A small 4‑key macropad based on the Seeed XIAO RP2040, customized to act as WASD keys for gaming and shortcuts.
The board uses MX‑style switches, SK6812‑MINI addressable RGB LEDs, and a 3D‑printed case inspired by the Hack Club Hackpad project..

• 4 mechanical MX‑style switches laid out as WASD
• Seeed XIAO RP2040 as the main controller
• KMK firmware running on CircuitPython
• 4 SK6812‑MINI RGB LEDs for per‑key lighting
• Custom PCB designed in KiCad
• 3D‑printed top and bottom case

• 1 × Seeed XIAO RP2040 module
• 4 × MX‑style mechanical switches
• 4 × SK6812‑MINI addressable RGB LEDs
• Custom PCB (KiCad files in Hardware/)
• 3D‑printed case (Fusion 360 / STEP files in Case/)

See BOM.csv for the full bill of materials.

The firmware is written with KMK:

• Source in the Firmware/ folder (main file: firmware.main.py)
• Keys are wired to XIAO pins D0–D3 and mapped to W, A, S, D
• Plug the board in, copy firmware.main.py to the CIRCUITPY drive, and it will enumerate as a USB keyboard

1. Assemble the PCB
   • Solder the XIAO RP2040, switches, LEDs, and passives.
2. Flash CircuitPython & KMK KMK
   • Install CircuitPython on the XIAO and copy the KMK library folder.
3. Copy firmware
   • Copy Firmware/firmware.main.py to the CIRCUITPY drive.
4. Print and assemble case
   • 3D print the case parts and assemble with M3 screws and heat‑set inserts.