Communication Protocols in IoT
Communication Protocols in IoT In IoT, devices must talk to each other and to the cloud. The protocol stack shapes power use, latency, and reliability. Small sensors rely on light payloads, simple handshakes, and secure channels. Understanding common options helps you design a stable and scalable system. Application layer options include MQTT, CoAP, and HTTP. MQTT uses a publish/subscribe model with a small header. It works well over unstable networks and supports three QoS levels. CoAP is a RESTful protocol built for constrained devices and runs over UDP. It is efficient and supports observation, so clients can receive updates without polling. HTTP remains common because it is familiar, but it can add more overhead on tiny devices. For many IoT projects, combining MQTT or CoAP at the device level with a gateway simplifies management. ...