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Results tagged with rtc
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user 136349
Questions regarding Real Time Clocks (RTCs) which can be a timekeeper IC used by microcontrollers, or using a microcontroller as an accurate timekeeper. Some have calendar, alarm, interrupt or heartbeat features, while some simply keep track of time since last programmed (Epoch timers are similar).
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DS3231 stops working on VBAT
So I had a problem with DS3231 not counting time when on VBAT. Also, I had a problem with alarm not resetting after it is triggered. I saw many people on the net having these problems, so below is the …
- 167
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DS3231 stops working on VBAT
If you want RTC to count time properly when VBAT is off, reset bit 7 in 0x0E - it ensures oscillator action on VBAT. … Here is the code in Arduino for clearing registers, then setting alarm (using DS3231.h library; this library unfortunately does not have a function to clear alarms properly):
DS3231 RTC;
Wire.beginTransmission …
- 167