Hi,st42 wrote: ↑Thu Mar 04, 2021 4:10 amThe instructions for building micropython from source is in https://datasheets.raspberrypi.org/pico ... on-sdk.pdf
"make BOARD=<BOARD_ID> submodules" required just before the final "make"
like
....
$ make BOARD=PICO submodules
$ make
Note: for PICO_W look Appendix A at page 27 https://datasheets.raspberrypi.com/pico ... pico-w.pdf