Install microPython
===================
1. https://micropython.org/
   Download | rp2040 | Pico | RPI_PICO-20241129-v1.24.1.uf2
2. Hold Boot button - power-on - release Boot button
3. mount RPI-RP2
4. copy RPI_PICO-20241129-v1.24.1.uf2 to RPI-RP2
5. $ picocom /dev/ttyACM0  -->  >>>
   ...
   >>>  Ctrl-A X

