#include "RTClib.h"
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27,16,2);
RTC_DS1307 rtc;
char DaysAndWeek [7][12] = {"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
void setup() {
  // put your setup code here, to run once:
Serial.begin(115200);

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

void loop() {
  // put your main code here, to run repeatedly:
lcd.init();
    DateTime now = rtc.now();
    lcd.backlight();
    //ช่วง ปีเดือน วัน
    lcd.setCursor(0,0);
    lcd.print(now.year(), DEC);
    lcd.setCursor(4,0);
    lcd.print("/");
    lcd.setCursor(5,0);
    lcd.print(now.month(), DEC);
    lcd.setCursor(6,0);
    lcd.print("/");
    lcd.setCursor(7,0);
    lcd.print(now.day(), DEC);
    //ช่วงเวลา ชั่วโมง นาที วินาที
    lcd.setCursor(10,1);
    lcd.print(DaysAndWeek[now.dayOfTheWeek()]);
    lcd.print("/");
    lcd.setCursor(3,1);
    lcd.setCursor(0,1);
    lcd.print(now.hour(), DEC);
    lcd.print("/");
    lcd.setCursor(5,1);
    lcd.setCursor(3,1);
    lcd.print(now.minute(), DEC);
    lcd.print("/");
    lcd.setCursor(8,0);
    lcd.setCursor(6,1);
    lcd.print(now.second(), DEC);
    Serial.print("Current time: ");
    Serial.print(now.year(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.day(), DEC);
    Serial.print(" (");
    Serial.print(DaysAndWeek[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();
  Serial.println();
  delay(30);
}