qmk_firmware/keyboards/keebio/iris/rev6b/info.json

{
    "keyboard_name": "Iris Rev. 6b",
    "usb": {
        "pid": "0x6456",
        "device_version": "6.2.0"
    },
    "encoder": {
        "rotary": [
            {"pin_a": "B3", "pin_b": "B2"}
        ]
    },
    "split": {
        "soft_serial_pin": "D0"
    },
    "processor": "atmega32u4",
    "bootloader": "atmel-dfu"
}