readFragmentId method
Implementation
Future<String> readFragmentId() async {
final bleService = await getBleService();
final fragmentIdCharacteristic = bleService.characteristics.firstWhere(
(char) => char.uuid.str == ViamBluetoothUUIDs.fragmentUUID,
orElse: () => throw Exception('fragmentIdCharacteristic not found'),
);
final fragmentIdBytes = await fragmentIdCharacteristic.read();
return utf8.decode(fragmentIdBytes);
}