qmk_firmware/keyboards/handwired/onekey/nucleo_f446re/info.json

{
    "keyboard_name": "Onekey Nucleo F446RE",
    "processor": "STM32F446",
    "bootloader": "stm32-dfu",
    "matrix_pins": {
        "cols": ["A2"],
        "rows": ["A1"]
    },
    "backlight": {
        "pin": "B8"
    },
    "rgblight": {
        "pin": "A0"
    }
}