send and get multiple data with serial wemos and uno

//send
byte data[2];
data[0] = volume_json;
data[1] = relay_json;
Serial.write(data, 2 );

//read
byte incomingBytes[2];
  if (Serial.available()) {      // If anything comes in Serial (USB),
    for (int i = 0; i < 3; i++) {
      incomingBytes[i] = Serial.read();
    }
    Serial.println(incomingBytes[0]);
    Serial.println(incomingBytes[1]);
  }