const int Min = 0;    
const int Max = 1024;  
const int buzzer = 5;
 
void setup()  {
  Serial.begin(9600);  
  pinMode(buzzer, OUTPUT);
  lcd.begin(16, 2);
  lcd.print("Hello, world!");
 
}
void loop() {
 
  int detector  = analogRead(A0);
           // map(value, fromLow, fromHigh, toLow, toHigh)
  int range = map(detector,  Min, Max, 0, 3);
 
  // 4 CASOS DISTINTOS DE FUEGO definidos en la funcion map (range var)
  switch (range) {
  case 0:    // A fire closer than 1.5 feet away.
    Serial.println("** LEJOS **");
    tone(buzzer, 10);
    delay(100);
    noTone(buzzer);
    delay(100);
    break;
  case 1:    // A fire between 1-3 feet away.
    Serial.println("**  CERCA **");
    tone(buzzer, 100);
    delay(100);
    noTone(buzzer);
    delay(100);
    break;
  case 2:    // No fire
    Serial.println("NO FUEGO");
    break;
  }
  delay(10); 
}

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