qmk-firmware/keyboards/dumbpad/v0x/info.json

{
    "usb": {
        "device_version": "0.0.7"
    },
    "matrix_pins": {
        "cols": ["C6", "D7", "E6", "B4", "B5"],
        "rows": ["F4", "F5", "F6", "F7"]
    },
    "diode_direction": "COL2ROW",
    "encoder": {
        "rotary": [
            {"pin_a": "D0", "pin_b": "D4"}
        ]
    },
    "bootmagic": {
        "matrix": [3, 0]
    },
    "processor": "atmega32u4",
    "bootloader": "caterina",
    "layouts": {
        "LAYOUT": {
            "layout": [
                {"matrix": [0, 1], "x": 1, "y": 0},
                {"matrix": [0, 2], "x": 2, "y": 0},
                {"matrix": [0, 3], "x": 3, "y": 0},
                {"matrix": [0, 4], "x": 4, "y": 0},

                {"matrix": [1, 1], "x": 1, "y": 1},
                {"matrix": [1, 2], "x": 2, "y": 1},
                {"matrix": [1, 3], "x": 3, "y": 1},
                {"matrix": [1, 4], "x": 4, "y": 1},

                {"matrix": [2, 1], "x": 1, "y": 2},
                {"matrix": [2, 2], "x": 2, "y": 2},
                {"matrix": [2, 3], "x": 3, "y": 2},
                {"matrix": [2, 4], "x": 4, "y": 2},

                {"matrix": [3, 0], "x": 0, "y": 3},
                {"matrix": [3, 1], "x": 1, "y": 3},
                {"matrix": [3, 2], "x": 2, "y": 3},
                {"matrix": [3, 3], "x": 3, "y": 3},
                {"matrix": [3, 4], "x": 4, "y": 3}
            ]
        }
    }
}