Pico serial terminal

A simple example to allow a Pico to act as a serial terminal into another Raspberry Pi computer.
Useful for setting up a Pi when network setup fails for some reason.
Should work for Windows, Linux, or Mac host machines.

1. Addenable_uart=1 to the Raspberry Pi computerconfig.txt and boot it.
2. Connect pinspico:{1,2,3} topi:{10,8,6}
3. Connect to Pico usingThonny
4. From Thonny, runterminal.py on Pico, then power up the Pi

You should now have a serial terminal to your Raspberry Pi computer through your Pico.

Errata / Bugs

• Input is only taken a whole line at a time after the EOL character.
• Line input is ALWAYS echoed back to the terminal as a new line, even passwords
• Control characters are dropped so no curses tools (likeraspi-config) work