RS-232 is a serial communication standard established by the Electronic Industries Alliance (EIA) in 1962, originally used to connect computers (DTE, Data Terminal Equipment) to modems (DCE, Data Communication Equipment). Although it has gradually been replaced by USB, Ethernet, and other technologies in recent years, its simplicity and reliability still secure its place in industrial … Read more
Introduction This content is an important chapter in the STM32 FreeRTOS smart home project. Through this content, you will master IoT applications based on the ESP8266 Wi-Fi module with STM32. The cloud platform used in this session is Alibaba Cloud. This lays the foundation for subsequent hardware control through an app designed with Android Studio. … Read more
In various fields such as industrial control and smart home systems, communication between devices is a key aspect of achieving system functionality. The RS-485 bus, with its strong anti-interference capability, long transmission distance, and multi-node communication advantages, has become a widely used serial communication standard. The 51 microcontroller, as a classic entry-level microcontroller, can achieve … Read more
Developers working on embedded systems have certainly encountered issues such as tedious programming, difficult debugging, and lengthy log collection. Today, I would like to recommend a powerful tool—DAPLink—that provides a one-stop solution for programming, debugging, and serial logging, making the process incredibly smooth! What is DAPLink? In simple terms, DAPLink is firmware that runs on … Read more
Click the blue text above to follow our public account, where we share a LabVIEW case every day. The NI Modbus Library (ni_lib_modbus_library-1.2.1.42.vip) is a dedicated communication library developed by NI for LabVIEW, based on a modular design concept. It encapsulates the core functionalities of the Modbus protocol, providing engineers with a graphical programming interface … Read more
1 Introduction In a formal project, I encountered a problem during serial communication where a sequence of data was unexpectedly interrupted by a 00. The data received from the hardware FIFO was correct, but the data received at the upper layer was abnormal. This issue might be obvious to someone with experience, but for those … Read more
Microcontroller Serial Port Communication Technology The serial interface and communication of microcontrollers are core technologies for data transmission between devices in embedded systems. 1. Basics of Serial Communication 1.Serial vs Parallel Communication Serial communication: Transmits data bit by bit, using fewer pins (14), suitable for long distances and low power consumption scenarios. Parallel communication: Multiple … Read more
Follow+Star PublicAccount, don’t miss exciting content Reference Source | Renesas Embedded Encyclopedia Modern microcontrollers are increasingly resource-rich, with multiple integrated serial ports, and their key functionalities are becoming more powerful. Some applications may require automatic baud rate detection for serial communication. Today, we will discuss the common principles of automatic baud rate detection at the … Read more
Today, while working on an intelligent voice control module, I wanted to reinforce my knowledge of serial communication. Upon reviewing my previous notes, I found them lacking in detail, so I decided to write a new article explaining the principles of serial communication, covering both hardware and software implementations clearly. This will thoroughly clarify the … Read more
Click the blue text Follow us 1. First of all, UART and TTL are completely different concepts. UART stands for Universal Asynchronous Receiver/Transmitter, which is a serial asynchronous communication protocol. The TTL level signal specifies that +5V is equivalent to logic “1” and 0V is equivalent to logic “0” (when using binary to represent data). … Read more