These instructions describe the process of loading a new firmware (in .uf2
format) onto the Raspberry PI Pico microcontroller (RP2040).
Find the BOOTSEL button on the Pico microcontroller.
NOTE: Do not power the Pico using any external power source (such as a USB powerbank) during this procedure.
Depress the BOOTSEL button while plugging the microcontroller into a computer using the micro-USB port on the short end of the Pico.
This makes the Pico show up as a drive in the operating system. Drag and
drop the .uf2 firmware file onto the drive.
Unplug the microcontroller.
The firmware is now updated and the device may be started as normal.