This directory contains some contributions.
tio is a nice serial console client that has all the nice magic switches and cmdline friendlieness that you expect on Linux-like systems.
Apply the patch to tio @commit bfefd04b5567ba2b5
in order to allow serial console session w/o tapering of the I/O stream so you
can pipe arbitrary data through your pty for the bounce command (this patch
works like ssh's -e none).
Adding this patch to current versions is not necessary anymore as its already been integrated.
Then add to your ~/.tioconfig:
prefix-ctrl-key = none
Which disables prefix parsing.
tio will collect input bytes into a buffer before sending it to the serial line,
which could lead to peeks above the acceptable baudrate. This dirty patch adds rate
limiting in the write cycle. Also consider using tio -o 1 if you get bit flips
during transmission.