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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] Chrony problem - not synchronizing time
- From: Tino Mihajlovik <tinomk@xxxxxxxxx>
- Date: Tue, 11 Oct 2022 14:51:36 +0200
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Yes it is special setup.
We have custom board with GPS, DS3231, FT232RL and microprocessor. The idea is that microprocesor always mimics the NMEA sequence together with the PPS signal on the USB port. When GPS is stable the real NMEA message is just forwarded together with the PPS signal. When GPS is not avialable the microprocessor sends NMEA data that is stored to the DS3231.
Sent from my iPhone
> On 11.10.2022, at 11:31, Miroslav Lichvar <mlichvar@xxxxxxxxxx> wrote:
>
> On Tue, Oct 11, 2022 at 11:26:06AM +0200, Tino Mihajlovik wrote:
>> They are related with Lock option.
>
> I mean, are the PPS and GPS refclocks related to the same time source?
> Normally, you would want to use the GPS refclock only for locking PPS,
> and PPS only for synchronization. If the GPS loses its fix, gpsd will
> stop providing new samples and the PPS lock will break.
>
> From your questions I assume you have a special setup.
>
> --
> Miroslav Lichvar
>
>
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