SerialBLEInterface.cpp — added esp_bt.h include and three esp_ble_tx_power_set calls at +9 dBm after BLEDevice::init(), covering default, advertising, and scan power types.
MyMesh.h — FIRMWARE_VER_CODE bumped from 10 → 11.
MyMesh.cpp — The RESP_CODE_DEVICE_INFO frame construction now:
Byte 2: sends 0xFF (sentinel) when MAX_CONTACTS > 510, otherwise the normal MAX_CONTACTS / 2. Older apps interpret 0xFF as 510 contacts — completely harmless.
Bytes 80-81 (new, appended after the version string): uint16_t little-endian with the true MAX_CONTACTS value. Apps that understand v11+ read it here. Apps < v11 ignore trailing bytes — the BLE/serial frame protocol is length-delimited, so extra bytes at the tail are safe.
platformio.ini — Both BLE builds (meck_audio_ble, meck_4g_ble) bumped from 510 → 2000.
mymesh.cpp: writeContactRespFrame return type change (return _serial->writeFrame() result)
checkSerialInterface() batch-fill loop.