In embedded development, the Internet of Things, and debugging communication modules, there is an important tool that you will inevitably encounter — AT Commands. Whether it is making calls and sending messages with GSM modules, connecting to the internet with WiFi modules, pairing with Bluetooth modules, or obtaining positioning with GNSS modules, AT commands serve … Read more
Overview:The implementation method involves connecting field thermocouples to the temperature acquisition module, which connects via RS-485 to a serial server. The serial server converts the RS-485 signal to Modbus TCP protocol, allowing the DCS to collect data from the serial server. Main Tasks: Configuration of the multi-point temperature acquisition module; configuration of the serial server; … Read more
In real life, we always need to interact with others and share information. Microcontrollers also need to communicate with various devices. For example, the display instrument in a car needs to know the engine speed and the operating parameters of the motor, so the display instrument must obtain data from the car’s underlying controller. This … Read more
Using analog serial port to drive74HC164, there is always a slight glow in segments that should not be lit, commonly referred to as ghosting, which is particularly noticeable at night. However, using serial port driving yields much better results; when external light is dim, ghosting is slightly visible but does not significantly affect viewing. This … Read more
Table of Contents Chapter 1 Overview of Embedded Systems Video Explanation: 14 minutes, 1 episode 1.1 Definition of Embedded Systems 1.1.1 Embedded Microprocessors 1.1.2 Input/Output Interfaces 1.2 Components of Embedded Systems 1.3 Classification of Embedded Systems 1.3.1 Classification by Processor 1.3.2 Classification by Operating System 1.3.3 Classification by Integration Level and Application Layer 1.4 Characteristics … Read more
Serial cables are divided into straight-through and crossover types. Straight-through cables are generally used to extend connections between a PC and a device, connecting pins 2, 3, and 5 to pins 2, 3, and 5 respectively. This is because PCs usually have male connectors while devices often have female connectors, making them universally compatible for … Read more
Dear friends, hello everyone! Today, the topic we are going to learn about is the serial communication protocol of microcontrollers (MCUs). This content is quite important and relatively professional, but I will try to explain it in a simple and understandable way. First, let’s see why we need serial communication? Communication is the Basis of … Read more
WeChat SearchTechnical Training In industrial control, PLC is a device that runs stably, has powerful performance, and is easy to program, which is favored by many enterprises. Generally, communication between the PLC and control devices is mostly through serial communication interfaces, controlled by their corresponding communication protocols, among which the most common are RS485 and … Read more
Introduction:RS-232 and RS-485 are both industrial serial data interface standards, initially formulated and published by the Electronic Industries Alliance (EIA), with RS-232 released in 1962, named EIA-232-E, as an industrial standard to ensure compatibility between products from different manufacturers. To expand its application range, EIA also established the RS-485 standard in 1983, adding multipoint, bidirectional … Read more
1. Basics of RS232 RS-232-C is a serial physical interface standard established by the Electronic Industry Association (EIA) in the United States. RS is the abbreviation for “Recommended Standard,” 232 is the identification number, and C indicates the revision number, representing the latest modification of RS232 (1969). Prior to this, there were RS232B and RS232A. … Read more