MQTT is a lightweight messaging protocol widely used in the Internet of Things (IoT) and embedded systems. It adopts a publish/subscribe model, allowing devices to efficiently exchange messages. Below is a comprehensive explanation of the MQTT protocol’s application and implementation in embedded systems. Overview of MQTT Protocol · Lightweight: MQTT is designed for low overhead, … Read more
Reprinted from CSDN: https://blog.csdn.net/an520_/article/details/125479812 UART, SPI, I2C, and other serial communications are very common communication methods in embedded development. The underlying communication principles of these protocols are not difficult, but many beginners struggle to learn them. Today, I will share some common underlying data transmission principles. 1. UART Serial Port UART: Universal Asynchronous Receiver/Transmitter. The … Read more
The serial port enables reliable communication between two terminal devices, functioning as the transport layer in this process. This article focuses on the data protocol. Similar Scenarios Hey! Hey! This is Dong Guai! Please respond! Please respond! over! Such dialogues are often seen in war-themed films when calling teammates through walkie-talkies or related wireless devices. … Read more
Embedded devices need to set parameters during operation, which is often accomplished by a PC. A communication protocol must be designed for both parties, with three representative protocols as follows: As can be seen from the table above, embedded devices generally have limited memory and computational performance, so fixed binary is the preferred communication protocol. … Read more
‖ System Learning Life is like a marathon; sometimes you need to take a break to go fishing to go further. Hey! It’s time for a break again. A couple of days ago, I shared about Understanding a Communication Protocol: PROFINET Understanding a Communication Protocol: PROFIBUS Today, let’s learn about the new CANopen communication protocol. … Read more
Click the blue text Follow us 1. Introduction 1. Concept The SPI (Serial Peripheral Interface) bus protocol is a full-duplex synchronous serial bus communication protocol used for data transmission between integrated circuits. The SPI bus typically consists of one master device and multiple slave devices, each slave device has a separate chip select signal, and … Read more
Today, I will share some common underlying data transmission principles of communication; UART, SPI, and I2C are very common communication methods in embedded development, and the fundamental communication principles of these methods are not difficult to understand. 1. UART Serial Communication UART: Universal Asynchronous Receiver/Transmitter. The UART serial port is the most common type of … Read more
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This section continues to discuss another serial communication interface in embedded hardware communication protocols – IIC. Compared to UART serial protocol and SPI serial peripheral interface protocol, IIC has its unique features. Introduction IIC (Inter-Integrated Circuit), integrated circuit bus. IIC stands for Inter-Integrated Circuit (integrated circuit bus), this type of bus was designed by Philips … Read more
01 IIC Bus (Inter－Integrated Circuit) I2C (Inter-Integrated Circuit), also known as IIC or I2C bus, is a serial communication protocol used to connect multiple devices over short distances. It was first introduced by Philips in 1982 and is now widely used for communication between embedded systems, sensors, memory, and other peripheral devices. Here are some … Read more