx.perPercent, " %"), "per", changedTx, changedRx);
+            addRow(table, "Принято", fmtInt(tx.packetReceive), fmtInt(rx.packetReceive), "packetReceive", changedTx, changedRx);
+            addRow(table, "Всего", fmtInt(tx.packetTotal), fmtInt(rx.packetTotal), "packetTotal", changedTx, changedRx);
+            addRow(table, "Ошибки", fmtInt(tx.packetError), fmtInt(rx.packetError), "packetError", changedTx, changedRx);
+            addRow(table, "CRC err", fmtInt(tx.crcError), fmtInt(rx.crcError), "crcError", changedTx, changedRx);
+            addRow(table, "Preamble", fmtInt(tx.preambleDetected), fmtInt(rx.preambleDetected),
+                    "preambleDetected", changedTx, changedRx);
+            addRow(table, "Header OK", fmtInt(tx.headerValid), fmtInt(rx.headerValid), "headerValid", changedTx, changedRx);
+            addRow(table, "TX spd", fmtSuffix(tx.txPktPerS, " p/s"), fmtSuffix(rx.txPktPerS, " p/s"), "txSpeed", changedTx, changedRx);
+            addRow(table, "RX spd", fmtSuffix(tx.rxPktPerS, " p/s"), fmtSuffix(rx.rxPktPerS, " p/s"), "rxSpeed", changedTx, changedRx);
+        } else {
+            addRow(table, "Роль", LoraStatsFormatter.roleLabel(tx.role), LoraStatsFormatter.roleLabel(rx.role), "role", changedTx, changedRx);
+            addRow(table, "Частота", fmtMhz(tx.frequencyMhz), fmtMhz(rx.frequencyMhz), "frequency", changedTx, changedRx);
+            addRow(table, "SF", fmtInt(tx.sf), fmtInt(rx.sf), "sf", changedTx, changedRx);
+            addRow(table, "BW", fmtBw(tx.bwKhz), fmtBw(rx.bwKhz), "bw", changedTx, changedRx);
+            addRow(table, "Мощн.", fmtDbm(tx.powerDbm), fmtDbm(rx.powerDbm), "power", changedTx, changedRx);
+            addRow(table, "Code Rate", str(tx.codeRate), str(rx.codeRate), "codeRate", changedTx, changedRx);
+            addRow(table, "Preamble", fmtInt(tx.preambleLength), fmtInt(rx.preambleLength), "preambleLength", changedTx, changedRx);
+            addRow(table, "LDR", str(tx.lowDataRateOpt), str(rx.lowDataRateOpt), "lowDataRateOpt", changedTx, changedRx);
+            addRow(table, "CRC", fmtCrc(tx.crcEnabled), fmtCrc(rx.crcEnabled), "crc", changedTx, changedRx);
+            addRow(table, "Payl.len", fmtSuffixInt(tx.payloadLengthBytes, " B"), fmtSuffixInt(rx.payloadLengthBytes, " B"),
+                    "payloadLength", changedTx, changedRx);
+            addRow(table, "TX Timeout", fmtSuffix(tx.txTimeoutMs, " ms"), fmtSuffix(rx.txTimeoutMs, " ms"),
+                    "txTimeout", changedTx, changedRx);
+            addRow(table, "On Air", fmtSuffix(tx.onAirMs, " ms"), fmtSuffix(rx.onAirMs, " ms"), "onAir", changedTx, changedRx);
+        }
+    }
+
+    private void addRow(
+            TableLayout table,
+            String label,
+            String txVal,
+            String rxVal,
+            String changeKey,
+            Set<String> changedTx,
+            Set<String> changedRx
+    ) {
+        TableRow row = new TableRow(getContext());
+        TextView lbl = cell(label, 0xFFAAAAAA, false);
+        TextView tx = cell(txVal, COLOR_TX, changedTx != null && changedTx.contains(changeKey));
+        TextView rx = cell(rxVal, COLOR_RX, changedRx != null && changedRx.contains(changeKey));
+        row.addView(lbl);
+        row.addView(tx);
+        row.addView(rx);
+        table.addView(row);
+    }
+
+    private TextView cell(String text, int color, boolean changed) {
+        TextView tv = new TextView(getContext());
+        tv.setText(text != null ? text : "—");
+        tv.setTextColor(color);
+        tv.setTextSize(11f);
+        tv.setPadding(4, 2, 4, 2);
+        if (changed) {
+            tv.setBackgroundColor(COLOR_CHANGED);
+        }
+        return tv;
+    }
+
+    /** Assign TX/RX snapshots by device role. */
+    public static void bindByRole(
+            RadioComparePanel panel,
+            RadioSnapshot local,
+            RadioSnapshot peer,
+            String localId,
+            String peerId,
+            Set<String> changedLocal,
+            Set<String> changedPeer
+    ) {
+        RadioSnapshot tx = local;
+        RadioSnapshot rx = peer;
+        String txId = localId;
+        String rxId = peerId;
+        Set<String> chTx = changedLocal;
+        Set<String> chRx = changedPeer;
+        if (StatsExtractor.ROLE_RX.equals(local != null ? local.role : null)) {
+            tx = peer;
+            rx = local;
+            txId = peerId;
+            rxId = localId;
+            chTx = changedPeer;
+            chRx = changedLocal;
+        }
+        if (tx == null) tx = RadioSnapshot.empty();
+        if (rx == null) rx = RadioSnapshot.empty();
+        panel.bind(tx, rx, txId, rxId, chTx, chRx);
+    }
+
+    private static String str(String v) {
+        return v != null && !v.isEmpty() ? v : "—";
+    }
+
+    private static String fmtInt(Integer v) {
+        return v != null ? String.valueOf(v) : "—";
+    }
+
+    private static String fmtDbm(Double v) {
+        return v != null ? String.format(Locale.US, "%.0f dBm", v) : "—";
+    }
+
+    private static String fmtMhz(Double v) {
+        return v != null ? String.format(Locale.US, "%.3f MHz", v) : "—";
+    }
+
+    private static String fmtSuffix(Double v, String suffix) {
+        return v != null ? v + suffix : "—";
+    }
+
+    private static String fmtBw(Double v) {
+        return v != null ? String.format(Locale.US, "%.2f kHz", v) : "—";
+    }
+
+    private static String fmtCrc(Boolean enabled) {
+        if (enabled == null) {
+            return "—";
+        }
+        return enabled ? "On" : "Off";
+    }
+
+    private static String fmtSuffixInt(Integer v, String suffix) {
+        return v != null ? v + suffix : "—";
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/SettingsFragment.java

