Hi,
I set the examples up that way rather than assume the user had any specific hardware connected. Which example sketch are you using?
Here is a modification of the "Clock" example sketch. Please give it a try and let me know if it works for you, and I'll include it as another example in the Library.
Basically, the "Clock" example includes a function compileTime() which is called from setup() to set the time. That call needs to be deleted, and replaced by a call to setSyncProvider() which will cause the Time library to synchronize with the RTC. Also see the "TimeRTC" example sketch that comes with the Time library.
HTH ... jc
/*----------------------------------------------------------------------*
* Timezone library example sketch. *
* Self-adjusting clock for one time zone using an external real-time *
* clock, either a DS1307 or DS3231 (e.g. Chronodot). *
* Assumes the RTC is set to UTC. *
* TimeChangeRules can be hard-coded or read from EEPROM, see comments. *
* Check out the Chronodot at http://www.macetech.com/store/ *
* *
* Jack Christensen Aug 2012 *
* *
* This work is licensed under the Creative Commons Attribution- *
* ShareAlike 3.0 Unported License. To view a copy of this license, *
* visit http://creativecommons.org/licenses/by-sa/3.0/ or send a *
* letter to Creative Commons, 171 Second Street, Suite 300, *
* San Francisco, California, 94105, USA. *
*----------------------------------------------------------------------*/
#include <DS1307RTC.h> //http://www.arduino.cc/playground/Code/Time
#include <Time.h> //http://www.arduino.cc/playground/Code/Time
#include <Timezone.h> //https://github.com/JChristensen/Timezone
#include <Wire.h> //http://arduino.cc/en/Reference/Wire (supplied with the Arduino IDE)
//US Eastern Time Zone (New York, Detroit)
TimeChangeRule myDST = {"EDT", Second, Sun, Mar, 2, -240}; //Daylight time = UTC - 4 hours
TimeChangeRule mySTD = {"EST", First, Sun, Nov, 2, -300}; //Standard time = UTC - 5 hours
Timezone myTZ(myDST, mySTD);
//If TimeChangeRules are already stored in EEPROM, comment out the three
//lines above and uncomment the line below.
//Timezone myTZ(100); //assumes rules stored at EEPROM address 100
TimeChangeRule *tcr; //pointer to the time change rule, use to get TZ abbrev
time_t utc, local;
void setup(void)
{
Serial.begin(115200);
setSyncProvider(RTC.get); // the function to get the time from the RTC
if(timeStatus()!= timeSet)
Serial.println("Unable to sync with the RTC");
else
Serial.println("RTC has set the system time");
}
void loop(void)
{
Serial.println();
utc = now();
printTime(utc, "UTC");
local = myTZ.toLocal(utc, &tcr);
printTime(local, tcr -> abbrev);
delay(10000);
}
//Function to print time with time zone
void printTime(time_t t, char *tz)
{
sPrintI00(hour(t));
sPrintDigits(minute(t));
sPrintDigits(second(t));
Serial.print(' ');
Serial.print(dayShortStr(weekday(t)));
Serial.print(' ');
sPrintI00(day(t));
Serial.print(' ');
Serial.print(monthShortStr(month(t)));
Serial.print(' ');
Serial.print(year(t));
Serial.print(' ');
Serial.print(tz);
Serial.println();
}
//Print an integer in "00" format (with leading zero).
//Input value assumed to be between 0 and 99.
void sPrintI00(int val)
{
if (val < 10) Serial.print('0');
Serial.print(val, DEC);
return;
}
//Print an integer in ":00" format (with leading zero).
//Input value assumed to be between 0 and 99.
void sPrintDigits(int val)
{
Serial.print(':');
if(val < 10) Serial.print('0');
Serial.print(val, DEC);
}