statserial Sun Feb 5, 2012 by jmccrohan in Linux control lines, CTS, DCD, debug, DSR, DTR, GND, RI, rs-232, RTS, RxD, Serial Port, statserial, ttyS0, TxD I found a handy ncurses based serial port debugger recently called statserial. It outputs the status of the serial control lines to the terminal. Install with: apt-get install statserial Run with: statserial /dev/ttyS0 Read more →