转载连接:css
USB转TTL、USB转串口、USB转232的区别:
https://blog.csdn.net/csshuke/article/details/78854563web
RS-232 和 UART 之间有什么区别?
https://www.zhihu.com/question/22632011ssh
uart、串口、COM口、USB口,ttl,rs232, rs485这几个究竟是啥关系?、
https://www.zhihu.com/question/271616218svg