#include <Servo.h>

Servo myServo;  // Create a servo object
const int gasSensorPin = A0;  // Gas sensor connected to analog pin A0
const int buzzerPin = 8;      // Buzzer connected to digital pin 8
const int gasThreshold = 400; // Gas threshold value (adjust as needed)
const int servoAngle = 180;   // Servo angle when gas level exceeds threshold

void setup() {
  Serial.begin(9600);         // Initialize serial communication
  myServo.attach(9);          // Attach servo to pin 9
  pinMode(buzzerPin, OUTPUT); // Set buzzer pin as output
  myServo.write(0);           // Initialize servo to 0 degrees
}

void loop() {
  int gasValue = analogRead(gasSensorPin); // Read gas sensor value
  Serial.println(gasValue);                // Print gas value to serial monitor

  if (gasValue > gasThreshold) {
    myServo.write(servoAngle); // Move servo to 180 degrees
    digitalWrite(buzzerPin, HIGH); // Turn on buzzer
    Serial.println("Gas leak detected! Servo activated.");
  } else {
    myServo.write(0); // Return servo to 0 degrees
    digitalWrite(buzzerPin, LOW); // Turn off buzzer
  }

  delay(500); // Delay for stability
}