import paho.mqtt.client as mqtt

# El callback para cuando el cliente reciva un Connack de respuesta del servidor.
def on_connect(client, userdata, flags, rc):
    print("Conectado con el siguiente codigo  "+str(rc))
    #Suscribirse dentro de On_connect signidica que si perdemos la conexion
    #y nos reconectamos la suscripcion se renovara.
    client.subscribe(MQTT_topicSub)

# The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, msg):
    print(msg.topic+" "+str(msg.payload))


MQTT_broker = "m13.cloudmqtt.com"
MQTT_username = "fatvtybu"
MQTT_password = "KqZz_bJ2xfdL"
MQTT_topicSub = "jsonTopic"  #<---topico al que te vas a suscribir
MQTT_topicAlive = "Conection"#topico al que le vas a decir que ya estas conectad
MQTT_port = 12754
MQTT_clientID = "carwash pepe"#
client = mqtt.Client(client_id="", clean_session=True, userdata=None, protocol="MQTTv311", transport="tcp")
client.on_connect = on_connect
client.on_message = on_message
client.username_pw_set(MQTT_username,MQTT_password )
client.connect(MQTT_broker, MQTT_port, 60)
client.publish(MQTT_topicAlive,MQTT_clientID, qos=0, retain=False)
# Blocking call that processes network traffic, dispatches callbacks and
# handles reconnecting.
# Other loop*() functions are available that give a threaded interface and a
# manual interface.
client.loop_forever()