[time-nuts] Designing an embedded precision GPS time

MLewis mlewis000 at rogers.com
Tue Oct 31 22:27:29 EDT 2017


I'm intending to add a "precision" (well, precision to the Pi world) RTC 
to my Pi 3 to use for a holdover source when it hasn't got PPS from the 
GPS module.

On 31/10/2017 10:04 PM, Chris Caudle wrote:
> On Tue, October 31, 2017 7:19 pm, MLewis wrote:
>> ...the "better" quality RTCs seem to be DS3231 based
>> How does one translate that into an expected 24 hour holdover?
> For the RTC, or for an NTP server?  If the NTP server is running it will
> not make a difference, modern operating systems do not use the RTC for the
> system clock, only to get close to the correct time at startup.
>




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