An Introduction to the Internet of Things

1. For this lesson we will be using an ESP32 WROOM 32 microcontroller board.
2. We will connect a DHT11 or DHT22 temperature/humidity sensor and an LDR light level sensor to the board.
3. We will program the board, using the Arduino IDE, to publish data from the sensors to an MQTT broker.
4. We will then subscribe to the MQTT broker using the MQTTX desktop app

The aim of the lesson is to introduce learners to the Internet of Things. The emphasis of the lesson is not on electronics or on programming microcontrollers but rather how devices connect and communicate on the Internet of Things to produce data that we can then analyse for research purposes.