@@ -0,0 +1,103 @@
+package com.grigowashere.loratester.ui;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+import com.google.android.material.switchmaterial.SwitchMaterial;
+import com.google.android.material.textfield.TextInputEditText;
+import com.grigowashere.loratester.LoraApp;
+import com.grigowashere.loratester.LoraForegroundService;
+import com.grigowashere.loratester.MainActivity;
+import com.grigowashere.loratester.R;
+import com.grigowashere.loratester.SettingsRepository;
+import com.grigowashere.loratester.TelemetryUploader;
+
+public class SettingsFragment extends Fragment {
+
+    @Nullable
+    @Override
+    public View onCreateView(
+            @NonNull LayoutInflater inflater,
+            @Nullable ViewGroup container,
+            @Nullable Bundle savedInstanceState
+    ) {
+        return inflater.inflate(R.layout.fragment_settings, container, false);
+    }
+
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        LoraApp app = (LoraApp) requireActivity().getApplication();
+        SettingsRepository settings = app.getSettingsRepository();
+        TelemetryUploader uploader = app.getTelemetryUploader();
+
+        TextInputEditText editServer = view.findViewById(R.id.editServerUrl);
+        TextInputEditText editHost = view.findViewById(R.id.editTelnetHost);
+        TextInputEditText editPort = view.findViewById(R.id.editTelnetPort);
+        TextInputEditText editRssi = view.findViewById(R.id.editRssiRegex);
+        TextInputEditText editRange = view.findViewById(R.id.editRangeRegex);
+        TextInputEditText editDeviceLabel = view.findViewById(R.id.editDeviceLabel);
+        SwitchMaterial switchTelnet = view.findViewById(R.id.switchTelnet);
+        Button batteryBtn = view.findViewById(R.id.btnBatteryOptimization);
+        TextView deviceIdLabel = view.findViewById(R.id.deviceIdLabel);
+        Button save = view.findViewById(R.id.btnSaveSettings);
+
+        editServer.setText(settings.getServerUrl());
+        editHost.setText(settings.getTelnetHost());
+        editPort.setText(String.valueOf(settings.getTelnetPort()));
+        editRssi.setText(settings.getRssiRegex());
+        editRange.setText(settings.getRangeRegex());
+        String savedLabel = settings.getDeviceLabel();
+        if (savedLabel != null) {
+            editDeviceLabel.setText(savedLabel);
+        }
+        switchTelnet.setChecked(settings.isTelnetEnabled());
+        deviceIdLabel.setText(getString(R.string.device_id_label, settings.getOrCreateDeviceId()));
+
+        batteryBtn.setOnClickListener(v -> {
+            if (MainActivity.isIgnoringBatteryOptimizations(requireContext())) {
+                Toast.makeText(requireContext(), R.string.battery_optimization_done, Toast.LENGTH_SHORT).show();
+                return;
+            }
+            MainActivity.openBatteryOptimizationSettings(requireContext());
+        });
+
+        save.setOnClickListener(v -> {
+            settings.setServerUrl(textOf(editServer, SettingsRepository.DEFAULT_SERVER));
+            settings.setTelnetHost(textOf(editHost, SettingsRepository.DEFAULT_TELNET_HOST));
+            try {
+                settings.setTelnetPort(Integer.parseInt(textOf(editPort, "2727")));
+            } catch (NumberFormatException e) {
+                settings.setTelnetPort(SettingsRepository.DEFAULT_TELNET_PORT);
+            }
+            settings.setRssiRegex(textOf(editRssi, SettingsRepository.DEFAULT_RSSI_REGEX));
+            settings.setRangeRegex(textOf(editRange, SettingsRepository.DEFAULT_RANGE_REGEX));
+            settings.setDeviceLabel(textOf(editDeviceLabel, ""));
+            settings.setTelnetEnabled(switchTelnet.isChecked());
+            uploader.refreshApi();
+            uploader.registerPresence();
+            if (switchTelnet.isChecked()) {
+                uploader.startTelnet();
+            } else {
+                uploader.stopTelnet();
+            }
+            LoraForegroundService.ensureRunning(requireContext());
+            Toast.makeText(requireContext(), R.string.saved, Toast.LENGTH_SHORT).show();
+        });
+    }
+
+    private static String textOf(TextInputEditText edit, String fallback) {
+        if (edit.getText() == null || edit.getText().toString().trim().isEmpty()) {
+            return fallback;
+        }
+        return edit.getText().toString().trim();
+    }
+}

