这只是个小工具，可以根据需要进行DTU的模拟，方便实用。 该工具由VB.NET(2008)编写，里面包含了SOCKET通讯的代码、串口操作的代码，应该对你有所帮助-This is just a small tool that can simulate DTU as needed, convenient and practical. The tool consists of VB.NET (2008) write, which contains SOCKET communication code,