qmk_firmware/keyboards/chavdai40/rev1/info.json

{
    "keyboard_name": "Chavdai40",
    "usb": {
        "device_version": "0.0.1"
    },
    "matrix_pins": {
        "cols": ["B8", "B4", "B3", "B2", "B1", "B0", "A7", "A6", "A5", "A4", "A3", "A2", "A1"],
        "rows": ["A0", "A15", "B5", "B6"]
    },
    "diode_direction": "COL2ROW",
    "processor": "STM32F042",
    "bootloader": "stm32-dfu"
}