ESP32 WiFi and MQTT
In this step we will pick up the ESP32 circuit again and update the program to use the WiFi capability of the ESP32 microcontroller to connect to and exchange data with an MQTT Broker.
Since the circuit has already been assembled and all components connected, only the program needs to be updated.
Code
The code for this circuit is distributed across multiple files, so will not be displayed here. It will be available for download for subscribers.