1. Introduction to HTTP HTTP (Hypertext Transfer Protocol) is an application layer protocol used for transmitting hypertext (such as HTML files) over the network. It is based on the TCP/IP protocol and serves as the foundation for data communication on the World Wide Web. Below, we will detail HTTP from multiple aspects. 2. Development History … Read more
In internet communication, TCP (Transmission Control Protocol) and HTTP (Hypertext Transfer Protocol) are both key protocols, but their roles and applicable scenarios are completely different. Many people may be confused: 1. Since TCP can already transmit data, why do we need HTTP? 2. When should we use TCP directly, and when should we use HTTP? … Read more
Hello everyone, today I want to share a super useful Python library – aiohttp! Do you often need to send network requests in your programs? If the number of requests increases, the program can become incredibly slow? Don’t worry, aiohttp is here to solve this problem! It allows our network requests to fly, significantly improving … Read more
[S7-1200]: MQTT Protocol Communication with Siemens PLC for IoT Environmental Monitoring Application Overview Hello friends! Today I want to share an amazing project with you—using the Siemens S7-1200 PLC to achieve IoT environmental monitoring through the MQTT protocol! Imagine, your PLC not only controls the equipment in the factory but also uploads environmental data (such … 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
1. Introduction 1. Why use Ethernet for communication? Ethernet refers to a local area network that complies with the IEEE 802.3 standard. It is a type of internet technology, and since it occupies the highest proportion in networking technology, many people directly equate Ethernet with the internet. However, IEEE also has other local area network … Read more
TCP/IP ProtocolThe TCP/IP protocol (Transmission Control Protocol/Internet Protocol) is the most widely used protocol today, encompassing over 100 protocols used on the Internet, with the two most important being TCP and IP. Due to its cross-platform and routable characteristics, TCP/IP enables the interconnection of networks and communication across different network segments. This has led many … Read more
After introducing the content related to OPC UA communication, we have basically covered the main communication buses and protocols related to industrial automation. So, why have we focused on communication for nearly two years? Of course, for PLC/PAC engineers, or for electrical engineers or automation engineers, the core is not just communication; there are also … Read more
CANopen to DeviceNet Slave — ADFweb Converter – Guangzhou Xinyu IoT Author: Zou Wuyi Mobile185-020-77899 Email: [email protected] 1 Product Features HD67134 – A1 is a CANopen / DeviceNet slave converter. It has the following features: Provides triple isolation between CANopen and power, CANopen and DeviceNet, and power and DeviceNet. Can be mounted on a 35mm … Read more
CANopen to CANopen – ADFweb Gateway Converter–Guangzhou Xinyu IoT Author: Zou Wuyi Mobile185-020-77899 [email protected] 1、Product Features: The CANopen to CANopen gateway has the following features: Realizes high-level bidirectional conversion of information between two different CANopen buses; Provides electrical isolation between the two buses; Can associate device module objects located on different buses, which can be … Read more