Returning packet value

[jericho]

Hi
I was thinking about whether it could be possible to modify mqttudp.engine.listen(recv_packet) to return the packet value other than just printing it out in function.
I feel that way I could dictate the behavior of my system with ease.

what do you think?

[Dmitry Zavalishin]

Please tell me what file you’re talking about?

[Dmitry Zavalishin]

If you're talking about Python implementation, then please note that mqttudp.engine.listen argument is a function that is called with packet received.

Pease refer to lang/python3/examples/mqtt_udp_to_broker.py

def recv_packet_from_udp(pkt):
    global last
    if pkt.ptype != mqttudp.engine.PacketType.Publish:
        return
    if last.__contains__(pkt.topic) and last[pkt.topic] == pkt.value:
        return
    last[pkt.topic] = pkt.value
    #print( topic+"="+value )
    log.info( "UDP to broker "+pkt.topic+"="+pkt.value )
    bclient.publish(pkt.topic, pkt.value, qos=0)


if __name__ == "__main__":
    print( "Will resend all the MQTT/UDP traffic to MQTT broker at "+MQTT_BROKER_HOST )

    #global last

    bclient = broker.Client()
    #client.on_connect = on_connect
    #client.on_message = on_message

    bclient.connect(MQTT_BROKER_HOST, MQTT_BROKER_PORT, 60)
    #print("connected", bclient)
    log.info( "connected " + str(bclient) )

    blt = threading.Thread(target=broker_listen_thread, args=(bclient,))
    blt.start()

    mqttudp.engine.listen(recv_packet_from_udp)
    blt.join()

Here recv_packet_from_udp is called for each incoming packet.