说明：  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; despite; no matter; disregard; in despite of still; nevertheless; had better; or; just the same communication; communications; communicate; communicate by letter; correspond rare; exceptional; hard to come by; hard to get)