/*
 * This ESP32 code is created by esp32io.com
 *
 * This ESP32 code is released in the public domain
 *
 * For more detail (instruction and wiring diagram), visit https://esp32io.com/tutorials/esp32-potentiometer-triggers-piezo-buzzer
 */

#define POTENTIOMETER_PIN  36 // ESP32 pin GPIO36 (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
}

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
}