Azure IoT Hub Sending messages using Python via mqtt

Question

So, I created IoT hub, device, topic and subscription post setting up my Azure. Now I want to send a message via mqtt using a python script. What should I do to see it on the azure page? 

This is my code.

def on_connect(client, userdata, flags, rc):
  print ("Device connected with result code: " + str(rc))
def on_disconnect(client, userdata, rc):
  print ("Device disconnected with result code: " + str(rc))
def on_publish(client, userdata, mid):
  print ("Device sent message")

client = mqtt.Client(client_id=device_id, protocol=mqtt.MQTTv311)

client.on_connect = on_connect
client.on_disconnect = on_disconnect
client.on_publish = on_publish

client.username_pw_set(username=iot_hub_name+".azure-devices.net/" + device_id, password=sas_token)

client.tls_set(certfile=None, keyfile=None, cert_reqs=ssl.CERT_REQUIRED, tls_version=ssl.PROTOCOL_TLSv1, ciphers=None)
client.tls_insecure_set(False)

client.connect(iot_hub_name+".azure-devices.net", port=8883)

client.publish("devices/" + device_id + "/messages/events/", "{id=123}", qos=1)
client.loop_forever()

The issue being, I don't know how to specify the topic.

client.publish("devices/" + device_id + "/mytopicname/messages", "{id=123}", qos=1)

This thing I tried disconnects with code 1.

Answer 1

The thing is that IoT Hub is not a general-purpose pub-sub messaging broker. It's meant to support only the documented topic names and filters. 

Try reading this doc (Communicate with your IoT hub using the MQTT protocol).

Hope this helps!!

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Thank you!!