qmk_firmware/keyboards/binepad/bnr1/v2/keyboard.json

{
    "bootloader": "stm32duino",
    "processor": "STM32F103",
    "diode_direction": "COL2ROW",
    "usb": {
        "pid": "0x4241",
        "device_version": "2.0.0"
    },
    "matrix_pins": {
        "cols": ["A15"],
        "rows": ["A8"]
    },
    "encoder": {
        "enabled": true,
        "rotary": [
            {"pin_a": "B3", "pin_b": "B4"}
        ]
    }
}