The ESP32 chip is a well-known chip for developing Internet of Things (IoT) applications. This book discusses how to work with the ESP32 board using MicroPython. Below is a list of topics in the book: preparing the development environment, setting up MicroPython, programming GPIO, PWM and analog input, working with I2C, working with UART, working with SPI, working with the DHT module, working with Wi-Fi.