#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#define DHTPIN 4
#define DHTTYPE DHT22
#define MQ7_ANA A1
#define MQ7_DIG 3
#define Threshold 400
#define greenLED 7 
#define redLED 2

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);
int buzzerPin = 12;
int ledPin = 5;
float flamelevel = 0; 
const int minSurvive = 15; 
const int idleLow = 20; 
const int idleTarget = 30; 
const int firingLow = 70; 
const int firingHigh = 90;
bool isFireDetected = false;
bool showFlame = true;

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.setCursor(2, 0);
  lcd.print("PENDETEKSI");
  lcd.setCursor(2, 1);
  lcd.print("KEBAKARAN");
  delay(2000);
  lcd.clear();
  Serial.begin(9600);
  pinMode(MQ7_ANA, INPUT);
  pinMode(MQ7_DIG, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(redLED, OUTPUT);
  dht.begin();
}

void loop() {
  float t = dht.readTemperature();
  float analogValue = analogRead(A0);  
  int smokeLevel = analogRead(MQ7_ANA);
  Serial.print("Sensor : ");
  Serial.println(analogValue, 0);
  flamelevel = map(analogValue, 0, 1024, 0, 100);
  Serial.print(flamelevel, 0);
  Serial.println("%");
  Serial.print(smokeLevel);
  

  if (showFlame) {
    lcd.setCursor(0, 0);
    lcd.print("Flame Level: ");
    lcd.print(flamelevel, 0);
    lcd.print("%    ");
  } else {
    lcd.setCursor(0, 0);
    lcd.print("Temp: ");
    lcd.print(t);
    lcd.print(" C       ");
  }


if (smokeLevel > Threshold && !isFireDetected) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("KEBAKARAN!");
    tone(buzzerPin, 2000); 
    delay(1000); 
    digitalWrite(ledPin, HIGH);
    isFireDetected = true;
} else if (smokeLevel <= Threshold && isFireDetected) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Tidak Kebakaran");
    noTone(buzzerPin); // Mematikan suara buzzer
    digitalWrite(ledPin, LOW);
    isFireDetected = false;
}

  delay(1000);
  showFlame = !showFlame; // Toggle between showing flame level and temperature
}