MODEM 调制解调器开发的C语言源程序 BC或MSC编译 适用于嵌入式系统-C source codes for modem developing.You can compile it in Borland c compiler or Microsoft C. It is fit for embedded system as well.

MODBUS_TCP规范,不过这是英文版，英语水平不高的同志可以装个金山词霸！-MODBUS_TCP norms, but this is the English version, English level is not high comrades can fit 000 free email!

适合初学者的UDP通信程序,很简单， 很简单， 很简单， 很简单， 很简单， -An UDP based communication program fit for newbie，quite easy,quite easy,quite easy,quite easy,quite easy,quite easy,quite easy,

自己编写一个串口收发软件还带CRC功能很适合初学都学习！不管是学VB.NET 还是学COM通信都是一个不可多得的软件(write; compile; compose gorge line; serial port receive; receive and dispatch; dispatcher; transmit-receive; send-receive software fit; suit; rightness; idoneity begin to learn however;