Provides access to a com-port device via REST and WebSockets.

To quickly test this on Linux:

• create a virtual com-port attached over USB, socat will run as a background job:

nohup sudo socat -d -d pty,raw,echo=0,link=/dev/ttyUSB100 pty,raw,echo=0,link=./local_com &
awk '/PTY is/ {a_prev=a; a=$NF} END{cmd="for i in " a_prev " " a "; do sudo chmod +777 $i; done"; system(cmd)}' nohup.out

• connect to it. Use C-a C-c to turn local echo on, C-a C-q to exit:

picocom ./local_com

• prepare virtualenv and activate it:

python3.8 -m virtualenv venv
. venv/bin/activate
pip install -r requirements.txt

• run the server like this:

venv/bin/hypercorn serious_quartz:app --error-log - --access-log -

• connect with a WebSocket client:

wscat -c localhost:8000/api

• type and send something in picocom:

• shut socat down:

a=$(jobs | awk -F'[][]' '/local_com/ {system("echo fg %"$2)}')
$a