#define MQ2_PIN A0       // Analog pin for MQ-2 sensor
#define FLAME_PIN 2      // Digital pin for Flame sensor
#define BUZZER_PIN 3     // Digital pin for Buzzer
#define LED_PIN 4        // Digital pin for LED

void setup() {
  pinMode(MQ2_PIN, INPUT);
  pinMode(FLAME_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int smokeValue = analogRead(MQ2_PIN);
  int flameValue = digitalRead(FLAME_PIN);

  Serial.print("Smoke Value: ");
  Serial.print(smokeValue);
  Serial.print(" | Flame Value: ");
  Serial.println(flameValue);

  if (smokeValue > 300 || flameValue == LOW) {
    digitalWrite(BUZZER_PIN, HIGH); // Turn on Buzzer
    digitalWrite(LED_PIN, HIGH);    // Turn on LED
  } else {
    digitalWrite(BUZZER_PIN, LOW);  // Turn off Buzzer
    digitalWrite(LED_PIN, LOW);     // Turn off LED
  }

  delay(500);
}