#define GAS_SENSOR_PIN 34  // MQ2 analog pin (use ADC-capable pin on ESP32)
#define LED_PIN 2          // Built-in LED on ESP32 (GPIO 2)

void setup() {
  Serial.begin(115200);
  pinMode(GAS_SENSOR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  Serial.println("MQ2 Gas Sensor Initialized");
}

void loop() {
  int gasValue = analogRead(GAS_SENSOR_PIN);
  Serial.print("Gas Value: ");
  Serial.println(gasValue);

  if (gasValue > 3630) {
    digitalWrite(LED_PIN, HIGH); // Turn on LED if gas level > 200
  } else {
    digitalWrite(LED_PIN, LOW);  // Turn off LED otherwise
  }

  delay(1000); // Read every second
}