上传一个VB串口通讯源代码_数据请求端，此代码需要进一下考虑，希望大家测试、共享、参考。-Upload a VB serial communication source code _ data requests end, this code need into consideration, testing, sharing, reference.

端口扫描，写入文件，自己做了测试的版本，给大家分享-Port scanning, write documents, make their own version of the test, to share