// Control buzzer sound

#define POTENTIOMETER_PIN  35 // ESP32 pin GPIO35 (ADC0) connected to Potentiometer pin
#define BUZZER_PIN         21 // ESP32 pin GPIO21 connected to Buzzer's pin
#define ANALOG_THRESHOLD   1000

void setup() {
  pinMode(BUZZER_PIN, OUTPUT); // set ESP32 pin to output mode
  Serial.begin(9600); // initialize serial communication
}

void loop() {
  int analogValue = analogRead(POTENTIOMETER_PIN); // read the input on analog pin

  if (analogValue > ANALOG_THRESHOLD) {
    digitalWrite(BUZZER_PIN, HIGH); // turn on Piezo Buzzer
    Serial.println("Buzzer is ON"); // print message to serial monitor
  } else {
    digitalWrite(BUZZER_PIN, LOW);  // turn off Piezo Buzzer
    Serial.println("Buzzer is OFF"); // print message to serial monitor
  }

  delay(100); // delay for stability
}