#include "WiFi.h"
#include "NTPClient.h"
#include "WiFiUdp.h"
#include "LiquidCrystal_I2C.h"
#include "Wire.h"
#include "RTClib.h"

const long utcOffsetInSeconds = -4 * 3600;
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);

RTC_DS1307 rtc;

const char* ssid = "Wokwi-GUEST";
const char* password = "";

LiquidCrystal_I2C lcd(0x27,20,4);

void setup() {
  lcd.init(); //Inicia o display LCD
  lcd.backlight(); //Liga o backlight do display LCD

  Serial.begin(115200);
  WiFi.begin(ssid, password);
  delay(3000);
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (1) delay(10);
  }
  timeClient.begin();
  timeClient.update();
  if (WiFi.status() == WL_CONNECTED) {
    rtc.adjust( DateTime(timeClient.getEpochTime()) );
  }
}

void loop() {

  DateTime now = rtc.now();

  lcd.setCursor(0,0);
  if(now.day() < 10)
    lcd.print("0");
  lcd.print(now.day());
  lcd.print("/");
  if(now.month() < 10)
    lcd.print("0");
  lcd.print(now.month());
  lcd.print("/");
  lcd.println(now.year());
  lcd.setCursor(0,1);
  if(now.hour() < 10)
    lcd.print("0");
  lcd.print(now.hour());
  lcd.print(':');
  if(now.minute() < 10)
    lcd.print("0");
  lcd.print(now.minute());
  lcd.print(':');
  if(now.second() < 10)
    lcd.print("0");
  lcd.println(now.second());

  delay(1000);
}