一个自己编写的OPC异步读写类，其中包含使用说明，欢迎大家下载测试。本人使用在一个污水处理的项目中，没有出现什么问题。-An asynchronous read and write their own written OPC class, which contains instructions for use, are welcome to download the test. I used in a sewage treatment project, there was no problem.

污水处理控制，C++开发，内含串口通信，数据记录并打印多个C++程序，能加大爱好者对PC与单片机、PLC通信的学习。-Sewage treatment control, C++ development, includes serial communications, data recording and print multiple C++ program, can increase the PC and microcontroller enthusiasts, PLC communicatio