[time-nuts] Soekris without a GPS receiver.

Chris Albertson albertson.chris at gmail.com
Sun Dec 28 22:33:00 EST 2014


Can't you combine a few Internet pool NTP servers with a local 1PPS
source?  The Internet servers will "name the seconds".

Also if you really need a Motorola Oncore you can buy them for $20 on
eBay.  There is no shortage.  I paid $18 with free shipping for a UT+

I run the UT+ and leave the Thunderbolt powered off most of the time
because the power used by the TB is so high compared to the very modest
power draw of the UT+

On Sat, Dec 27, 2014 at 10:05 PM, Mike Cook <michael.cook at sfr.fr> wrote:

> I have had a look at the NTPns package and I don’t think that you will be
> able do what you want without something naming the seconds. As you have
> GPSDO’s to give you UTC aligned seconds you may be able to use the voice
> time service TIM to help you manually set the system clock to the nearest
> sec and then just have the 1PPS on gpio to get align the seconds to UTC. I
> have done this and it works ok. However, you won’t get the upcoming leap
> second adjustment (my bet is on Jun 30 next year, but it could be pushed
> out to Dec31 ). If you are not using snmp, you will not be able to do
> monitoring either.
>
> I would be inclined to use  NTP rather than NTPns as per <
> http://www.febo.com/pages/soekris>. I know that the 4501 has only 128Mb ,
> but that is easily enough.
>
>
>
> > Le 27 déc. 2014 à 10:56, David J Taylor <david-taylor at blueyonder.co.uk>
> a écrit :
> >
> > I have a Soekris 4501 running with NanoBSD and have got as far as adding
> the PPS/DCD/GPIO modifications to the hardware.  NTPns itself is working,
> and the red LED is flashing as expected.
> >
> > I would now like to get NTPns working with that more precise timing
> which is available, but as I don't have an Oncore or a DCF77 receiver I am
> stuck.  Is it possible to use just the PPS/DCD line on its own for the
> fraction of the seconds, or would I need one or other of those receivers to
> make it work? If it can be made to work, what are suitable configuration
> commands?
> >
> > Thanks,
> > David
> > --
> > SatSignal Software - Quality software written to your requirements
> > Web: http://www.satsignal.eu
> > Email: david-taylor at blueyonder.co.uk
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-- 

Chris Albertson
Redondo Beach, California


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