void setup() {
Serial.begin(115200);
pinMode(2, OUTPUT);
}
void loop()
{
int gasvalue analogRead(4);
Serial.print("Gas Sensor Value: ");
Serial.println(gasvalue);
if (gasvalue<-700)
digitalWrite(2, HIGH);
Serial.print("Danger | Gas leak Detected!");
else{
digitalWrite(2, LOW);
Serial.println("Environment Safe");
delay(2000);
}