code: def _parse_message_to_mqtt(self, data):
          
          msg = Message(data, self)
          payload = str(msg.payload)
          msg.payload = ''
          # prefix/node/child/type/ack/subtype : payload
          return ('{}/{}'.format(self._out_prefix, msg.encode('/'))[:-2],
                  payload, msg.ack)
docs: Parse a mysensors command string.
  
          Return a MQTT topic, payload and qos-level as a tuple.