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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 15:09:52 +0200
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Sorry for not mentioning that earlier…. Just thought it would complicate mu post.
Can you provide an example of two pairs SHM+GPS?
Thank you!
Sent from my iPhone
> On 11.10.2022, at 15:06, Miroslav Lichvar <mlichvar@xxxxxxxxxx> wrote:
>
> On Tue, Oct 11, 2022 at 02:51:36PM +0200, Tino Mihajlovik wrote:
>> 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.
>
> Ok, that information should have been in your first mail. I guess you
> could provide to chrony two pairs of SHM+PPS refclocks, one using your
> RTC and another the real GPS, which could be marked as trusted, so if
> both are working, the RTC-based on will be ignored.
>
> --
> Miroslav Lichvar
>
>
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