// Arduino Gas Sensor Example using MQ Series
// Connections:
// VCC  → 5V
// GND  → GND
// AOUT → A0

const int gasPin = A0;  // Analog pin connected to AOUT of the gas sensor

void setup() {
  // Initialize Serial communication
  Serial.begin(9600);
}

void loop() {
  // Read analog value from the gas sensor
  int gasValue = analogRead(gasPin);

  // Print the raw sensor value to the Serial Monitor
  Serial.print("Gas Sensor Value: ");
  Serial.println(gasValue);

  // Check for high gas concentration
  if (gasValue > 400) {
    Serial.println("⚠️ Warning: High Gas Concentration Detected!");
  }

  // Wait for 1 second before the next reading
  delay(1000);
}