app/src/main/java/com/grigowashere/loratester/ui/StatsFragment.java

@@ -0,0 +1,273 @@
+package com.grigowashere.loratester.ui;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.grigowashere.loratester.CommandPoller;
+import com.grigowashere.loratester.LoraApp;
+import com.grigowashere.loratester.PeerDevices;
+import com.grigowashere.loratester.PeerStatsCache;
+import com.grigowashere.loratester.R;
+import com.grigowashere.loratester.TelemetryUploader;
+import com.grigowashere.loratester.api.DeviceInfo;
+import com.grigowashere.loratester.api.TelemetryHistoryItem;
+import com.grigowashere.loratester.model.RadioSnapshot;
+import com.grigowashere.loratester.telnet.StatsExtractor;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class StatsFragment extends Fragment {
+
+    private static final long SERVER_POLL_MS = 1000;
+
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
+    private FragmentPollHelper pollHelper;
+    private TelemetryUploader uploader;
+    private CommandPoller commandPoller;
+    private PeerStatsCache peerStatsCache;
+    private TextView statsStatus;
+    private TextView statsPeerWarning;
+    private RadioComparePanel radioComparePanel;
+    private RecyclerView statsHistoryList;
+    private final HistoryAdapter historyAdapter = new HistoryAdapter();
+
+    private RadioSnapshot prevLocal = RadioSnapshot.empty();
+    private RadioSnapshot prevPeer = RadioSnapshot.empty();
+    private RadioSnapshot snapLocal = RadioSnapshot.empty();
+    private RadioSnapshot snapPeer = RadioSnapshot.empty();
+    private String cachedPeerId;
+    private String cachedPeerError;
+    private int cachedDeviceCount;
+
+    private final TelemetryUploader.StatsListener statsListener = stats -> postRender();
+
+    @Override
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        LoraApp app = (LoraApp) context.getApplicationContext();
+        uploader = app.getTelemetryUploader();
+        commandPoller = app.getCommandPoller();
+        peerStatsCache = app.getPeerStatsCache();
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(
+            @NonNull LayoutInflater inflater,
+            @Nullable ViewGroup container,
+            @Nullable Bundle savedInstanceState
+    ) {
+        return inflater.inflate(R.layout.fragment_stats, container, false);
+    }
+
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        statsStatus = view.findViewById(R.id.statsStatus);
+        statsPeerWarning = view.findViewById(R.id.statsPeerWarning);
+        radioComparePanel = view.findViewById(R.id.radioComparePanel);
+        statsHistoryList = view.findViewById(R.id.statsHistoryList);
+        statsHistoryList.setLayoutManager(new LinearLayoutManager(requireContext()));
+        statsHistoryList.setAdapter(historyAdapter);
+        Button btnSimulate = view.findViewById(R.id.btnSimulate);
+        Button btnPushStats = view.findViewById(R.id.btnPushStats);
+        pollHelper = new FragmentPollHelper(this, this::refresh);
+
+        btnSimulate.setOnClickListener(v -> {
+            String chunk = """
+                    SEND
+                    Frequency:         433000000 Hz
+                    Power:             22 dBm
+                    Spreading Factor:  7
+                    Bandwidth:         125 kHz
+                    Packet:            1
+                    Payload:           Sim TX
+                    \u001b[2J""";
+            uploader.simulateChunk(chunk);
+        });
+        btnPushStats.setOnClickListener(v -> pushStatsToPeer());
+    }
+
+    private void pushStatsToPeer() {
+        if (commandPoller == null || cachedPeerId == null) {
+            toast(R.string.at_peer_unavailable);
+            return;
+        }
+        Map<String, Object> payload = new HashMap<>();
+        StatsExtractor.ExtractedStats localStats = uploader.getLastStats();
+        if (localStats != null && localStats.metaJson != null) {
+            payload.put("meta", localStats.metaJson);
+        }
+        if (snapLocal.role != null) payload.put("role", snapLocal.role);
+        if (snapLocal.rssiDbm != null) payload.put("rssi", snapLocal.rssiDbm);
+        if (snapLocal.sf != null) payload.put("sf", snapLocal.sf);
+        if (snapLocal.bwKhz != null) payload.put("bw", snapLocal.bwKhz);
+        commandPoller.postCommandToPeer(cachedPeerId, "stats_push", payload);
+        toast(R.string.stats_pushed);
+    }
+
+    private void toast(int resId) {
+        if (isAdded()) {
+            Toast.makeText(requireContext(), resId, Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (uploader != null) {
+            uploader.setStatsListener(statsListener);
+            postRender();
+        }
+        if (pollHelper != null) {
+            pollHelper.start(0);
+        }
+    }
+
+    @Override
+    public void onPause() {
+        if (uploader != null) {
+            uploader.setStatsListener(null);
+        }
+        if (pollHelper != null) {
+            pollHelper.stop();
+        }
+        super.onPause();
+    }
+
+    @Override
+    public void onDestroyView() {
+        if (pollHelper != null) {
+            pollHelper.stop();
+        }
+        statsStatus = null;
+        statsPeerWarning = null;
+        radioComparePanel = null;
+        statsHistoryList = null;
+        pollHelper = null;
+        super.onDestroyView();
+    }
+
+    @Override
+    public void onDestroy() {
+        executor.shutdownNow();
+        super.onDestroy();
+    }
+
+    private void postRender() {
+        if (!isAdded() || radioComparePanel == null) {
+            return;
+        }
+        requireActivity().runOnUiThread(this::render);
+    }
+
+    private void refresh() {
+        if (!pollHelper.canRun() || uploader == null || statsStatus == null) {
+            return;
+        }
+        String deviceId = uploader.getDeviceId();
+        statsStatus.setText(getString(
+                R.string.stats_status,
+                deviceId,
+                uploader.isTelnetConnected()
+                        ? getString(R.string.connected) : getString(R.string.disconnected)
+        ));
+
+        executor.execute(() -> {
+            List<TelemetryHistoryItem> history = null;
+            try {
+                List<DeviceInfo> devices = uploader.getServerApi().getDevices();
+                cachedDeviceCount = devices.size();
+                PeerDevices.Result peer = PeerDevices.resolve(devices, deviceId);
+                cachedPeerId = peer.peerId;
+                cachedPeerError = peer.error;
+
+                DeviceInfo self = null;
+                DeviceInfo peerDev = null;
+                for (DeviceInfo d : devices) {
+                    if (deviceId.equals(d.device_id)) {
+                        self = d;
+                    } else if (peer.peerId != null && peer.peerId.equals(d.device_id)) {
+                        peerDev = d;
+                    }
+                }
+
+                StatsExtractor.ExtractedStats localStats = uploader.getLastStats();
+                snapLocal = localStats != null
+                        ? RadioSnapshot.fromExtracted(localStats)
+                        : RadioSnapshot.fromMeta(
+                                self != null ? self.meta : null,
+                                self != null ? self.role : null,
+                                self != null ? self.rssi : null);
+
+                PeerStatsCache.Snapshot push = peerStatsCache != null ? peerStatsCache.get() : null;
+                if (push != null && push.meta != null) {
+                    snapPeer = RadioSnapshot.fromMeta(push.meta, push.role, push.rssi);
+                } else {
+                    snapPeer = RadioSnapshot.fromMeta(
+                            peerDev != null ? peerDev.meta : null,
+                            peerDev != null ? peerDev.role : null,
+                            peerDev != null ? peerDev.rssi : null);
+                }
+
+                history = uploader.getServerApi().getTelemetryHistory(deviceId, 30);
+            } catch (Exception ignored) {
+            }
+            List<TelemetryHistoryItem> finalHistory = history;
+            if (isAdded()) {
+                requireActivity().runOnUiThread(() -> {
+                    if (historyAdapter != null) {
+                        historyAdapter.setItems(finalHistory);
+                    }
+                });
+            }
+            postRender();
+            if (pollHelper != null) {
+                pollHelper.scheduleNext(SERVER_POLL_MS);
+            }
+        });
+    }
+
+    private void render() {
+        if (!isAdded() || radioComparePanel == null || uploader == null) {
+            return;
+        }
+        if (statsPeerWarning != null) {
+            if (cachedPeerError != null) {
+                statsPeerWarning.setVisibility(View.VISIBLE);
+                statsPeerWarning.setText(
+                        getString(R.string.stats_two_devices_required, cachedDeviceCount));
+            } else {
+                statsPeerWarning.setVisibility(View.GONE);
+            }
+        }
+        var chLocal = snapLocal.diff(prevLocal);
+        var chPeer = snapPeer.diff(prevPeer);
+        RadioComparePanel.bindByRole(
+                radioComparePanel,
+                snapLocal,
+                snapPeer,
+                uploader.getDeviceId(),
+                cachedPeerId,
+                chLocal,
+                chPeer
+        );
+        prevLocal = snapLocal;
+        prevPeer = snapPeer;
+    }
+}

