// Change this depending on where you put your piezo buzzer
const int TONE_OUTPUT_PIN = 13;

// The ESP32 has 16 channels which can generate 16 independent waveforms
// We'll just choose PWM channel 0 here
const int TONE_PWM_CHANNEL = 0; 

void setup() {
  ledcAttachPin(TONE_OUTPUT_PIN, TONE_PWM_CHANNEL);
}

void loop() {
  // Plays the middle C scale
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_C, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_D, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_E, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_F, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_G, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_A, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_B, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_C, 5);
  delay(500);
  noTone(TONE_PWM_CHANNEL);
  delay(1000);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_C, 5);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_B, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_A, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_G, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_F, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_E, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_D, 4);
  delay(500);
  ledcWriteNote(TONE_PWM_CHANNEL, NOTE_C, 4);
  delay(500);
  noTone(TONE_PWM_CHANNEL);
  delay(1000);
}