unsigned long countdownStartMillis = 0;
const long intervalCountdown = 1000;
int count = 0;
int relayPin = 12;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, HIGH);
}


void publishCountdown() {
  unsigned long currentMillis = millis();
  if (currentMillis - countdownStartMillis >= intervalCountdown) {
    count++;
    Serial.println(count);
    countdownStartMillis = currentMillis;
    tone(relayPin, 1000, 500);

  }
}
void loop() {
  publishCountdown();
}