#define BUZZER_PIN D7     // Buzzer pin
#define BUTTON_PIN D3     // Button pin
#define LED_PIN D4        // LED pin

void setup() {
  Serial.begin(115200);                    // Initialize Serial communication
  pinMode(BUZZER_PIN, OUTPUT);             // Set buzzer pin as output
  pinMode(BUTTON_PIN, INPUT_PULLUP);       // Set button pin as input with pull-up resistor
  pinMode(LED_PIN, OUTPUT);                 // Set LED pin as output
  digitalWrite(BUZZER_PIN, LOW);           // Ensure buzzer is off initially
  digitalWrite(LED_PIN, LOW);               // Ensure LED is off initially
}

void loop() {
  int buttonState = digitalRead(BUTTON_PIN); // Read button state

  // Check if button is pressed (LOW state)
  if (buttonState == LOW) {
    digitalWrite(LED_PIN, HIGH);              // Turn on LED
    Serial.println("Buzzer Ringing!");        // Print message to Serial Monitor

    // Accuracy: Play tone at 262 Hz with maximum volume
    tone(BUZZER_PIN, 262, 500);  // Play 262 Hz tone for 500 milliseconds
    delay(500);                   // Wait for the tone duration
    noTone(BUZZER_PIN);          // Stop the tone

    // Note: Volume is set to maximum (1.0) as `tone()` does not support volume control directly
  } else {
    digitalWrite(LED_PIN, LOW);   // Turn off LED
  }
}