pico-micropython-examples/uart/terminal/README.md

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. Add enable_uart=1 to the Raspberry Pi computer config.txt and boot it.
2. Connect pins pico:{1,2,3} to pi:{10,8,6}
3. Connect to Pico using Thonny
4. From Thonny, run terminal.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 (like raspi-config) work

For a full-fledged serial interface, look at picoprobe referenced in Appendix A of the Pico Getting Started Guide.