#define Buzzer 4

void setup() {
  pinMode(Buzzer, OUTPUT);
  Serial.begin(115200);
  }

  void loop() {
    digitalWrite(Buzzer, HIGH); // Excite buzzer
      delay(500);
      Serial.println("ON");
        digitalWrite(Buzzer, LOW);  // Turn off buzzer
          delay(500);
          Serial.println("OFF");
          }