#include<Servo.h>
Servo servo1;

void setup() {
  // put your setup code here, to run once:
pinMode(A1, INPUT);
servo1.attach(3);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
int gas_level=analogRead(A1);
Serial.println(gas_level);
if(gas_level>500){
servo1.write(90);
}
else{
  servo1.write(0);
}

}
// MQ2 SENSOR - USED TO DETECT CO2 OR O2 GAS LEAKAGE
/*QUESTION : WAP WHEN THE GAS LEAKAGE VALUE IS GREATER THAN 500 PPM THEN
TIME SERVO ROTATE FOR 90 DEGREE ELSE IT'S FIXED AT 0 DEGREE*/