Flashing the firmware of the Mysterium DIY keyboard

October 21, 2024 Reading time: 2 minutes

42Keebs provides firmware images for their DIY keyboard kits on their website.

The firmware of the Mysterium firmware can be flashed using avrdude:

1. Install avrdude:

   sudo apt install avrdude

2. Download hex file to install from https://42keebs.eu/firmware/
3. Connect the keyboard to the computer, hold boot button and press reset to enter boot mode.
4. Flash firmware with:

   sudo avrdude -p atmega32a -c usbasp -U flash:w:/path/to/42keebs_mysterium_v15d_vial.hex:i