as

collector/protocol.py

@@ -67,3 +67,15 @@ def pack_slot_config(slot: int, flags: int, period_s: int) -> bytes:
 
 def report_to_bytes(r: SensorReport) -> bytes:
     return pack_report(r.battery, r.flags, r.dist)
+
+
+def pack_interval_min(minutes: int) -> bytes:
+    """2-byte LE uint16 report interval in minutes."""
+    m = max(1, min(0xFFFF, int(minutes))) & 0xFFFF
+    return bytes((m & 0xFF, (m >> 8) & 0xFF))
+
+
+def unpack_interval_min(data: bytes) -> Optional[int]:
+    if data is None or len(data) != 2:
+        return None
+    return data[0] | (data[1] << 8)