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

RTC_DS1307 rtc; //Cria objeto do tipo RTC_DS1307 com o nome rtc

LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
 lcd.init();
 lcd.setBacklight(1);
 rtc.begin(); //inicializa RTC
 rtc.adjust(DateTime(2024,10,15,21,42,00)); //Acerta RTC: DateTime(ano,mes,dia,hora,minuto,segundos)

tone(2,440, 1000);
}

void loop() {

  DateTime datahora = rtc.now(); //obtem data e hora
  lcd.setCursor(4,0);
  lcd.print(datahora.day());
  lcd.print("/");
  lcd.print(datahora.month());
  lcd.print("/");
  lcd.print(datahora.year());

  lcd.setCursor(4,1);
  lcd.print(datahora.hour());
  lcd.print(":");
  lcd.print(datahora.minute());
  lcd.print(":");
  lcd.println(datahora.second());

  lcd.setCursor(4,2);
  switch(datahora.dayOfTheWeek()){
    case 0: lcd.print("Dom"); break;
    case 1: lcd.print("Seg"); break;
    case 2: lcd.print("Ter"); break;
    case 3: lcd.print("Qua"); break;
    case 4: lcd.print("Qui"); break;
    case 5: lcd.print("Sex"); break;
    case 6: lcd.print("Sab"); break;
   
  }
   delay(1000);

 }