In 1896, Italian inventor Guglielmo Marconi achieved the first wireless communication in human history. From then on, humanity opened the door to the world of radio. Guglielmo Marconi (1874-1937) The radio telegraph at that time used a spark-gap transmitter, and the transmitted signal content was Morse code. This radio telegraph could not receive and send … Read more
This design guide discusses how to design RS-485 interface circuits. It covers the necessity of balanced transmission line standards and provides an example of process control design. The article also discusses line loading, signal attenuation, failure protection, and current isolation under different headings. 1. Why Balanced Transmission Line Standards Are Needed The focus of this … Read more
Table of Contents 1. Key Technical Features of RS-485 2. Application Scenarios 3. Standards 4. Advantages of Using Differential Signal Transmission 5. Similarities and Differences Between RS-422 and RS-485 5.1 Differences in Bus Architecture 5.2 Differences in Common Mode Voltage Range 5.3 Differences in Input Impedance of Receivers 5.4 RS-485 Transceivers with Enable Pins 6. … Read more
The main differences between RS-232 and RS-485 are: 1. The transmission methods are different. RS-232 uses an unbalanced transmission method, known as single-ended communication. In contrast, RS-485 uses balanced transmission, which is a differential transmission method. 2. The transmission distances are different. RS-232 is suitable for communication between local devices, with a transmission distance generally … Read more
Serial Communication refers to a communication method for data transmission through serial ports. Data is transmitted bit by bit through data signal lines and ground lines. Common serial ports include RS-232, RS-485, and RS-422. It is important to note that serial ports are only interface standards, specifying the electrical standards of the interface, and not … Read more
1. History of Serial Ports First of all, the serial port is an essential tool for anyone working with hardware and embedded software, especially when debugging a system with an MCU or CPU. Generally, the first thing we do during debugging is to light up the GPIO, and the second is to establish a communication … Read more