#include <RTClib.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27,20,4);

String dias_semana[7] = {"Lunes", "Martes", "Miercoles", "Jueves", "Viernes", "Sabado", "Domingo"};

void setup() {
  Serial.begin(115200);
  Wire.begin();
  rtc.begin();
  lcd.init(); //Inicia pantalla
  lcd.backlight(); //Iluminacion led pantalla
}

void loop() {
  DateTime now = rtc.now();
  lcd.setCursor(0,0);
  lcd.print(String(dias_semana[now.dayOfTheWeek()-1]));
  lcd.print("   ");
  lcd.setCursor(0,1);
  lcd.print(String(now.day()) + "/" + String(now.month()) + "/" + String(now.year()));
  lcd.print("   ");
  lcd.setCursor(0,3);
  lcd.print(String(now.hour()) + ":" + String(now.minute()) + ":" + String(now.second()));
  lcd.print("   ");
}