Teensy 3.5 RTC problem

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hathatool

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Hi
I try to write a control program with a time code
i want to write in the file and on screen the date and time (dd/mm/yyyy hh/mm/ss)
i write this simple program:

#include <TimeLib.h>

// Variable Declaretion -----------------------------------------------------------

//Time And Date Variables ---------------------------------------------------------

String DandT;
int Sec;
int Mint;
int Hr;
int Dy;
int Mnth;
int Yr;
String SSec;
String SMint;
String SHr;
String SDy;
String SMnth;
String SYr;

//----------------------------------------------------------------------------------


void setup() {

Serial.begin(9600);

// Clock Setup Only For The First Time ---------------------------------------------
setTime(22, 34, 25, 29, 3, 1982);
//----------------------------------------------------------------------------------

}




void loop() {

// SetUp Time String For Display --------------------------------------------------
Sec=int(second());
Mint=int(minute());
Hr=int(hour());
Dy=int(day());
Mnth=int(month());
Yr=int(year());

if (Sec<10){
SSec="0"+String(Sec);
}else{
SSec=String(Sec);
}
if (Mint<10){
SMint="0"+String(Mint);
}else{
SMint=String(Mint);
}
if (Hr<10){
SHr="0"+String(Hr);
}else{
SHr=String(Hr);
}
if (Dy<10){
SDy="0"+String(Dy);
}else{
SDy=String(Dy);
}
if (Mnth<10){
SMnth="0"+String(Mnth);
}else{
SMnth=String(Mnth);
}
SYr=String(Yr);


DandT=(SDy+"/"+SMnth+"/"+SYr+" "+SHr+":"+SMint+":"+SSec);

//------------------------------------------------------------------------------------


Serial.println (DandT);



delay (500);


}

time_t getTeensy3Time()
{
return Teensy3Clock.get();
}



A 3V battery is connected to the Vb pin and to the GND

but when i delete the set time line it is always go back to 1.1.1970

why?
how can i keep the time from restarted again every time?

thank you
 
Hi
Thanks for the answering
But I still do not understand/able to sync them to work properly
When I run the teensy3 example the rtc is sync with my computer and run OK, i connect the battery and just can not syc it back
(probably a noob problem)

thanks for any one that solve this problem
 
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