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Besides the GPS lock we've got some additional GPS detail:<br>
<ul>
<li> Receiver mode (v.p.gpsmode)<br>
</li>
<li>Satellite count (v.p.satcount)<br>
</li>
<li>HDOP (v.p.gpshdop)<br>
</li>
<li>GPS speed (v.p.gpsspeed)<br>
</li>
</ul>
Maybe these can help. I've added them to the L record and added a
log output on flatbed alerts so we can see what they provide
generally and during a false alert.<br>
<br>
Note: on Teslas we copy the car GPS data so we may need special
handling there.<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div class="moz-cite-prefix">Am 12.02.21 um 12:36 schrieb Chris van
der Meijden:<br>
</div>
<blockquote type="cite"
cite="mid:1613129771.2578.7.camel@arachnon.de">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div>Just a side information.</div>
<div><br>
</div>
<div>On Andorid phones it can take 10 minutes to find the
satelites if the time of the phone and the satelites is out of
sync. And in that case the position can also be a few 100 meters
off track. As soon as the times are in sync the GPS signal is
immediately there and the position is correct.</div>
<div><br>
</div>
<div>Regards</div>
<div><br>
</div>
<div>Chris</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>Am Freitag, den 12.02.2021, 12:24 +0100 schrieb sharkcow:</div>
<blockquote type="cite">
<pre>OK, in my case OVMS lost the GPS fix for one log entry, then apparently
my car took a 400m dive! Strange theft approach... ;-)
Took about 10mins. for GPS to be back in the correct position.
So, would we want to implement a workaround? Maybe wait with the alert
after fix is lost? But then again, if the car really is towed, I'd like
to know asap...
Thanks,
sharkcow
Am 12.02.21 um 10:35 schrieb Michael Balzer:
<blockquote type="cite">
Please check your "L" log at the time of the alert: what did your GPS
data look like just before the alert?
There's the option of raising the alert threshold. It's 500 meters by
default (config vehicle flatbed.alarmdistance). But we should first
determine the cause of the false alerts.
Regards,
Michael
Am 12.02.21 um 10:28 schrieb sharkcow:
<blockquote type="cite">
I got the theft alert again last night, the car had been standing for
several hours... so at least in my case I would think the alert trigger
is too sensitive compared to the resolution/accuracy of the GPS
measurement.
Best regards,
sharkcow
Am 09.02.21 um 18:40 schrieb Michael Balzer:
<blockquote type="cite">
I found the reason for the false theft/flatbed alert in my case by
checking my telemetry archive: the car lost GPS on the road. Coordinates
were stale when I parked the car. The stale coordinates were taken as
the initial park coordinates, causing an alert when the GPS receiver
delivered the next valid data (the actual park position).
So the bad antenna placement actually was the cause in my case, but we
can solve that in software.
I've just pushed a fix (untested) for this, consisting of a) making the
location module aware of parking coordinate staleness and b) lowering
the staleness thresholds for the GPS metrics to 10 seconds.
Please verify.
Regards,
Michael
Am 09.02.21 um 10:29 schrieb Michael Balzer:
<blockquote type="cite">
I had the alert once with my Mii, also shortly after parking. With the
module being mounted with the GPS antenna placed under the hood, I
assumed that to be the cause.
I doubt it, but I'll check if any of our changes could have had an
impact on the GPS movement detection.
Regarding open changes to be included in 3.2.016: sharkcow is
currently working on finishing the UpMiiGo TPMS feature, it's already
been tested so we'll wait for that.
Regards,
Michael
Am 09.02.21 um 09:57 schrieb sharkcow:
<blockquote type="cite">
Hi all,
<blockquote type="cite">
Twice in the last few weeks I've gotten the "possible theft/flatbed"
</blockquote>
alert just as I was backing out of the garage. I have never received
that alert before. I hadn't posted anything yet because I was
waiting to
drive the other car and see if has the same problem.
I get this too every once in a while with my e-Up. Mostly shortly
after
parking, I think (and tragically, the one time I'd have needed it
because I actually _did_ get towed, I had crashed OVMS into a boot
loop
just before :-/).
sharkcow
</blockquote>
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</pre>
</blockquote>
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<pre class="moz-signature" cols="72">--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26</pre>
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