// Define pin connections
const int tempSensorPin = A0;
const int gasSensorPin = A1;
const int buzzerPin = 7;
const int ledPin = 13;

// Define threshold values
const int tempThreshold = 50; // Example threshold for temperature in Celsius
const int gasThreshold = 300; // Example threshold for gas sensor analog value

void setup() {
  // Initialize serial communication at 9600 baud rate
  Serial.begin(9600);

  // Configure pins
  pinMode(tempSensorPin, INPUT);
  pinMode(gasSensorPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Read sensor values
  int tempValue = analogRead(tempSensorPin);
  int gasValue = analogRead(gasSensorPin);

  // Convert analog reading to temperature (Celsius) for demonstration purposes
  float voltage = tempValue * (5.0 / 1023.0);
  float temperatureC = (voltage - 0.5) * 100; // Assuming LM35 sensor

  // Print sensor values for debugging
  Serial.print("Temperature: ");
  Serial.print(temperatureC);
  Serial.println(" °C");
  
  Serial.print("Gas Level: ");
  Serial.println(gasValue);

  // Check if either sensor exceeds the threshold
  if (temperatureC > tempThreshold || gasValue > gasThreshold) {
    // Activate buzzer and LED
    digitalWrite(buzzerPin, HIGH);
    digitalWrite(ledPin, HIGH);
  } else {
    // Deactivate buzzer and LED
    digitalWrite(buzzerPin, LOW);
    digitalWrite(ledPin, LOW);
  }

  // Wait for a short while before the next loop
  delay(500);
}