app/src/main/res/color/map_tool_icon_tint.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="#00FF88" android:state_activated="true" />
+    <item android:color="#FFFFFF" />
+</selector>

app/src/main/res/drawable/bg_map_panel.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#CC0F3460" />
+    <corners android:radius="12dp" />
+</shape>

app/src/main/res/drawable/ic_center.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M12,8c-2.21,0 -4,1.79 -4,4s1.79,4 4,4 4,-1.79 4,-4 -1.79,-4 -4,-4zM12,2C6.47,2 2,6.47 2,12s4.47,10 10,10 10,-4.47 10,-10S17.53,2 12,2zM12,20c-4.42,0 -8,-3.58 -8,-8s3.58,-8 8,-8 8,3.58 8,8 -3.58,8 -8,8z" />
+</vector>

app/src/main/res/drawable/ic_heatmap.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M3,17h2v-3H3v3zM3,12h2V9H3v3zM7,17h2v-5H7v5zM7,7h2V5H7v2zM11,17h2V7h-2v10zM15,17h2v-3h-2v3zM15,12h2V9h-2v3zM19,17h2v-7h-2v7zM19,8h2V5h-2v3z" />
+</vector>

app/src/main/res/drawable/ic_hill.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M14,6l-3.75,5 2.75,3.5L9,18H3l8.5,-10.5L14,6zM17.5,10.5L14,15h6l-2.5,-4.5z" />
+</vector>

