#include <Wire.h>                     // usando a biblioteca Wire
#include <LiquidCrystal_I2C.h>        // usando a biblioteca LiquidCrystal I2C

LiquidCrystal_I2C lcd(0x27, 16, 2);  // Configura endereço I2C e display com 16 caracteres e 2 linhas 
int thisChar = 0 ;

#include "RTClib.h"

RTC_DS1307 rtc;

char daysOfTheWeek[7][5] = {"Seg", "Ter", "Qua", "Qui", "Sex", "Sab", "Dom"};


void setup()
{
  lcd.init();                      // inicializa LCD
  lcd.backlight();                 // ativa led de backlight

  Serial.begin(115200);

  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
}

void loop ()                     
{
  DateTime now = rtc.now();

  Serial.print("Current time: ");
  Serial.print(now.day(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.year(), DEC);
  Serial.print(" (");
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  Serial.print(") ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();

  lcd.setCursor(0, 0);            // selecionando coluna 0 e linha 0
  lcd.print(daysOfTheWeek[now.dayOfTheWeek()]);
  lcd.print(" ");
  lcd.print(now.day(), DEC);
  lcd.print('/');
  lcd.print(now.month(), DEC);
  lcd.print('/');
  lcd.print(now.year(), DEC);
  lcd.setCursor(2, 1);            // selecionando coluna 2 e linha 1
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);
  //lcd.print("Guia do LCD");       // Print da mensagem
  delay(1000);                    // atraso de 1 segundo
}