[Abstract] The 485 bus is often used in the wiring of common access control systems, but most people do not understand it. Below, the editor will discuss the 485 bus protocol and the related knowledge of the 485 bus transmission distance. 485 Bus Protocol 485 Bus Protocol When the communication distance is required to be… … Read more
In bus systems, both RS-485 and CAN-bus are commonly used buses, each with unique characteristics and application scenarios, widely applied. Today, let’s discuss their differences. 1. What is RS-485? RS-485 is a serial communication protocol that has been around since the mid-1980s, originally defined for industrial market applications. It uses differential signaling with negative logic, … Read more
When using PLCs, you will encounter many communication protocols and communication interfaces. 01 What Is Serial Communication? A serial port is a very common device communication protocol on computers (do not confuse it with Universal Serial Bus or USB). Most computers have two RS232-based serial ports. The serial port is also a common communication protocol … Read more
Click the above“Mechanical and Electronic Engineering Technology” to follow us 1. Serial Communication Principles Serial communication refers to a method of transmitting data bit by bit between peripherals and computers through data signal lines, ground lines, etc. Serial ports are a type of interface standard that specifies the electrical standards of the interface, but does … Read more
Search on WeChat Technical Training RS-232, RS-422, and RS-485 are all standards for serial data interfaces; Communication issues are similar to traffic issues, with various situations such as high speed, low speed, congestion, and interruptions. If we compare serial communication to traffic, UART is like a station, and a frame of data is like a … Read more
Engineers familiar with embedded development are certainly no strangers to serial debugging tools. These tools help engineers capture, analyze, and debug data transmitted via serial ports, ensuring system stability and performance. This article will delve into several commonly used serial debugging tools by engineers, hoping to assist you. 1. SSCOM: A Representative of Stability and … Read more
Frame The UART communication standard uses an 8-bit binary number as a frame, with the least significant bit first, transmitted bit by bit. To distinguish each frame, a 0 is used as a start marker before each frame, followed by a 1 as a stop marker. Before the stop marker, an optional “parity bit” can … Read more
When we talk about serial ports, we generally refer to UART (Universal Asynchronous Receiver / Transmitter）, the Universal Asynchronous Transceiver. The serial port is one of the most commonly used serial peripherals by engineers, but various issues are often encountered in practical applications. For example: losing one byte of data. Today, we will discuss UART-related … Read more
Introduction Previously, we introduced the basic knowledge of I2C and SPI. In this chapter, we will discuss UART (Universal Asynchronous Receiver/Transmitter), which is used for communication between internal and external devices of a computer. Data transmission within a computer is parallel, while data transmission with external devices is often serial. Therefore, a chip is needed … Read more
Serial Communication My Diary 2024 Is the most basic communication method faced by electrical engineers, with RS-232 being the simplest among them. Many beginners often struggle to understand the relationship and differences between UART and RS-232, RS-422, RS-485. This article will discuss these concepts to help clarify their relationships. If we compare serial communication to … Read more