本教程结合实际开发内容进行实例讲解Linux下串口与工业协议开发，主要内容有串口通信原理、串口编程常用的API、串口编程实践、Modbus协议介绍和Modbus编程实践等内容。-Combined with the actual development of the tutorial examples to explain the contents of the serial port and the industrial agreement under Linux development, the main contents of serial communication theory, commonly used in serial programming API, serial programming practice, Modbus and Modbus protocol describes programming practice and so on.