有空再整理。 待参考：RS-232Flow Control 这个解释的不错：What is the difference between DTR/DSR and RTS/CTS flow control? Difference between RS232 Hardware Flow Control RTS/CTS and DTR/DSR 这个也值得看看：DCD DSR DTR RTS CTS表示什么意思 COM RTS/CTS, DTR/DSR转载请注明：在路上 » 【整理】RTS/CTS，DTR/DSR的区别