The FX3U is a compact PLC, and familiarizing ourselves with it is a necessary step for electrical beginners. However, when using FX3U for communication, most people only utilize its serial communication capabilities, and many have not experienced Ethernet communication. Today, we will take a detailed look at the FX3U Ethernet communication module, FX3U-ENET-L.Software can be … Read more
The resource site is now online, and more resources can be shared. Welcome to visit: https://resources.zainzh.top Resource Introduction Resource Name: Writing a TCP/IP Protocol Stack from Scratch Applicable Platforms: Multi-platform Start from zero lines of code to write a small, highly portable TCP/IP protocol stack, deeply understanding the principles of network protocols and code implementation. … Read more
In this issue, we will take a detailed look at the family of industrial protocols. There are many industrial protocols, some proprietary and some universal. We will analyze a few commonly used and mainstream protocols. Before we begin, let’s review the relationship between the OSI seven-layer model and the TCP/IP model, as well as the … Read more
Introduction to HTTP 1. HTTP Versions Since the invention of the HTTP protocol, it has undergone several version modifications, namely <span><span>HTTP/0.9</span></span>，<span><span>HTTP/1</span></span><span><span>.0</span></span>，<span><span>HTTP/1.1</span></span> and <span><span>HTTP/2</span></span>。Currently, the most widely used version is <span><span>HTTP/1.1</span></span>，which is the focus of this article. 2. TCP/IP Protocol Before learning about the HTTP protocol, let’s first understand the TCP/IP protocol. It serves as the … Read more
Hello everyone. This is a new series. In this series, I will introduce you to concepts related to computer networking.Computer network technology is a mandatory subject for the spring college entrance examination, highlighting the importance of this field. Don’t be afraid. I will guide you to gradually understand it. Over time, you will learn this … Read more
Every time you click a link or send a message, it’s like initiating a city delivery. How does your data accurately find its destination without traffic jams or misdeliveries? This relies entirely on the TCP/IP protocol suite, a sophisticated system of ‘urban planning’ and ‘traffic rules’.[Introduction: Resonating with Pain Points]Have you ever wondered:Why can the … Read more
Source: Linux Technology Enthusiast What exactly happens to a complete network packet from the network card to the application? Why can zero-copy technology improve network performance by dozens of times? As operations engineers, we deal with various network issues every day. But do you really understand how, when a user clicks a link, the packet … Read more
When we effortlessly browse the web, send emails, or watch videos, data is traveling at the speed of light between billions of devices worldwide. Behind this orderly process lies not magic, but a carefully designed set of rules—the TCP/IP protocol. It is hailed as the “foundation” of the internet and can even be considered the … Read more
First, let’s demonstrate the effect.The host computer and the embedded system are decoupled through serial communication, meaning changes in the implementations of the host and embedded systems do not affect the interface programming.There is a term in object-oriented design called: “programming to an interface.” This suggests that programming based on class interfaces is less pure … Read more
Imagine you want to send a letter to a friend far away. What do you need to do? You put the letter in an envelope, write the recipient’s address and postal code, add your own address, and finally drop it in the mailbox. This entire process is exactly like how your computer sends data over … Read more