1. Download QMK Tool Box

2. Download Keyboard Firmware

Download the appropriate firmware for your keyboard.

3. Open QMK Tool Box

Launch the QMK Tool Box application.

4. Select Firmware

Click “Open” and browse to find the firmware file on your computer.

5. Prepare Keyboard

Remove the spacebar keycap and press the reset button to the left of the spacebar switch.

6. Detect Keyboard

QMK Tool Box will detect the keyboard. You will see:

“Atmel DFU device connected: ATMEL ATm32U4DFU.”

7. Clear EEPROM

Click “Clear EEPROM” to remove previous firmware. You will see:

“Please reflash device with firmware now. EEPROM clear complete.”

8. Flash Firmware

Click “FLASH” to start flashing the new firmware.

9. Success Confirmation

Once flashing is complete, you will see:

“Flash complete. Atmel DFU device disconnected: ATMEL ATm32U4DFU.”