In today’s booming era of the Internet of Things (IoT), microcontrollers play a crucial role as core control units. Bluetooth technology, with its convenient wireless communication characteristics, has expanded the application space for microcontrollers. The STM32 series microcontrollers are favored by developers for their high performance and low power consumption. 1. Overview of Bluetooth (1) … Read more
Source | Chip Xiao Er’s Afternoon Tea Knowledge Circle | Entering the Camera Lens/Module/CMOS Chip Group, Add WeChat yijijuechen2023 As a widely used communication bus between automotive ECUs, CAN has some fundamental questions related to its application, such as Since it is a bus, why aren’t all connected together, and why are so many CAN … Read more
RS232 and RS485 are common interfaces in low voltage applications. Many friends have mentioned the differences between them, so today let’s learn about them together. 1. Physical Structure of the Interfaces 1. RS232 Interface: One of the computer communication interfaces, RS-232 interfaces typically appear in the form of 9 pins (DB-9) or 25 pins (DB-25). … Read more
Ke Ruida Nationwide Service Hotline: 400-666-1916 1. Different Transmission Methods. RS-232 uses an unbalanced transmission method, known as single-ended communication. In contrast, RS-485 employs balanced transmission, i.e., differential transmission. 2. Different Transmission Distances. RS-232 is suitable for communication between local devices, with a transmission distance generally not exceeding 20 meters. RS-485, on the other hand, … Read more
Introduction: This article aims to discuss knowledge about TCP. Please forgive any inappropriate metaphors. In the fourth year of the Tianqi era of the Ming Dynasty, early morning. As dawn broke, I drove a horse-drawn cart full of goods to the South City Gate, which was the central location for handling goods. A line of … Read more
This article is a prequel to “The Ming Dynasty Postman of TCP/IP”, discussing how the ministers of the Ming Dynasty’s cabinet designed the TCP/IP network. During the Tianqi period of the Ming Dynasty, Emperor Zhu Youjiao was obsessed with carpentry and heavily relied on the eunuch Wei Zhongxian, having not attended court for a long … Read more
Canopen is an open and widely used fieldbus. This article mainly introduces the various products from Schneider that support Canopen communication. Canopen Master Stations: Twido, M238, M258, M241, M251, LMC058/LMC078, M340, Premium (The number of supported slave devices varies for each master station; please refer to the manual for details.) Canopen Slave Stations: ATV312/61/71 IMC … Read more
The PLC is a controller used in industry. When selecting this device, we primarily consider whether its performance meets our needs and whether the price is appropriate. Which is more important, price or performance? Clearly, performance is paramount; if the machine cannot meet the requirements, what does the price matter? Alternatively, if the performance is … Read more
1, NMT Messages CANopen devices have three states: pre-operational, operational, and stopped. By default, after startup, they automatically enter the pre-operational state, during which PDO messages cannot be sent. If PDO messages need to be sent, the device must be manually switched to operational (run) state after startup. The following message can be sent to … Read more
Table of Contents 1 Overview of CAN 1.1 What is CAN 1.2 History of CAN 1.3 CiA Organization 1.4 OSI Model of CAN 1.5 Characteristics of CAN 1.6 Topology of CAN 1.7 Data Frame of CAN 1.8 Common CAN Application Layer Protocols 2 Overview of CANopen 2.1 What is CANopen 2.2 CANopen Network Model 2.3 … Read more