Re: [gpsd-users] Trimble GPS model 57963

[Chris Kuethe]

Thanks for the info.

"Obscure" and "obsolete" don't necessarily disqualify a device from
being supported by gpsd if there is good documentation, I doubt there
were too many itrax03 users out there, but I wrote a driver for it
anyway. And I've bought a bunch of late-90's/early-2000's receivers
over the years to have devices to test with...

The bigger problem is that this doesn't seem to gratuitously emit PVT
status, and we don't have a framework in gpsd for doing polling.
Quality (*DOP) is available, you're right - V isn't. I think this
thing's firmware assumes that GPSDO users tend to not be moving.. If
you're feeling handy with a soldering iron you might be able to find
where the GPS chip connects to the MCU and throw a line buffer/driver
on to take a copy of the serial data. But that's kind of getting away
from just plugging it into gpsd and having it work.

On Tue, Nov 24, 2015 at 12:36 PM, Paul <address@hidden> wrote:
>
> Transcript of a minicom session with the device,
>
>  http://abelian.org/vlf/tmp/notes-57963.txt
>
> One of several Chinese sources on ebay,
>
>  http://www.ebay.com/itm/261997391557
>
> Most don't have the RS232 daughter board which is a Chinese
> add-on, not Trimble.   The 1PPS and 10MHz double oven xtal
> oscillator are useful for radio hobbies and these units are
> less than half the price of a Thunderbolt.
>
> Probably this GPS is too obscure, obsolete, and undocumented
> for it to be worth adding into gpsd.  Doesn't look like it
> gives V or any quality info.  All I need is the time so I'll
> just hack together something for that.
>
> --
> Paul Nicholson
> --
>



-- 
GDB has a 'break' feature; why doesn't it have 'fix' too?