qmk-firmware/keyboards/machkeyboards/mach3/info.json

{
    "keyboard_name": "Mach 3",
    "manufacturer": "MachKeyboard",
    "url": "https://machkeyboards.com",
    "maintainer": "etiennelepagel",
    "usb": {
        "vid": "0x4D41",
        "pid": "0x4D33",
        "device_version": "0.0.1"
    },
    "backlight": {
        "pin": "B6",
        "levels": 5,
        "breathing": true
    },
    "processor": "atmega32u4",
    "bootloader": "caterina",
    "layouts": {
        "LAYOUT_3x3": {
            "layout": [
                {
                    "x": 0,
                    "y": 0
                },
                {
                    "x": 1,
                    "y": 0
                },
                {
                    "x": 2,
                    "y": 0
                },
                {
                    "x": 0,
                    "y": 1
                },
                {
                    "x": 1,
                    "y": 1
                },
                {
                    "x": 2,
                    "y": 1
                },
                {
                    "x": 0,
                    "y": 2
                },
                {
                    "x": 1,
                    "y": 2
                },
                {
                    "x": 2,
                    "y": 2
                }
            ]
        }
    }
}