How to flash an rp2040 pro micro

We strongly recommend flashing these before soldering.

You will need to have a QMK command line environment installed- see here: https://docs.qmk.fm/newbs_getting_started

You do not need QMK toolbox to flash RP2040 controllers.

Compile your firmware, using the converter feature:

qmk compile -kb crkbd -km via -e CONVERT_TO=rp2040_ce

qmk compile -kb lily58 -km via -e CONVERT_TO=rp2040_ce

Find the uf2 file that produced in your /qmk_firmware folder on your computer.

Plug in the controller holding the BOOT button. A folder called RPI-RP2 should pop up. Some linux distros may need to manually mount the drive.

Drag and drop the uf2 file onto this RPI-RP2 folder. It should automatically disconnect, then connect as a keyboard.

If you have forgotten to flash the controller for the first time before soldering, you can enter bootloader by connecting the BOOT hole on the back to GROUND as indicated here:

After flashing for the first time with QMK you can then enter bootloader with the usual QMK methods (reset switch, bootmagic, QK_BOOT keycode).