UF2 file
https://www.raspberrypi.com/documentation/microcontrollers/micropython.html
MicroPico
https://github.com/paulober/MicroPico
リポジトリ(flutter)
https://github.com/junjun-1345/pico-control
リポジトリ(pico)
https://github.com/junjun-1345/pico-control-firmware
flutter_blue_plus(参考リポジトリ)
https://github.com/chipweinberger/flutter_blue_plus/blob/master/packages/flutter_blue_plus/example/lib/main.dart