readValue method
Reads the value of the characteristic.
Implementation
Future<List<int>> readValue({int? offset}) async {
var options = <String, DBusValue>{};
if (offset != null) {
options['offset'] = DBusUint16(offset);
}
var result = await _object.callMethod(_gattCharacteristicInterfaceName,
'ReadValue', [DBusDict.stringVariant(options)],
replySignature: DBusSignature('ay'));
return result.returnValues[0].asByteArray().toList();
}