An IoT communication relay module is a hardware component designed to bridge the gap between IoT devices and physical world applications. The core function of this module is to control the switching of electrical circuits remotely, allowing users to turn devices on or off via various communication protocols. These modules typically integrate a relay switch with wireless communication capabilities, such as Wi-Fi, Bluetooth, Zigbee, or LoRa. By doing so, they enable IoT devices to interact with both local controllers and remote systems, providing seamless connectivity and real-time control.