[Ovmsdev] GPS theft alert

sharkcow sharkcow at gmx.de
Fri Feb 12 17:28:44 HKT 2021

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,


Am 09.02.21 um 18:40 schrieb Michael Balzer:
> 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:
>> 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:
>>> Hi all,
>>> > Twice in the last few weeks I've gotten the "possible theft/flatbed"
>>> 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
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> --
> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
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