//int playing = 0;
//void tone(byte pin, double freq) {
  //ledcSetup(0, freq, 8); // setup beeper
  //ledcAttachPin(pin, 0); // attach beeper
  //ledcWriteTone(0, freq); // play tone
  //playing = pin; // store pin
//}

int pin = 25;
int freq = 1047;
int channel = 1;

void setup() {

Serial.begin(115200);
//pinMode(pin, OUTPUT);
ledcSetup(channel, freq, 8); // setup beeper
ledcAttachPin(pin, channel); // attach beeper
//ledcWriteTone(channel,freq);
ledcWrite(channel, 128); // play tone
Serial.println("played tone");
}

void loop() {

// no need to repeat the melody.
}