code: def extended_status_request(self):
          
          self._status_received = False
          user_data = Userdata({'d1': self.group,
                                'd2': 0x00})
          cmd = ExtendedSend(self._address,
                             COMMAND_EXTENDED_GET_SET_0X2E_0X00,
                             userdata=user_data)
          cmd.set_checksum()
          self._send_method(cmd, self._status_message_received, True)
docs: Send status request for group/button.