#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);  

float flamelevel = 0; 
#define greenLED 7 
#define redLED 2 

const int firingHigh = 50; 
const int firingLOW = 5; 


void setup() {
  lcd.init();
  lcd.clear();
  lcd.backlight();
  

  pinMode(greenLED, OUTPUT); 
  digitalWrite(greenLED, LOW);

  pinMode(redLED, OUTPUT); 
  digitalWrite(redLED, LOW); 

  pinMode(A2, OUTPUT); 
}

void loop() 
{
  float analogValue = analogRead(A0);
  
  flamelevel = map(analogValue, 0, 1024, 100, 0);
 
  lcd.setCursor(0, 0);
  

  if ((flamelevel < firingHigh ) && ( flamelevel > firingLOW))
  { 
    lcd.clear();
    lcd.print("Risque");
    digitalWrite(greenLED, LOW); 

    digitalWrite(redLED, HIGH); 
    delay(300);
    digitalWrite(redLED, LOW); 
    delay(300);
  }

  if (flamelevel >= firingHigh) 
  { 
    
    lcd.print("Incendie");
    digitalWrite(redLED, HIGH); 
    digitalWrite(greenLED, LOW); 
    tone(A2, 9397, 1000); 
  }

  if (flamelevel <= firingLOW) 
  {
    
    lcd.print("Normal");
    digitalWrite(greenLED, HIGH); 
    digitalWrite(redLED, LOW); 
  }

}