The main components of a smart home system include smart devices, a central hub, and a network connection. Smart devices, such as lights, thermostats, and security cameras, can be controlled remotely or automated based on user preferences. The central hub acts as a controller that connects and communicates between various smart devices and allows users to manage them through a mobile app. Connectivity is typically provided through Wi-Fi, Zigbee, or Z-Wave. Together, these elements enhance home automation, security, and energy efficiency.