hardware part

• https://github.com/sb-child/keyboard-hardware

• install vscode, then install platformio plugin

• clone this repo, open in vscode, then click PlatformIO: Build button at the bottom

this firmware need to upload to MCU on the 2nd and the 6th board.

you need to prepare a WCH-LinkE-R0-1v3 debugger, and solder three wires VCC, GND, SWDIO from the board which need to upload, and connect the wires to the debugger

click PlatformIO: Upload button at the bottom

disconnect these wires