https://docs.micropython.org/en/latest/esp8266/tutorial/filesystem.html https://docs.micropython.org/en/latest/esp32/tutorial/intro.html Press and hold boot button to upload FW https://micropython.org/download/esp32/
https://github.com/micropython/webrepl
https://www.techcoil.com/blog/how-to-setup-micropython-webrepl-on-your-esp32-development-board/