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)