The technology that enables smart home devices to communicate with each other is called IoT, or the Internet of Things. IoT allows various devices, such as smart locks, thermostats, and lights, to connect to the internet and interact with each other, facilitating automation and remote monitoring. Using protocols like Zigbee and Z-Wave, smart home systems can operate seamlessly, providing users with enhanced convenience and control over their living environments. IoT integration is crucial for creating cohesive smart home ecosystems.