基于STM32和Modbus的串口服务器系统

摘要

为满足工业控制中不同功能模块的信息交换、无法联网和远程控制不方便等问题,设计了一种基于STM32微控制器的串口数据采集、处理和传输的串口服务器系统.系统以STM32F103RBT6为核心处理芯片,通过USR-WIFI232-D2双网模组进行WIFI无线传输,并使用RS232和RS485芯片发送和接收低速串口数据.系统采用构造简单、功能强大的Modbus协议作为上层通讯协议,保证了系统运行的稳定可靠.实验表明了串口系统的实时性和可靠性良好,为在通信工程的信号采集与传输提供了一种有效的组网技术方案.%To solve the problems of information exchange, networking and remote control of different function modules in industrial control,a serial device server for the serial data acquisition, processing and transmission based on STM32 microprocessor was designed. System with STM32F103RBT6 as the core processing chip, WIFI wireless transmission through the dual module of USR-WIFI232-D2, and uses the RS232 and RS485 chip sends and receives a low-speed serial data. The system adopts Modbus protocol with simple structure and powerful function as the upper layer communication protocol, which ensures the stability and reliability of the system. The result shows that the real-time performance and reliability of the serial device server provides an effective networking technology for the real-time collection and transmission of the communication engineering.