// Gas Sensor with Buzzer

// Pin connections
const int gasSensorPin = A0;  // Analog pin for gas sensor
const int buzzerPin = 9;     // Digital pin for buzzer

// Threshold value for gas detection
const int gasThreshold = 500;  // Adjust this value according to your sensor's sensitivity

void setup() {
  pinMode(buzzerPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // Read the gas sensor value
  int gasValue = analogRead(gasSensorPin);

  // Print the gas value to the serial monitor
  Serial.print("Gas Value: ");
  Serial.println(gasValue);

  // If the gas value exceeds the threshold, activate the buzzer
  if (gasValue > gasThreshold) {
    digitalWrite(buzzerPin, HIGH);
    delay(1000);  // Buzzer on time
    digitalWrite(buzzerPin, LOW);
    delay(1000);  // Buzzer off time
  } else {
    digitalWrite(buzzerPin, LOW);
  }

  delay(500);  // Delay between readings
}