Question

I am using the busybox microcom program to communicate between 2 jsLinux instances via websocket. Everything is going fine, and using microcom I am able to chat between the images.

However, I would like to also have what I typed echoed back to me, instead of only what the other person types shown. I tried something like tail -f | microcom /dev/ttyS1
however this did not work.

The command I am using to connect the 2 instances (via emulated serial port) is:
microcom /dev/ttyS1

Here is the busybox microcom documentation:

microcom [-d DELAY] [-t TIMEOUT] [-s SPEED] [-X] TTY

Copy bytes for stdin to TTY and from TTY to stdout

Options:

    -d      Wait up to DELAY ms for TTY output before sending every
            next byte to it
    -t      Exit if both stdin and TTY are silent for TIMEOUT ms
    -s      Set serial line to SPEED
    -X      Disable special meaning of NUL and Ctrl-X from stdin

Thanks.

Answer 1

try this:

tee /dev/stderr | microcom /dev/ttyS1

that would print everything to /dev/stderr (usually a symlink to /proc/self/fd/2) and pipe it into the standard input of microcom (or use a file instead of stderr…)