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

app/src/main/res/drawable/ic_link_lora.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M12,3C7.03,3 3,7.03 3,12h2c0,-3.87 3.13,-7 7,-7s7,3.13 7,7h2c0,-4.97 -4.03,-9 -9,-9zM12,7c-2.76,0 -5,2.24 -5,5h2c0,-1.66 1.34,-3 3,-3s3,1.34 3,3h2c0,-2.76 -2.24,-5 -5,-5zM12,11c-0.55,0 -1,0.45 -1,1h2c0,-0.55 -0.45,-1 -1,-1zM4.5,14.5L2,17l2.5,2.5 1.4,-1.4L4.8,17l1.1,-1.1 -1.4,-1.4zM19.5,14.5l-1.4,1.4 1.1,1.1 -1.1,1.1 1.4,1.4L22,17l-2.5,-2.5z" />
+</vector>

app/src/main/res/drawable/ic_link_server.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M4,18h16v2H4v-2zM6,15h2v2H6v-2zM16,15h2v2h-2v-2zM8,12h8v2H8v-2zM10,9h4v2h-4V9zM12,6c-2.2,0 -4,1.8 -4,4h2c0,-1.1 0.9,-2 2,-2s2,0.9 2,2h2c0,-2.2 -1.8,-4 -4,-4z" />
+</vector>

app/src/main/res/drawable/ic_marker.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <size
+        android:width="16dp"
+        android:height="16dp" />
+    <solid android:color="#E94560" />
+</shape>

app/src/main/res/drawable/ic_marker_rx.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <size
+        android:width="18dp"
+        android:height="18dp" />
+    <solid android:color="#4FC3F7" />
+    <stroke
+        android:width="2dp"
+        android:color="#FFFFFF" />
+</shape>

app/src/main/res/drawable/ic_marker_tx.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <size
+        android:width="18dp"
+        android:height="18dp" />
+    <solid android:color="#E94560" />
+    <stroke
+        android:width="2dp"
+        android:color="#FFFFFF" />
+</shape>

app/src/main/res/drawable/ic_more_vert.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M12,8c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM12,14c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM12,20c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2z" />
+</vector>

app/src/main/res/drawable/ic_paired_track.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M16,11c1.66,0 2.99,-1.34 2.99,-3S17.66,5 16,5c-1.66,0 -3,1.34 -3,3s1.34,3 3,3zM8,11c1.66,0 2.99,-1.34 2.99,-3S9.66,5 8,5C6.34,5 5,6.34 5,8s1.34,3 3,3zM8,13c-2.33,0 -7,1.17 -7,3.5V19h14v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5zM16,13c-0.29,0 -0.62,0.02 -0.97,0.05 1.16,0.84 1.97,1.97 1.97,3.45V19h6v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5z" />
+</vector>

app/src/main/res/drawable/ic_stat_service.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M12,2C8.13,2 5,5.13 5,9c0,5.25 7,13 7,13s7,-7.75 7,-13c0,-3.87 -3.13,-7 -7,-7zM12,11.5c-1.38,0 -2.5,-1.12 -2.5,-2.5s1.12,-2.5 2.5,-2.5 2.5,1.12 2.5,2.5 -1.12,2.5 -2.5,2.5z" />
+</vector>

app/src/main/res/drawable/ic_track.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M12,2C8.13,2 5,5.13 5,9c0,5.25 7,13 7,13s7,-7.75 7,-13c0,-3.87 -3.13,-7 -7,-7zM12,11.5c-1.38,0 -2.5,-1.12 -2.5,-2.5s1.12,-2.5 2.5,-2.5 2.5,1.12 2.5,2.5 -1.12,2.5 -2.5,2.5z" />
+</vector>

app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <com.google.android.material.tabs.TabLayout
+        android:id="@+id/tabLayout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:tabMode="scrollable" />
+
+    <androidx.viewpager2.widget.ViewPager2
+        android:id="@+id/viewPager"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1" />
+
+</LinearLayout>

