#include <OneWire.h>                
#include <DallasTemperature.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
OneWire ourWire(2);                //Se establece el pin 2  como bus OneWire
DallasTemperature sensors(&ourWire); //Se declara una variable u objeto para nuestro sensor

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  LCD.setCursor(15, 1);
  LCD.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

byte grado[8] = {
  B01110,
  B10001,
  B10001,
  B01110,
  B00000,
  B00000,
  B00000,
  B00000
};

byte cuerpo[8] = {
  B00000,
  B10001,
  B00000,
  B00000,
  B10001,
  B01110,
  B00000,
};


const int LED = 11;

void setup() {
LCD.createChar (0, grado);
LCD.createChar (1, cuerpo);
pinMode(LED_BUILTIN, OUTPUT);
pinMode(4, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);

Serial.begin(9600);
sensors.begin();   //Se inicia el sensor

LCD.init();
LCD.backlight();
LCD.setCursor(0, 0);
LCD.print("Electro: ");
LCD.setCursor(0, 1);
LCD.print("Temp: ");
LCD.setCursor(11, 1);
LCD.write (byte (0));

  for( int l=9; l<12; l++) {
    digitalWrite(l, HIGH);
    digitalWrite(l-1, LOW);
    delay (500);
  }
  for( int l=9; l<12; l++) {
    digitalWrite(l, LOW);
  }
  spinner();
}
 
void loop() {
sensors.requestTemperatures();   //Se envía el comando para leer la temperatura
float temp= sensors.getTempCByIndex(0); //Se obtiene la temperatura en ºC
  if (temp > 80) {
    digitalWrite(4, HIGH);
    alerta(LED);
    LCD.setCursor(9, 0);
    LCD.print("ENCEND.");
  }
  else { digitalWrite(4, LOW);
    LCD.setCursor(9, 0);
    LCD.print("APAGADO");
  }
digitalWrite(LED_BUILTIN, HIGH);

Serial.print("  Temperatura: ");
Serial.print(temp, 1);
Serial.println(" ºC");

LCD.setCursor(6, 1);
LCD.print(temp, 1);
LCD.setCursor(11, 1);
LCD.write (byte (0));
LCD.print("C");

delay(3000);
digitalWrite(LED_BUILTIN, LOW);                     
}

// hace parpadear un led 3 veces
void alerta(int led){
  digitalWrite(led, HIGH);
  delay(200);
  digitalWrite(led, LOW);
  delay(200);
  digitalWrite(led, HIGH);
  delay(200);
  digitalWrite(led, LOW);
  delay(200);
  digitalWrite(led, HIGH);
  delay(200);
  digitalWrite(led, LOW);
  delay(200);
}