// MQ5 Gas Sensor
void setup() 
{
  pinMode(A0, INPUT);
  Serial.begin(9600);
  Serial.println("Group 1 - MQ5 Sensor");
}

void loop() 
{
  int G = analogRead(A0);
  Serial.print("The Gas value is: ");
  Serial.println(G);
  delay(2000);
}