Example sketch for the DS3234 SPI Real Time Clock (RTC). Prints results to an I2C LCD.

DS3234_LCD_demo2.ino

/*
 Demonstration sketch for Hobbybotics Wireless Thermostat/Temperature Node V2.0 using DS3234 RTC.
 
 Reads Date and Time.  Displays results to LCD
*/

#include <SPI.h>
#include <Wire.h>
#include <RTClib.h>
#include <DS3234.h>
#include <LCD.h>

DS3234 RTC;

// create LCD object
LCD lcd;

void setup()
{
  lcd.begin(20,4);
  lcd.clear(); 
  lcd.print("--DS3234 Demo--");
  SPI.begin();
  RTC.begin();
  if (! RTC.isrunning()) // set RTC to date & time this sketch was compiled
    RTC.adjust(DateTime(__DATE__, __TIME__));
}

void loop()
{
  DateTime now = RTC.now();
  int hour = now.hour();
  int minute = now.minute();
  int second = now.second();
  int day = now.day();
  int month = now.month();
  int year = now.year();
  int dayofweek = now.dayOfWeek();
  
  lcd.setCursor(0,1);
  lcd.print(day);
  lcd.print("/");
  lcd.print(month);
  lcd.print("/");
  lcd.print(year);
  lcd.print(" ");
  
  if (hour < 10){
    lcd.print("0");
  }
  lcd.print(hour);
  lcd.print(":");
  
  if (minute < 10){
    lcd.print("0");
  }
  lcd.print(minute);
  lcd.print(":");
  
  if (second < 10){
    lcd.print("0");
  }
  lcd.print(second);
  
  if (hour < 12)
    lcd.print("A");
  else
    lcd.print("P");
       
  lcd.setCursor(0,2);
  
  switch (dayofweek)
  {
    case 1: lcd.print("Monday"); break;
    case 2: lcd.print("Tuesday"); break;
    case 3: lcd.print("Wednesday"); break;
    case 4: lcd.print("Thursday"); break;
    case 5: lcd.print("Friday"); break;
    case 6: lcd.print("Saturday"); break;
    case 7: lcd.print("Sunday"); break;
  }
  delay(1000);
}