Python MQTT connection to Azure Iot Hub

Question

I want to connect to Azure Iot Hub, with Python MQTT.

An username and SAS token is required by Iot Hub. This is my code:

import paho.mqtt.client as m         


        

Answer 1

There is now an official Python SDK to connect devices to Azure IoT Hub: https://github.com/Azure/azure-iot-sdks/tree/master/python/device

This sample demonstrates how to connect using the MQTT protocol.

Basically, here's how it works:

1. create a device client and specifies MQTT for the protocol
2. set the callback that will be called when a message is received
3. use send_event_async to send messages to your Azure IoT Hub instance.

from iothub_client import *

def send_confirmation_callback(message, result, userContext):
    print "Confirmation[%d] received for message with result = %s" % (userContext, result)

def receive_message_callback(message, counter):
    buffer = message.get_bytearray()
    size = len(buffer)
    print "Received Message"
    print "    Data: <<<%s>>> & Size=%d" % (buffer[:size], size)
    return IoTHubMessageDispositionResult.ACCEPTED

iotHubClient = IoTHubClient(connectionString, IoTHubTransportProvider.MQTT)
iotHubClient.set_message_callback(receive_message_callback, 0)
iotHubClient.send_event_async(message, send_confirmation_callback, 0)