# Fire and Smoke Detection System

Welcome to the Fire and Smoke Detection System project! This project demonstrates how to create a basic detection system for both fire and smoke using the Wokwi Arduino Simulator. The system detects smoke and flames using virtual sensors and triggers an alarm when either is detected. 

## Components Used

- **Arduino UNO**: The central control unit.
- **MQ-2 Smoke Sensor**: Detects smoke levels.
- **Flame Sensor**: Detects the presence of flames.
- **1602 LCD Display**: Shows status messages.
- **Buzzer**: Sounds an alarm when fire or smoke is detected.

## Circuit Diagram

![Circuit Diagram](https://path-to-your-diagram-image)

## Wiring Connections

- **MQ-2 Smoke Sensor**:
  - VCC to 5V on Arduino
  - GND to GND on Arduino
  - AOUT to A0 on Arduino
- **Flame Sensor**:
  - VCC to 5V on Arduino
  - GND to GND on Arduino
  - DOUT to Pin 2 on Arduino
- **LCD Display**:
  - RS to Pin 8 on Arduino
  - E to Pin 9 on Arduino
  - D4 to Pin 4 on Arduino
  - D5 to Pin 5 on Arduino
  - D6 to Pin 6 on Arduino
  - D7 to Pin 7 on Arduino
- **Buzzer**:
  - Positive to Pin 10 on Arduino
  - Negative to GND on Arduino

## Arduino Code

Upload the following code to your Arduino UNO:

```cpp
#include <LiquidCrystal.h>

// Pin configuration for the MQ-2 smoke sensor
const int mq2Pin = A0; // Analog pin for MQ-2 sensor

// Pin configuration for the Flame sensor
const int flamePin = 2; // Digital pin for Flame sensor

// Pin configuration for the LCD
LiquidCrystal lcd(8, 9, 4, 5, 6, 7); // RS, EN, D4, D5, D6, D7

// Pin for the speaker or piezo element
const int speakerPin = 10; // Connect the speaker or piezo to digital pin 10

// Threshold values
const int smokeThreshold = 300; // Adjust this threshold for your smoke sensor
const int flameThreshold = LOW; // Adjust this if necessary for your flame sensor

void setup() {
  // Initialize the LCD
  lcd.begin(16, 2);

  // Initialize the MQ-2 sensor pin
  pinMode(mq2Pin, INPUT);

  // Initialize the Flame sensor pin
  pinMode(flamePin, INPUT);

  // Set up the speaker pin
  pinMode(speakerPin, OUTPUT);

  // Set up the initial display message
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Fire & Smoke");
  lcd.setCursor(0, 1);
  lcd.print("Detection");
}

void loop() {
  // Read the value from the MQ-2 smoke sensor
  int smokeValue = analogRead(mq2Pin);

  // Read the value from the Flame sensor
  int flameValue = digitalRead(flamePin);

  // Check if the smoke or flame sensor readings are above the threshold
  if (smokeValue > smokeThreshold || flameValue == flameThreshold) {
    // Clear the LCD and print the "Fire or Smoke Detected" message
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Fire or Smoke");
    lcd.setCursor(0, 1);
    lcd.print("Detected");

    // Generate a tone to create a sound
    tone(speakerPin, 1000); // You can adjust the frequency as needed
    
    // You can add additional actions here, like sending a notification.
  } else {
    // Clear the LCD and display a standby message
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("System Standby");
    
    // Turn off the tone
    noTone(speakerPin);
  }

  // Delay for a moment to avoid rapid display updates
  delay(1000);
}