qmk_firmware/keyboards/splitkb/kyria/rev1/proton_c/keyboard.json

{
    "development_board": "proton_c",
    "matrix_pins": {
        "cols": ["B9", "B15", "B14", "B13", "B8", "A0", "A1", "A2"],
        "rows": ["B1", "B2", "B3", "B5"]
    },
    "diode_direction": "COL2ROW",
    "encoder": {
        "rotary": [
            {"pin_a": "B4", "pin_b": "B0"}
        ]
    },
    "split": {
        "encoder": {
            "right": {
                "rotary": [
                    {"pin_a": "B0", "pin_b": "B4"}
                ]
            }
        },
        "serial": {
            "driver": "usart"
        }
    },
    "ws2812": {
        "driver": "pwm",
        "pin": "A3"
    }
}