Tanishq

 // Pin Definitions

const int gasSensorPin = A0; // MQ-2 sensor analog output

const int buzzerPin = 8; // Buzzer pin

const int ledPin = 9; // LED pin

const int batteryPin = A1; // Battery voltage monitoring pin

// Threshold Values

const int gasThreshold = 400; // Adjust based on your sensor's calibration

const float batteryLowVoltage = 3.5; // Low battery voltage threshold (in volts)

void setup() {

  pinMode(buzzerPin, OUTPUT);

  pinMode(ledPin, OUTPUT);

  Serial.begin(9600); // For debugging and monitoring

}

void loop() {

  // Read gas sensor value

  int gasValue = analogRead(gasSensorPin);

  // Gas detection logic

  if (gasValue > gasThreshold) {

    digitalWrite(ledPin, HIGH); // Turn on LED

    digitalWrite(buzzerPin, HIGH); // Turn on buzzer

    Serial.println("Gas Detected!");

  } else {

    digitalWrite(ledPin, LOW); // Turn off LED

    digitalWrite(buzzerPin, LOW); // Turn off buzzer

  }

  // Battery voltage monitoring

  int batteryValue = analogRead(batteryPin);

  float batteryVoltage = (batteryValue * 5.0) / 1023.0 * 2; // Adjust if using a voltage divider

  Serial.print("Battery Voltage: ");

  Serial.println(batteryVoltage);

  if (batteryVoltage < batteryLowVoltage) {

    Serial.println("Warning: Battery Voltage Low!");

  }

  delay(500); // Delay for stability

}