Publish-Subscribe

Protocols For IoT: MQTT, CoAP, and More Devices in homes and factories speak with simple rules. Two popular choices are MQTT and CoAP, each with its own strengths. This guide explains how they work and how to pick the right protocol for your project. MQTT: a light, brokered option MQTT uses a publish-subscribe model. Sensors publish messages to topics, and a central broker forwards them to subscribers. This setup fits telemetry, remote control, and apps that need reliable delivery in tight networks. QoS levels 0, 1, and 2 let you tune speed and reliability. Keep-alive pings help detect broken links, and TLS protects data in transit. When used well, MQTT scales from a few devices to thousands. ...

Communication Protocols: From HTTP to MQTT As devices and apps connect more often, you will encounter different communication styles. HTTP remains the backbone of the web, while MQTT shines on low bandwidth or unstable networks. This guide explains how they work and when to use them. HTTP: the baseline HTTP operates on a request–response model. A client asks for data with GET, or sends data with POST, PUT, or PATCH. Each call carries headers, sometimes a JSON body, and a status code on reply. The system is stateless by default, which makes servers easy to scale and cache friendly. The downside is the overhead: headers, repeated connections, and polling when data arrives irregularly. For web APIs, REST over HTTP remains common because it is predictable and well supported. ...

Communication Protocols in the Digital Age: From HTTP to MQTT Across the digital world, different protocols suit different jobs. HTTP powers the web and APIs; MQTT keeps many small devices talking with low bandwidth and steady reliability. The choice matters for speed, energy use, and security. HTTP, HTTPS, and REST are designed for request–response interactions between clients and servers. They work well when users fetch pages or data, and when responses can be cached. But they can be heavy for devices with limited power or unstable networks. ...

Communication Protocols: From TCP/IP to MQTT Protocols are the rules that let devices talk. The Internet rests on TCP/IP, a sturdy suite that handles address, routing, and reliable data transfer. MQTT offers a different kind of conversation: a lightweight, publish-subscribe protocol designed for small devices and unreliable networks. Understanding both helps you build systems that are fast, scalable, and easy to maintain. TCP/IP basics matter. IP handles addressing and routing, while TCP provides a reliable stream with a handshake. If a network drops a packet, TCP may retry and reorder data. UDP is faster but unreliable. MQTT sits on top of TCP, so it inherits reliability, but it abstracts delivery through a broker and topics rather than direct point-to-point sends. ...

Communication Protocols: From HTTP to MQTT Protocols set the rules for machines to talk. The web leans on HTTP, a general and flexible choice. In the Internet of Things, MQTT was built for small devices that send short messages over simple networks. Between HTTP and MQTT, other options exist, each built for a different need. Understanding these basics helps you pick the right tool for a project. HTTP: the workhorse of the web HTTP shines in human-facing and web-friendly tasks. It follows a request–response pattern, and servers stay stateless by design. Communication happens over TCP, which means reliable delivery and ordered data, especially when TLS is used for security. Headers and body carry metadata and data formats like JSON or HTML. The model is easy to cache and scale, which helps with web pages, APIs, and services that need broad adoption. ...