const int relay = 18; // Relay control pin on ESP32

void setup() {
  Serial.begin(115200); // Start serial communication
  pinMode(relay, OUTPUT); // Set relay pin as output
}

void loop() {
  // Turn on the relay (LED turns ON if using Normally Open configuration)
  digitalWrite(relay, LOW); 
  Serial.println("Buzz on");
  delay(5000); // Keep the LED ON for 5 seconds
  
  // Turn off the relay (LED turns OFF if using Normally Open configuration)
  digitalWrite(relay, HIGH);
  Serial.println("Buz off");
  delay(5000); // Keep the LED OFF for 5 seconds
}