In this book we are going to;
Build a breadboard circuit using the ESP32 board,
a DHT22 Sensor, and a Relay.
Install & set-up the Arduino IDE & Libraries.
Prepare and upload ESP32 code and support pages,
for a Web Server program serving an HTML page broadcasting,
temperature and humidity value to clients as well as allowing,
control of Relay, via any Web Browser on local Wi-Fi network.
All development under Windows 10/11, downloadable code.