In the ever-evolving world of the Internet of Things (IoT), ensuring seamless connectivity between devices is crucial for building efficient and reliable systems. One of the key components that help maintain this connectivity is the IoT communication relay module. These modules serve as a bridge between devices that may otherwise struggle to communicate due to range limitations, network interference, or protocol differences. This article will explore the role of IoT communication relay modules in enhancing connectivity, their working principles, types, and real-world applications.