app/src/main/res/layout/fragment_at.xml

@@ -0,0 +1,228 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="12dp">
+
+    <TextView
+        android:id="@+id/atStatus"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="14sp" />
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:fillViewport="true">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:text="@string/at_current_values"
+                android:textStyle="bold" />
+
+            <TextView
+                android:id="@+id/atCurrentSnapshot"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:fontFamily="monospace"
+                android:textSize="11sp" />
+
+            <com.google.android.material.textfield.TextInputLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:hint="@string/at_hint_fq_mhz">
+
+                <com.google.android.material.textfield.TextInputEditText
+                    android:id="@+id/atInputFq"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:inputType="numberDecimal" />
+            </com.google.android.material.textfield.TextInputLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
+
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:hint="@string/at_hint_power">
+
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/atInputPw"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:inputType="numberSigned" />
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="8dp"
+                    android:layout_weight="1"
+                    android:hint="SF">
+
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/atInputSf"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:inputType="number" />
+                </com.google.android.material.textfield.TextInputLayout>
+            </LinearLayout>
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:text="@string/at_hint_bw"
+                android:textSize="12sp" />
+
+            <Spinner
+                android:id="@+id/atBwSpinner"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:text="@string/at_hint_cr"
+                android:textSize="12sp" />
+
+            <Spinner
+                android:id="@+id/atCrSpinner"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
+
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:hint="@string/at_hint_pl">
+
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/atInputPl"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:inputType="number" />
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="8dp"
+                    android:layout_weight="1"
+                    android:hint="@string/at_hint_tm">
+
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/atInputTm"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:inputType="number" />
+                </com.google.android.material.textfield.TextInputLayout>
+            </LinearLayout>
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:text="@string/at_hint_role"
+                android:textSize="12sp" />
+
+            <Spinner
+                android:id="@+id/atRoleSpinner"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content" />
+
+            <com.google.android.material.button.MaterialButtonToggleGroup
+                android:id="@+id/atTargetGroup"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="6dp"
+                app:selectionRequired="true"
+                app:singleSelection="true">
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/atTargetLocal"
+                    style="@style/Widget.Material3.Button.OutlinedButton"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="@string/at_target_local" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/atTargetPeer"
+                    style="@style/Widget.Material3.Button.OutlinedButton"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="@string/at_target_peer" />
+            </com.google.android.material.button.MaterialButtonToggleGroup>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="6dp"
+                android:orientation="horizontal">
+
+                <Button
+                    android:id="@+id/atApplyBtn"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="@string/at_apply" />
+
+                <Button
+                    android:id="@+id/atStopBtn"
+                    style="@style/Widget.Material3.Button.OutlinedButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="6dp"
+                    android:text="S" />
+            </LinearLayout>
+        </LinearLayout>
+    </ScrollView>
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/atConsoleToggle"
+        style="@style/Widget.Material3.Button.TextButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/at_console_toggle" />
+
+    <ScrollView
+        android:id="@+id/atConsoleScroll"
+        android:layout_width="match_parent"
+        android:layout_height="120dp"
+        android:background="#0D1117"
+        android:padding="8dp"
+        android:visibility="gone">
+
+        <TextView
+            android:id="@+id/atConsole"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:fontFamily="monospace"
+            android:textColor="#C9D1D9"
+            android:textIsSelectable="true"
+            android:textSize="11sp" />
+    </ScrollView>
+</LinearLayout>

app/src/main/res/layout/fragment_chat.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/chatRoot"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingHorizontal="8dp"
+    android:paddingTop="8dp">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/chatRecycler"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:clipToPadding="false"
+        android:paddingBottom="4dp" />
+
+    <LinearLayout
+        android:id="@+id/chatInputBar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:paddingBottom="8dp">
+
+        <EditText
+            android:id="@+id/chatInput"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:hint="@string/chat_hint"
+            android:imeOptions="actionSend"
+            android:inputType="textCapSentences" />
+
+        <Button
+            android:id="@+id/chatSend"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/send" />
+    </LinearLayout>
+</LinearLayout>

