Интернет часы ESP8266 + LCD1602_I2C

#include <NTPClient.h>
#include <ESP8266WiFi.h> 
#include <WiFiUdp.h> 
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
 LiquidCrystal_I2C lcd(0x27,16,2);  // Устанавливаем дисплей
 WiFiUDP ntpUDP;
 NTPClient timeClient(ntpUDP, "pool.ntp.org", 21600,60000);
 const char *ssid     = "Redmi Note 3";
 const char *password = "32481975";
 String date_time;

void setup(){
  Serial.begin(9600);
  WiFi.begin(ssid, password);
  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
    timeClient.begin();}
  lcd.init();                    
  lcd.backlight();// Включаем подсветку дисплея
}

void loop(){
  timeClient.update();
  int hh = timeClient.getHours();
  int mm = timeClient.getMinutes();
  int ss = timeClient.getSeconds();
  date_time = timeClient.getFormattedDate();
  int index_date = date_time.indexOf("T");
  String date = date_time.substring(0, index_date);
 

  lcd.setCursor(4,0);
  lcd.print(hh/10);lcd.print(hh%10);lcd.print(":");
  lcd.print(mm/10);lcd.print(mm%10);lcd.print(":");
  lcd.print(ss/10);lcd.print(ss%10);
  lcd.setCursor(3,1);
  lcd.print(date);
 
  }