#define ledPin 7
#define buzzer 6

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
  Serial.println("Terminal active");
}

void loop() {
  // put your main code here, to run repeatedly:
  static unsigned long lastBlink = millis();
  static int ledState = 0;
  static int serialIn[2] = {};
  static int serialInI = 0;

  if (Serial.available()) {
    while (serialInI <= 2) {
      serialIn[serialInI] = Serial.parseInt();
      serialInI++;
    }
    serialInI = 0;
  }

  switch (serialIn[0]) {
    case 1:
      noTone(buzzer);
      if (millis() - lastBlink > serialIn[1]) {
        ledState = !ledState;
        lastBlink = millis();
      }
      break;
    case 2:
      ledState = 0;
      //digitalWrite(buzzer, HIGH);
      tone(buzzer, serialIn[1]);
      break;
    default:
      ledState = 0;
      //digitalWrite(buzzer, LOW);
      noTone(buzzer);
      break;
  }

  digitalWrite(ledPin, ledState);
}