app/src/main/res/layout/fragment_map.xml

@@ -0,0 +1,307 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <org.mapsforge.map.android.view.MapView
+        android:id="@+id/mapView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <LinearLayout
+        android:id="@+id/mapStatusChip"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="top|start"
+        android:layout_marginStart="8dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="56dp"
+        android:background="@drawable/bg_map_panel"
+        android:elevation="6dp"
+        android:orientation="vertical"
+        android:paddingStart="8dp"
+        android:paddingTop="6dp"
+        android:paddingEnd="8dp"
+        android:paddingBottom="6dp">
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:gravity="center_vertical"
+            android:orientation="horizontal">
+
+            <ImageView
+                android:id="@+id/iconServer"
+                android:layout_width="18dp"
+                android:layout_height="18dp"
+                android:contentDescription="@string/status_server"
+                android:src="@drawable/ic_link_server" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="3dp"
+                android:text="@string/status_server_short"
+                android:textColor="#AAAAAA"
+                android:textSize="9sp" />
+
+            <ImageView
+                android:id="@+id/iconLora"
+                android:layout_width="18dp"
+                android:layout_height="18dp"
+                android:layout_marginStart="8dp"
+                android:contentDescription="@string/status_lora"
+                android:src="@drawable/ic_link_lora" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="3dp"
+                android:text="@string/status_lora_short"
+                android:textColor="#AAAAAA"
+                android:textSize="9sp" />
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/mapStatus"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="2dp"
+            android:maxLines="2"
+            android:textColor="#FFFFFF"
+            android:textSize="10sp" />
+
+        <TextView
+            android:id="@+id/mapDistance"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="2dp"
+            android:textColor="#00FF88"
+            android:textSize="9sp"
+            android:visibility="gone" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/mapToolRail"
+        android:layout_width="48dp"
+        android:layout_height="wrap_content"
+        android:layout_gravity="end|center_vertical"
+        android:layout_marginEnd="6dp"
+        android:background="@drawable/bg_map_panel"
+        android:elevation="6dp"
+        android:gravity="center_horizontal"
+        android:orientation="vertical"
+        android:paddingTop="4dp"
+        android:paddingBottom="4dp">
+
+        <ImageButton
+            android:id="@+id/btnToolCenter"
+            style="@style/Widget.Material3.Button.IconButton"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:contentDescription="@string/map_tool_center"
+            android:src="@drawable/ic_center"
+            app:tint="@color/map_tool_icon_tint" />
+
+        <ImageButton
+            android:id="@+id/btnFindHill"
+            style="@style/Widget.Material3.Button.IconButton"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:contentDescription="@string/map_find_hill"
+            android:src="@drawable/ic_hill"
+            app:tint="@color/map_tool_icon_tint" />
+
+        <ImageButton
+            android:id="@+id/btnHeatmap"
+            style="@style/Widget.Material3.Button.IconButton"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:contentDescription="@string/map_heatmap"
+            android:src="@drawable/ic_heatmap"
+            app:tint="@color/map_tool_icon_tint" />
+
+        <ImageButton
+            android:id="@+id/btnTrack"
+            style="@style/Widget.Material3.Button.IconButton"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:contentDescription="@string/map_tool_track"
+            android:src="@drawable/ic_track"
+            app:tint="@color/map_tool_icon_tint" />
+
+        <ImageButton
+            android:id="@+id/btnPairedTrack"
+            style="@style/Widget.Material3.Button.IconButton"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:contentDescription="@string/map_tool_paired"
+            android:src="@drawable/ic_paired_track"
+            app:tint="@color/map_tool_icon_tint" />
+
+        <ImageButton
+            android:id="@+id/btnToolMore"
+            style="@style/Widget.Material3.Button.IconButton"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:contentDescription="@string/map_tool_more"
+            android:src="@drawable/ic_more_vert"
+            app:tint="@color/map_tool_icon_tint" />
+    </LinearLayout>
+
+    <ScrollView
+        android:id="@+id/mapToolDrawer"
+        android:layout_width="148dp"
+        android:layout_height="wrap_content"
+        android:layout_gravity="end|top"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="56dp"
+        android:background="@drawable/bg_map_panel"
+        android:elevation="6dp"
+        android:scrollbars="none"
+        android:visibility="gone">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:padding="8dp">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/map_center_mode"
+                android:textColor="#00FF88"
+                android:textSize="10sp"
+                android:textStyle="bold" />
+
+            <com.google.android.material.button.MaterialButtonToggleGroup
+                android:id="@+id/mapCenterMode"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:orientation="vertical"
+                app:selectionRequired="false"
+                app:singleSelection="true">
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/centerMe"
+                    style="@style/Widget.Material3.Button.OutlinedButton"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:minHeight="32dp"
+                    android:text="@string/map_center_me"
+                    android:textSize="10sp" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/centerTx"
+                    style="@style/Widget.Material3.Button.OutlinedButton"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:minHeight="32dp"
+                    android:text="@string/map_center_tx"
+                    android:textSize="10sp" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/centerRx"
+                    style="@style/Widget.Material3.Button.OutlinedButton"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:minHeight="32dp"
+                    android:text="@string/map_center_rx"
+                    android:textSize="10sp" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/centerBoth"
+                    style="@style/Widget.Material3.Button.OutlinedButton"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:minHeight="32dp"
+                    android:text="@string/map_center_both"
+                    android:textSize="10sp" />
+            </com.google.android.material.button.MaterialButtonToggleGroup>
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:text="@string/map_layer"
+                android:textColor="#CCCCCC"
+                android:textSize="9sp" />
+
+            <Spinner
+                android:id="@+id/mapBasemap"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="2dp" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:text="@string/map_heatmap_radius"
+                android:textColor="#CCCCCC"
+                android:textSize="9sp" />
+
+            <Spinner
+                android:id="@+id/mapHeatmapRadius"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="2dp" />
+
+            <TextView
+                android:id="@+id/mapHeatmapStatus"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="2dp"
+                android:textColor="#AAAAAA"
+                android:textSize="9sp"
+                android:visibility="gone" />
+
+            <TextView
+                android:id="@+id/mapHillStatus"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:textColor="#FFC107"
+                android:textSize="9sp"
+                android:visibility="gone" />
+
+            <TextView
+                android:id="@+id/mapLegend"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="6dp"
+                android:text="@string/map_legend"
+                android:textColor="#CCCCCC"
+                android:textSize="9sp" />
+
+            <Spinner
+                android:id="@+id/trackSpinner"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="6dp" />
+
+            <TextView
+                android:id="@+id/trackStatus"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="2dp"
+                android:textColor="#CCCCCC"
+                android:textSize="9sp" />
+        </LinearLayout>
+    </ScrollView>
+
+    <com.grigowashere.loratester.ui.ElevationHeatmapLegendView
+        android:id="@+id/mapHeatmapLegend"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|start"
+        android:layout_marginStart="10dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginBottom="10dp"
+        android:elevation="4dp"
+        android:visibility="gone" />
+
+</FrameLayout>

