#define gas_pin A0
void setup() {
  Serial.begin(115200);
  pinMode(gas_pin, OUTPUT);
}

void loop() {
int sensorValue=analogRead(gas_pin);
  Serial.print("GAS LEVEL:");
  Serial.print(sensorValue);
  Serial.print("ppm");
 Serial.println(); 
  delay(5000);
  
}