zmk/app/dts/behaviors/bluetooth.dtsi

/*
 * Copyright (c) 2020 The ZMK Contributors
 *
 * SPDX-License-Identifier: MIT
 */

/ {
    behaviors {
        /omit-if-no-ref/ bt: behavior_bluetooth {
            compatible = "zmk,behavior-bluetooth";
            label = "BLUETOOTH";
            #binding-cells = <2>;
        };
    };
};