qmk-keychron-q3-colemak-dh/keyboards/handwired/splittest/bluepill/info.json

{
    "matrix_pins": {
        "cols": ["B1"],
        "rows": ["B10"]
    },
    "diode_direction": "COL2ROW",
    "processor": "STM32F103",
    "bootloader": "stm32duino"
}