MQTT is a lightweight, publish/subscribe-based messaging protocol widely used in fields such as the Internet of Things (IoT). Below is a tutorial on using MQTT, covering basic concepts, environment setup, communication processes, and development examples: 1. Basic Concepts of MQTT1. Core Roles· Publisher: The device or application that sends messages.· Subscriber: The device or application … Read more
In today’s rapidly developing Internet of Things (IoT), efficient communication between a vast number of devices has become a critical challenge. Faced with unstable network environments and limited device resources, traditional HTTP protocols fall short. This is where the MQTT protocol, designed specifically for IoT, comes into play. What is MQTT? MQTT (Message Queuing Telemetry … Read more
As an engineer who has worked with the Bluetooth protocol stack for many years, today I want to delve into a crucial component of the Bluetooth protocol stack known as the L2CAP. Many people’s understanding of Bluetooth may be limited to concepts like “pairing” and “connecting,” but truly grasping its internal data flow mechanisms allows … Read more
1. What is MQTT? MQTT (Message Queuing Telemetry Transport) is a: Lightweight publish/subscribe messaging protocol Designed for low bandwidth and unstable network environments Particularly suitable for Internet of Things (IoT) device communication Plain Language Explanation: Imagine a delivery station (Broker), and you tell it: “I want to receive milk.” When the milk arrives, the delivery … Read more
In the last issue, we introduced the core of MQTT: The core of MQTT communication: Topic This time we will detail QoS, which stands for Quality of Service. (QoS) is a protocol between the message sender and receiver that defines the level of delivery guarantee for specific messages. Below, we will delve deeper into the … Read more
Translator | Li RuiReviewer | Sun ShujuanThe data created by humans on the internet and computers is not always accurate; human typing, scanning, photographing, or recording is not always reliable. But what if there are sensors on machines that collect data and can communicate with other machines? What if there is a protocol that allows … Read more
Follow,Star Public Account to not miss exciting content Source: Embedded Miscellaneous Although my practical development experience with Linux is still limited, I am aware that there are several methods for inter-process communication: pipes, message queues, shared memory, sockets, etc. In a certain project, MQTT was used as the method for inter-process communication, which felt quite … Read more
Recently, I have been revising the control architecture for the company’s IoT devices (vending machines). The reason for this is that the new partner equipment manufacturer has adopted a completely different communication protocol (MQTT). To ensure compatibility between the old and new devices while minimizing the impact on existing operations, I decided to restructure the … Read more
Note: Please be aware that there is a resource download method at the end of the article. Download and save it as soon as possible to avoid deletion! In-Depth Analysis of the MQTT Communication Protocol 📡 In the world of the Internet of Things (IoT), data transmission is core. When it comes to IoT communication … Read more
Recently, I used MQTT in my project and found it to be an excellent protocol, so I would like to share some related knowledge in hopes of helping everyone. 1 What is MQTT? MQTT is a lightweight message transport protocol used for communication between IoT devices and applications. Originally developed by IBM, it has now … Read more