// #include <LiquidCrystal_I2C.h>

// // set the LCD number of columns and rows
// int lcdColumns = 16;
// int lcdRows = 2;

// // set LCD address, number of columns and rows
// // if you don't know your display address, run an I2C scanner sketch
// LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);  

// void setup(){
//   // initialize LCD
//   lcd.init();
//   // turn on LCD backlight                      
//   lcd.backlight();
// }

// void loop(){
//   // set cursor to first column, first row
//   lcd.setCursor(0, 0);
//   // print message
//   lcd.print("Hello, World!");
//   delay(1000);
//   // clears the display to print new message
//   lcd.clear();
//   // set cursor to first column, second row
//   lcd.setCursor(0,1);
//   lcd.print("Hello, World!");
//   delay(1000);
//   lcd.clear(); 
// }


#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include "RTClib.h"
 
RTC_DS3231 rtc;
 
char daysOfTheWeek[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
 
int Day; 
int Month;
int Year; 
int Secs;
int Minutes;
int Hours;
 
String dofweek; // day of week
 
String myDate; 
String myTime; 

int lcdColumns = 16;
int lcdRows = 2;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);  
 
void setup () 
{
  Serial.begin(9600);
  delay(3000); // wait for console opening
 
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
 
  if (rtc.lostPower()) {
    Serial.println("RTC lost power, lets set the time!");
  
  // Comment out below lines once you set the date & time.
    // Following line sets the RTC to the date & time this sketch was compiled
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  
    // Following line sets the RTC with an explicit date & time
    // for example to set January 27 2017 at 12:56 you would call:
    // rtc.adjust(DateTime(2017, 1, 27, 12, 56, 0));
  }
  // initialize LCD
  lcd.init();
  // turn on LCD backlight                      
  lcd.backlight();
}
 
void loop () 
{
  DateTime now = rtc.now();        
  Day = now.day(); 
  Month = now.month(); 
  Year = now.year();
  Secs = now.second(); 
  Hours = now.hour(); 
  Minutes = now.minute(); 
  dofweek = daysOfTheWeek[now.dayOfTheWeek()];  
  
  myDate = myDate +dofweek+ " "+ Day + "/" + Month + "/" + Year ; 
  myTime = myTime + Hours +":"+ Minutes +":" + Secs ; 
  // send to serial monitor
  Serial.println(dofweek); 
  Serial.println(myDate); 
  Serial.println(myTime);
  //Print on lcd
  lcd.setCursor(0, 0);
  // print message
  lcd.print(myDate);
  lcd.setCursor(0, 1);
  // print message
  lcd.print(myTime);
  // clears the display to print new message
  myDate = "";   
  myTime = ""; 
  delay(1000);
  lcd.clear();
}