[Ovmsdev] GPS theft alert

[Michael Balzer]

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:
> 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:
>> 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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>>> OvmsDev at lists.openvehicles.com
>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>
>> -- 
>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>
>>
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>>
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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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