qmk-firmware/keyboards/handwired/numpad20/info.json

{
  "keyboard_name": "Numpad 20",
  "manufacturer": "Hexwire",
  "url": "",
  "maintainer": "qmk",
  "usb": {
    "vid": "0xBB80",
    "pid": "0x0504",
    "device_version": "0.0.1"
  },
  "matrix_pins": {
    "cols": ["D1", "D0", "F5", "F4"],
    "rows": ["F6", "B1", "B3", "B6", "B5"]
  },
  "diode_direction": "COL2ROW",
  "processor": "atmega32u4",
  "bootloader": "halfkay",
  "layouts": {
    "LAYOUT": {
      "layout": [
        {"matrix": [0, 0], "x": 0, "y": 0},
        {"matrix": [0, 1], "x": 1, "y": 0},
        {"matrix": [0, 2], "x": 2, "y": 0},
        {"matrix": [0, 3], "x": 3, "y": 0},

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

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