这是西门子PLC通讯程序，无线传输，非常有用的例子，赶快下载-Siemens PLC communication program, wireless transmission, very useful example, to download

windowxp MFC modbus通讯编程 上位机-windowxp MFC modbus communication programming PC

Modbus的通讯协议实现，实现简单，代码简洁，Modbus学习者的好材料-The realization of Modbus communication protocol, the realization of a simple, concise code, a good material for Modbus learners