app/src/main/res/layout/fragment_settings.xml

@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <com.google.android.material.textfield.TextInputLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/server_url">
+
+            <com.google.android.material.textfield.TextInputEditText
+                android:id="@+id/editServerUrl"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:inputType="textUri" />
+        </com.google.android.material.textfield.TextInputLayout>
+
+        <com.google.android.material.textfield.TextInputLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:hint="@string/telnet_host">
+
+            <com.google.android.material.textfield.TextInputEditText
+                android:id="@+id/editTelnetHost"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:inputType="text" />
+        </com.google.android.material.textfield.TextInputLayout>
+
+        <com.google.android.material.textfield.TextInputLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:hint="@string/telnet_port">
+
+            <com.google.android.material.textfield.TextInputEditText
+                android:id="@+id/editTelnetPort"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:inputType="number" />
+        </com.google.android.material.textfield.TextInputLayout>
+
+        <com.google.android.material.textfield.TextInputLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:hint="@string/rssi_regex">
+
+            <com.google.android.material.textfield.TextInputEditText
+                android:id="@+id/editRssiRegex"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:inputType="text" />
+        </com.google.android.material.textfield.TextInputLayout>
+
+        <com.google.android.material.textfield.TextInputLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:hint="@string/range_regex">
+
+            <com.google.android.material.textfield.TextInputEditText
+                android:id="@+id/editRangeRegex"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:inputType="text" />
+        </com.google.android.material.textfield.TextInputLayout>
+
+        <com.google.android.material.textfield.TextInputLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:hint="@string/device_display_name">
+
+            <com.google.android.material.textfield.TextInputEditText
+                android:id="@+id/editDeviceLabel"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:inputType="textCapWords" />
+        </com.google.android.material.textfield.TextInputLayout>
+
+        <com.google.android.material.switchmaterial.SwitchMaterial
+            android:id="@+id/switchTelnet"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/telnet_enabled" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:text="@string/battery_optimization_hint"
+            android:textSize="12sp" />
+
+        <Button
+            android:id="@+id/btnBatteryOptimization"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/battery_optimization" />
+
+        <TextView
+            android:id="@+id/deviceIdLabel"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:textSize="12sp" />
+
+        <Button
+            android:id="@+id/btnSaveSettings"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/save" />
+    </LinearLayout>
+</ScrollView>

app/src/main/res/layout/fragment_stats.xml

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/statsStatus"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:textSize="14sp" />
+
+        <TextView
+            android:id="@+id/statsPeerWarning"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="4dp"
+            android:textColor="#FF9800"
+            android:textSize="12sp"
+            android:visibility="gone" />
+
+        <com.grigowashere.loratester.ui.RadioComparePanel
+            android:id="@+id/radioComparePanel"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp" />
+
+        <Button
+            android:id="@+id/btnPushStats"
+            style="@style/Widget.Material3.Button.TonalButton"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/stats_push_peer" />
+
+        <Button
+            android:id="@+id/btnSimulate"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/simulate_telnet" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/stats_history_title"
+            android:textSize="14sp"
+            android:textStyle="bold" />
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/statsHistoryList"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:nestedScrollingEnabled="false" />
+
+    </LinearLayout>
+</ScrollView>

app/src/main/res/layout/item_chat.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:paddingStart="8dp"
+    android:paddingEnd="8dp"
+    android:paddingTop="4dp"
+    android:paddingBottom="4dp">
+
+    <LinearLayout
+        android:id="@+id/chatBubble"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="start"
+        android:background="#1A4A6E"
+        android:maxWidth="280dp"
+        android:orientation="vertical"
+        android:padding="8dp">
+
+        <TextView
+            android:id="@+id/chatAuthor"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textColor="#AAAAAA"
+            android:textSize="10sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/chatText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="2dp"
+            android:textColor="#EEEEEE"
+            android:textSize="13sp" />
+
+        <TextView
+            android:id="@+id/chatTime"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="2dp"
+            android:textColor="#888888"
+            android:textSize="9sp" />
+    </LinearLayout>
+</FrameLayout>

app/src/main/res/layout/item_history.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/historyLine"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:fontFamily="monospace"
+    android:paddingVertical="4dp"
+    android:textSize="11sp" />

app/src/main/res/layout/view_radio_compare.xml

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:paddingBottom="4dp">
+
+        <TextView
+            android:id="@+id/compareTxHeader"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textColor="#E94560"
+            android:textSize="12sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/compareRxHeader"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textColor="#4FC3F7"
+            android:textSize="12sp"
+            android:textStyle="bold" />
+    </LinearLayout>
+
+    <TableLayout
+        android:id="@+id/compareDynamicTable"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:stretchColumns="1,2" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/compareStaticToggle"
+        style="@style/Widget.Material3.Button.TextButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:minHeight="0dp"
+        android:padding="0dp"
+        android:text="@string/stats_static_toggle"
+        android:textSize="12sp" />
+
+    <TableLayout
+        android:id="@+id/compareStaticTable"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:stretchColumns="1,2"
+        android:visibility="gone" />
+
+</LinearLayout>

app/src/main/res/mipmap-anydpi/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/mipmap-anydpi/ic_launcher_round.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>