The technology used to connect devices in a smart home system typically includes Internet of Things (IoT) protocols such as Wi-Fi, Zigbee, or Z-Wave. These technologies allow various devices like lights, sensors, and thermostats to communicate with each other and with the user through a central hub or directly via cloud services. Smart home systems often rely on mobile apps or voice assistants for user interaction, enhancing automation and control. Overall, this connectivity makes home management more efficient and convenient.