Hands-On Edge Analytics with Azure IoT

Creating the Message class

For sending messages from the edge device to the cloud, we will use the MQTT protocol. We only need to publish to our MQTT server. This makes our code very simple. In Chapter 6, Using MicroPython for Edge Analytics, we set up a CloudMQTT account. Please refer to this account for the values needed in this step:

1. In Thonny, create a new Python file in the project folder (Smart Doorbell).
2. Copy the following code and save the file as Message.py:

import paho.mqtt.client as mqttclass Message:    def update(self, face_name):        mqttc = mqtt.Client(client_id="smart-doorbell")        mqttc.username_pw_set('<<username>>', '<<password>>')        mqttc.connect('<<server name>>', <<port number>>)        mqttc.publish("face_name", face_name)

3. Let's test ...