/*
control buzzer sound
*/

#define POTENTIOMETER_PIN 35 // ESP32 pin GPI035 (ADC0) connected to Potentiometer pin
#define BUZZER_PIN        21 // ESP32 pin GPI021 connected to Buzzer's pin
#define ANALOG_THRESHOLD  1000

void setup() {
  pinMode(BUZZER_PIN, OUTPUT); // set ESP32 pin to output mode
}

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
  else
    digitalWrite(BUZZER_PIN, LOW); //turn off Piezo Buzzer
}