// Define the pin for the MQ-2 sensor
const int mq2Pin = A0;  // Analog pin connected to MQ-2

// Define variables to store sensor readings
int mq2Value = 0;

void setup() {
  // Start the serial communication
  Serial.begin(115200);
  delay(1000);  // Wait for serial to initialize
  
  // Set the MQ-2 sensor pin as an input (default for analog pins)
  pinMode(mq2Pin, INPUT);
}

void loop() {
  // Read the analog value from the MQ-2 sensor
  mq2Value = analogRead(mq2Pin);
  
  // Print the sensor value to the Serial Monitor
  Serial.print("MQ-2 Sensor Value: ");
  Serial.println(mq2Value);

  // Delay for a bit before taking the next reading
  delay(1000);  // Delay 1 second
}