qmk_firmware/keyboards/jian/rev2/info.json

{
    "keyboard_name": "Jian",
    "usb": {
        "device_version": "2.0.0"
    },
    "backlight": {
        "pin": "C6",
        "levels": 5
    },
    "qmk_lufa_bootloader": {
        "esc_input": "B1",
        "esc_output": "D3"
    },
    "split": {
        "soft_serial_pin": "D1"
    },
    "processor": "atmega32u4",
    "bootloader": "qmk-dfu"
}