#define POTENTIOMETER_PIN   35 //ESP32 pin GPIO35 (ADC0) connected to Potentiometer pin
#define LED_PIN             26 //ESP32 pin GPTO26 connected to LED's pin
#define BUZZER_PIN          21
#define ANALOG_THRESHOLD    1000

//the setup routine runs once when you press reset:
void setup() {
  //initialize serial communication at 9600 bits per second:
  Serial.begin(9600);

  //declare LED pin to be an output:
  pinMode(LED_PIN, OUTPUT);

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

//the loop routine runs over and over again forever:
void loop() {
  //reads the input on analog pin A0 (value between 0 and 4095)
  int analogValue = analogRead(POTENTIOMETER_PIN);

  //scales it to brightness (value between 0 and 255)
  int brightness = map(analogValue, 0, 4095, 0, 255);

  //sets the brightness to LED that connects to pin 3
  analogWrite(LED_PIN, brightness);

  //print out the value
  Serial.print("Analog value = ");
  Serial.print(analogValue);
  Serial.print(" => brightness = ");
  Serial.print(brightness);
  delay(100);


  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation

  if (analogValue > ANALOG_THRESHOLD)
    digitalWrite(BUZZER_PIN, HIGH); //turn on Piezo buzzer
  else 
    digitalWrite(BUZZER_PIN, LOW); //turn off Piezo Buzzer
}