#include <Wire.h>
#include <RtcDS3231.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
RtcDS3231<TwoWire> Rtc(Wire);

uint8_t month, day, hour, minute, second;
uint16_t year;

void setup() 
{
    Serial.begin(57600);
    lcd.begin(16, 2);
    lcd.backlight();
    lcd.setCursor(0, 0);
    
    /*********************** RTC Setting *********************/
    Rtc.Begin();
    
    RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
    RtcDateTime now = Rtc.GetDateTime();
    
    // Set the RTC to the current time if it is behind the compile time
    if (now < compiled) Rtc.SetDateTime(compiled);

    Rtc.Enable32kHzPin(false);
    Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeNone);
    /*********************************************************/
}

void loop() 
{
    /**********************************/
    RtcDateTime now = Rtc.GetDateTime();
    printDateTime(now);
    delay(1000); // Update the time every second
    /**********************************/
}

void printDateTime(const RtcDateTime& dt)
{
    year   = dt.Year();
    month  = dt.Month();
    day    = dt.Day();
    hour   = dt.Hour();
    minute = dt.Minute();
    second = dt.Second();
    
    // Create a formatted string with the date and time
    String str = String(day) + 
                 "/" + String(month) + 
                 "/" + String(year) + 
                 " " + String(hour) + 
                 ":" + String(minute) + 
                 ":" + String(second);
    
    // Print to Serial Monitor
    Serial.println(str);
    
    // Display the date and time on the LCD
    lcd.clear(); // Clear the previous display
    lcd.setCursor(0, 0); // Set cursor to the first line
    lcd.print(day);
    lcd.print('/');
    lcd.print(month);
    lcd.print('/');
    lcd.print(year);
    lcd.setCursor(0, 1); // Set cursor to the second line
    lcd.print(hour);
    lcd.print(':');
    lcd.print(minute);
    lcd.print(':');
    lcd.print(second);
}