Hot answers tagged serial-port
If you stick a serial loopback adapter in the specified serial port: Yes. If you want to debug an application talking through a serial port, you could use this command: socat /dev/ttyS0,raw,echo=0 SYSTEM:'tee input.txt | socat - "PTY,link=/tmp/ttyV0,raw,echo=0,waitslave" | tee output.txt' (From http://unix.stackexchange.com/a/225904/127903)
serial ports don't support the telnet TCP protocol, telnet is falling back to linemode,you need to disable telnet linemode so that it will use character mode. type ctrl-]mode characterenter and then log in.
As mentioned before you can try picocom. The latest release (2.0) can also be used (safely) to set-up a "terminal server" since it does no longer permit shell commands injection. See: https://github.com/npat-efault/picocom/releases
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