监视Modbus规约的通讯程序，可以监视上下行报文

实现串行通信 个人财务管理系统 个人财务管理系统 -personal financial management systems for personal financial management systems for personal financial management system

common communication

串口编程（中文翻译版）----绝对经典书籍

Serial port programming for Windows and Linux

从事Profibus的开发人员可以利用改源代码理解profibus协议。添加除通讯以外的代码，很快可以开发出自己的智能节点-engaged in the development staff can use the source code to understand change Profibus agreement. Add except communications code, we will soon be able to develop their own intelligent nodes

Serial Port Component

RS232串口,详细编程源代码,包括串口的设置,读写.-RS232 serial ports, a detailed programming source code, including the serial port settings, reading and writing.

MSComm32.ocx串口通信程序。测试时不要用虚拟串口，直接将串口2引脚与3引脚短接。-MSComm32.ocx serial communication program. Not to test with virtual serial port, serial port directly to 2-pin and 3 pin shorted.

Visual Basic中实现串口通讯，该代码是自动读取简单程序。-Visual Basic Serial communication, the code is automatically read simple procedures.

用VC控件MSComm编写串口通信程序的源代码，并写出详细的编程过程,仅供参考-MSComm control VC prepared serial communication program"s source code, and write a detailed programming process for reference! !