def extended_status_request(self):
        """Send status request for group/button."""
        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)