commit 38c424b461d40fdd937bf8408561da2044f1b46a
Author: James Devine <devine.jd@gmail.com>
Date:   Wed Feb 7 08:41:24 2018 +0100

diff --git a/realtimeclock.ino b/realtimeclock.ino
new file mode 100644
index 0000000..8779db1
--- /dev/null
+++ b/realtimeclock.ino
@@ -0,0 +1,98 @@
+/****************************************************************************/
+//  Function: Set time and get the time from RTC chip(PCD85063TP) and display
+//            it on the serial monitor.
+//  Hardware: Grove - RTC v2.0
+//  Arduino IDE: Arduino-1.6.6
+//  Author:   lambor
+//  Date:    June 14,2016
+//  Version: v1.0
+//  by www.seeedstudio.com
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later verscion.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+//
+/****************************************************************************/
+#include <Wire.h>
+#include "PCF85063TP.h"
+
+PCD85063TP xclock;//define a object of PCD85063TP class
+void setup()
+{
+  Serial.begin(9600);
+  xclock.begin();
+ 
+  xclock.stopClock();
+  xclock.fillByYMD(2018,2,7);//Jan 19,2013
+  xclock.fillByHMS(00,25,45);//15:28 30"
+  xclock.fillDayOfWeek(WED);//Saturday
+  xclock.setTime();//write time to the RTC chip
+  xclock.startClock();
+
+
+  xclock.setcalibration(1, 32768);  // Setting offset by xclock frequency
+  uint8_t ret = xclock.calibratBySeconds(0, -0.000041);
+  Serial.print("offset value: ");
+  Serial.print("0x");
+  Serial.println(ret, HEX);
+ 
+}
+void loop()
+{
+  printTime();
+  delay(1000);
+}
+/*Function: Display time on the serial monitor*/
+void printTime()
+{
+  xclock.getTime();
+  Serial.print(xclock.hour, DEC);
+  Serial.print(":");
+  Serial.print(xclock.minute, DEC);
+  Serial.print(":");
+  Serial.print(xclock.second, DEC);
+  Serial.print("  ");
+  Serial.print(xclock.month, DEC);
+  Serial.print("/");
+  Serial.print(xclock.dayOfMonth, DEC);
+  Serial.print("/");
+  Serial.print(xclock.year+2000, DEC);
+  Serial.print(" ");
+  Serial.print(xclock.dayOfMonth);
+  Serial.print("*");
+  switch (xclock.dayOfWeek)// Friendly printout the weekday
+  {
+    case MON:
+      Serial.print("MON");
+      break;
+    case TUE:
+      Serial.print("TUE");
+      break;
+    case WED:
+      Serial.print("WED");
+      break;
+    case THU:
+      Serial.print("THU");
+      break;
+    case FRI:
+      Serial.print("FRI");
+      break;
+    case SAT:
+      Serial.print("SAT");
+      break;
+    case SUN:
+      Serial.print("SUN");
+      break;
+  }
+  Serial.println(" ");
+}
\ No newline at end of file