[arm-allstar] Frustrated by time ???

[David McGough]

Hi Everyone,

I thought I'd mention that Doug's simple RTC project is a VERY good 
solution where Internet access isn't guaranteed. The big positives points 
with the RTC are that it's self contained, with no external parts.

Another solution is to use a USB GPS puck; the drawback of the GPS
solution being that the GPS must be located where it see the satellites.  
Note that the gpsd software is already part of the 1.2.1 release. I've
used GPS units like this one, previously, for both time and APRS position.
They work well....See:  http://www.ebay.com/itm/181490131179

I'll mention further that this GPS isn't a "precision" time solution, with
sub-millisecond accuracy! But, it will give you better than 1 second
accuracy reliably and continuously.

73, David KB4FXC



On Tue, 16 Dec 2014, Doug Crompton wrote:

> Thanks for sharing that Ian. Yes you do need access to an ntp server 
unless you build up the real time clock.
> 
> I will report that my test system with the real time clock (no ntp 
updates) has kept excellent time. It has gained about 15 seconds in a 
month of operation. This is however at a fairly constant 72 degree F room 
temperature. It is certainly better to use ntp if you can.
> 73 Doug
> WA3DSP
> http://www.crompton.com/hamradio
> 
> 
> > Date: Tue, 16 Dec 2014 16:53:20 +0000
> > From: gm4upx at gb7jd.co.uk
> > To: arm-allstar at hamvoip.org
> > Subject: [arm-allstar] Frustrated by time ???
> > 
> > I thought I would share this :-
> > 
> > If, like me, you have tried to change the time in Arch after a reboot 
> > because the date/time has gone back to 2000 and each time you try you 
> > fail as the system won't let you for one reason or another, the cure is 
> > simple.
> > 
> > Yesterday I tried all the suggested cmds [ ntpdq -p ] etc. but none 
> > would work.
> > 
> > I have a PC router with three network cards in it and unbeknown to me 
> > the one that connected me to the outside world had failed; as soon as I 
> > got it working the time " magically " was back to normal.
> > 
> > Moral of story; the fault is not always where you think it is.. No 
> > internet connection, no correct time..
> > 
> > Regards,
> > 
> > Ian..
> > _______________________________________________
> > 
> > arm-allstar mailing list
> > arm-allstar at hamvoip.org
> > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> > 
> > Visit the BBB web page - http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/
> > 
>