qmk_firmware/keyboards/handwired/uthol/rev3/info.json

{
    "keyboard_name": "UtholThree",
    "usb": {
        "device_version": "0.0.3"
    },
    "encoder": {
        "rotary": [
            {"pin_a": "C15", "pin_b": "C14", "resolution": 2}
        ]
    },
    "processor": "STM32F401",
    "bootloader": "stm32-dfu",
    "board": "BLACKPILL_STM32_F401"
}