// Include the LiquidCrystal library
#include <LiquidCrystal.h>

// Define pin connections
const int buzzerPin = 2;              
const int additionalLedPin = 6; 
const int smokeSensorPin = A0; 
const int fireSensorPin = A1;   
// LCD setup
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);  // RS, E, D4, D5, D6, D7

void setup() {
  // Initialize LCD
  lcd.begin(16, 2);
  lcd.print("Fire & Smoke");

  // Initialize buzzer and LEDs
  pinMode(buzzerPin, OUTPUT);
  pinMode(additionalLedPin, OUTPUT); 


  digitalWrite(additionalLedPin, LOW);
}

void loop() {

  int smokeValue = analogRead(smokeSensorPin);
  int fireValue = analogRead(fireSensorPin);


  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Smoke: ");
  lcd.print(smokeValue);

  lcd.setCursor(0, 1);
  lcd.print("Fire: ");
  lcd.print(fireValue);


  if (smokeValue > 500) {

    activateSmokeAlarm();
  }

  if (fireValue > 700) {

    activateFireAlarm();
  }
}

void activateSmokeAlarm() {
  lcd.clear();
  lcd.print("Smoke Detected!");

  digitalWrite(buzzerPin, HIGH);
  digitalWrite(additionalLedPin, HIGH);

  lcd.setCursor(0, 1);
  lcd.print("Sound Alert!");


  tone(buzzerPin, 1000);  


  delay(5000);


  noTone(buzzerPin);

  digitalWrite(additionalLedPin, LOW);
}

void activateFireAlarm() {
  lcd.clear();
  lcd.print("Fire Detected!");


  digitalWrite(buzzerPin, HIGH);
  digitalWrite(additionalLedPin, HIGH);


  lcd.setCursor(0, 1);
  lcd.print("Sound Alert!");

  // Sound the buzzer
  tone(buzzerPin, 1500);  

  delay(5000);


  noTone(buzzerPin);
  digitalWrite(additionalLedPin, LOW);
}