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"
    },
    "matrix_pins": {
        "cols": ["E6", "B4", "B5"],
        "rows": ["D1", "D0", "D4"]
    },
    "diode_direction": "COL2ROW",
    "backlight": {
        "pin": "B6",
        "levels": 5,
        "breathing": true
    },
    "processor": "atmega32u4",
    "bootloader": "caterina",
    "layouts": {
        "LAYOUT_3x3": {
            "layout": [
                {"matrix": [0, 0], "x": 0, "y": 0},
                {"matrix": [0, 1], "x": 1, "y": 0},
                {"matrix": [0, 2], "x": 2, "y": 0},

                {"matrix": [1, 0], "x": 0, "y": 1},
                {"matrix": [1, 1], "x": 1, "y": 1},
                {"matrix": [1, 2], "x": 2, "y": 1},

                {"matrix": [2, 0], "x": 0, "y": 2},
                {"matrix": [2, 1], "x": 1, "y": 2},
                {"matrix": [2, 2], "x": 2, "y": 2}
            ]
        }
    }
}