[onkel]

Your code did not work but i fixed it by replacing the code in adjustClock() to:

if (rtc.isrunning()) {
now = rtc.now();
rtc.adjust(DateTime(now.year(), now.month(), now.day(), currentHour, currentMinute, currentSecond));
} else {
rtc.adjust(DateTime(__DATE__, __TIME__));
}

This way the RTC is set to DATE/TIME when you first flash the firmware and after you can use the manual clock setting to adjust hour/minutes using the current date.

[onkel]

Never mind. I guess i found that you just need to replace “adjustClock()” with:

if (!rtc.isrunning()) rtc.adjust(DateTime(__DATE__, __TIME__));

Testing this tomorrow.

[onkel]

I have made the hardware hack.

Please share the customized firmware to support the DS1307 with battery.

[Author]

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