This book teaches you to create smart home IoT solutions using Raspberry Pi and microcontrollers like Arduino, NodeMCU (ESP8266), and ESP32. You will learn to program these microcontrollers, control relay modules, and use sensors for data collection. The guide covers using OpenHAB, InfluxDB, Mosquitto MQTT Broker, and Grafana with Raspberry Pi, enabling a unified system without coding. It also shows how to connect OpenHAB to Alexa or Google Home for voice commands and automate tasks like lighting. Bonus content includes using Raspberry Pi GPIO pins, AI-based hand gesture and face detection, and Docker containers.