Raspberry Pi Pico: enter bootloader mode without unplug or pull down the RUN/Reset pin

To make your Raspberry Pi enter bootloader mode, it's normally suggested hold down the BOOTSEL button while plugging the board into USB. Alternatively, you can hold down the BOOTSEL button and pull down the RUN/Reset pin.

It's third software approach to enter bootloader mode: run machine.bootloader() at the MicroPython REPL.

It's assumed you have already installed MicroPython firmware on your Raspberry Pi Pico.

Run in MicroPython:

>>> import machine

>>> machine.bootloader()

Your RPi Pico will appear as a USB disk drive you can drag the firmware onto. 

MicroPython updated.