[Ovmsdev] Strange issues with Car GPS accuracy.

[Michael Geddes]

Latest: I changed the startup vehicle to None and turned off the mobile.
Still getting drifting vehicle GPS until I unplug the OVMS.  Hardware
issue? Does anybody have any clues?

Michael

On Sun, 21 May 2023, 11:41 am Michael Geddes, <frog at bunyip.wheelycreek.net>
wrote:

> Hi all,
> I'm having a bunch of weird things going on which seem correlated to
> having the OVMS running.  I'm not convinced of causation yet.
>
> My car's Nav system is drifting out majorly (like by >100m) and then seems
> to stay out.  This causes major distractions as the nav system keeps giving
> me warnings about going down one-way roads and it makes the navigation
> 'interesting' to use.
>
> I also noticed that Android Auto location was frozen in one place, so I
> assumed this was coming from the car - or meant to be anyway.  I reduced
> the polling rate (new work I'm doing) slightly and this freezing no longer
> happens. (To 3 speed queries per second).  But the drifting out on the
> Navigation  still happens... but then not on AA!? Very very weird.
>
> If I unplug the OVMS from the OBD port (as I'm driving) it seems to (but
> not immediately - after a minute or so) correct itself.  It's hard to
> confirm this is directly resulting .. but it seems to be?
>
> I turned off my ECU2OBD which should mean that it is resorting to 1 per
> second POLL with a low throttle value.  I'll run with some logs to make
> sure this is what is happening.. but it still seems that this hasn't
> stopped this issue from happening.
>
> I've tried turning the GSM power off. No result.
>
> Another note: I seem to have stopped getting anything near regular updates
> from the OVMS GPS. Every now and again it gets a successful change come
> through.  Still working on diagnosing that.. maybe it's related?
>
>
> Any thoughts / help would be useful.
>
> //.ichael
>
>
>
>
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