qmk_firmware/keyboards/25keys/aleth42/rev1/info.json

{
    "usb": {
        "device_version": "0.0.1"
    },
    "encoder": {
        "rotary": [
            {"pin_a": "B5", "pin_b": "B6"},
            {"pin_a": "F5", "pin_b": "F6"}
        ]
    },
    "backlight": {
        "pin": "C6",
        "levels": 8,
        "breathing": true
    },
    "processor": "atmega32u4",
    "bootloader": "atmel-dfu"
}