Re: 3.22 not sending PPS to SHM

[David Taylor]

On 14/01/2021 18:58, Gary E. Miller wrote:
> Yo David!
>
> On Thu, 14 Jan 2021 10:56:01 +0000
> David Taylor<gm8arv@yahoo.co.uk>  wrote:
>
> > Accept that only one device can read the serial, but in this case the
> > PPS isn't coming over the serial.
> But both gpsd and ntpd need the serial.  So that case can't work.
> Or, at least, to work properly.
>
> > I have this working well at the moment, with NTP reading PPS from
> > type 22, and getting coarse time from GPSD, so I'm minded to leave it.
> Bad idea.  Many ways that can fail.
>
> RGDS
> GARY

Gary,

In this configuration, the PPS is coming over the GPIO, and is 
independent of the serial connection. Here, ntpd type 22 driver does not 
need a serial connection.

On most of my systems I'm using that configuration, with multiple local 
stratum-1 and pool internet sources.  The PPS is a nice add-on for much 
better time-keeping, but it's not essential.  In practice there have 
been no problems - except once when a GPS-jammer equipped vehicle drove 
past!

Cheers,
David
--
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