syntax = "proto3";

import "nanopb.proto";

package PB;

/*
 * Message FROM the SmartKnob to USB host
 */
message FromSmartKnob {
    oneof payload {
        Ack ack = 1;
        Log log = 2;
        SmartKnobState smartknob_state = 3;
    }
}

message Ack {
    uint32 nonce = 1;
}

message Log {
    string msg = 1 [(nanopb).max_length = 255];
}

message SmartKnobState {
}

/*
 * Message TO the Smartknob from the USB host
 */
message ToSmartknob {
    uint32 nonce = 1;

    oneof payload {
        RequestState request_state = 2;
        SmartKnobConfig smartknob_config = 3;
    }
}

message SmartKnobConfig {
}

message RequestState {}