How to get into a MicroPython REPL using USB in 10 seconds

On Linux, use picocom:

picocom /dev/ttyUSB0 -b115200

and press enter to get a REPL (or press the RESET button on the board if that does not work).

You should now see the

>>>

prompt.

Don’t have picocom installed?

sudo apt -y install picocom

Got permission denied errors?

sudo usermod -a -G dialout $USER

then logout and log back in or reboot!