[Ovmsdev] GPS location glitch (flatbed theft false alert)

Sun Feb 28 15:57:02 HKT 2021

Maybe we could switch the alert trigger to be "GPS speed valid and > x 
while vehicle off / vehicle speed < y". Teslas don't provide the GPS 
speed, but for all modem GPS users that could be more reliable.

The GPS speed could peak on a jump, but that should be easily detectable 
as an invalid speed. We also could use a smoothed value.

@all: to provide data on this, you need to set the log level for 
"location" to verbose:

config set log level.location verbose

"CheckTheft" log messages will then be created for any location change 
for more than 10m while parking.

Regards,
Michael

Am 27.02.21 um 22:53 schrieb Michael Balzer:
> Heiko,
>
> that log excerpt was sufficient to now be sure we cannot do anything 
> about these false alerts. You can only raise your alert threshold.
>
> This happened: your GPS location suddenly went off by 200m, stayed 
> there for a minute, then jumped to a position off by 900m, stayed at 
> that point for another minute, then went back to the original park 
> position.
>
> …
> 2021-02-21 15:55:09.668 CET I (288729388) ovms-server-v2: Send MP-0 
> L48.987923,12.216290,0,338.2,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 15:55:30.658 CET I (288750378) ovms-server-v2: Send MP-0 
> L48.987923,12.216290,0,338.4,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 15:56:12.668 CET I (288792388) ovms-server-v2: Send MP-0 
> L48.987923,12.216291,0,338.5,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 15:56:33.668 CET I (288813388) ovms-server-v2: Send MP-0 
> L48.987923,12.216291,0,338.6,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 15:56:54.668 CET I (288834378) ovms-server-v2: Send MP-0 
> L48.987923,12.216292,0,338.6,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 15:57:15.658 CET I (288855378) ovms-server-v2: Send MP-0 
> L48.987923,12.216292,0,338.7,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 15:57:57.678 CET I (288897388) ovms-server-v2: Send MP-0 
> L48.987923,12.216292,0,338.7,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 15:58:52.688 CET I (288952398) ovms-server-v2: Send MP-0 
> L*48.987923,12.216293*,0,338.8,0,0,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
>
> 2021-02-21 15:59:09.668 CET I (288969378) ovms-server-v2: Send MP-0 
> L*48.986771,12.213362*,310.5,72,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,6,1.4,0.0
> *→ first jump to 200m distance*
> 2021-02-21 15:59:13.678 CET I (288973388) ovms-server-v2: Send MP-0 
> L48.986782,12.213336,310.5,68,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,4,1.8,0.7
> 2021-02-21 15:59:34.668 CET I (288994388) ovms-server-v2: Send MP-0 
> L48.986874,12.213301,0,62.4,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,4,1.8,0.0
> 2021-02-21 15:59:55.668 CET I (289015388) ovms-server-v2: Send MP-0 
> L48.986874,12.213300,0,63.8,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,5,1.6,0.0
>
> 2021-02-21 16:00:24.378 CET W (289044098) location: CheckTheft: 
> flatbed.moved @*48.994774,12.209670* gpsmode=AN satcount=5 hdop=1.9 
> gpsspeed=0.0
> *→ second jump to 906m distance → alert*
> 2021-02-21 16:00:24.658 CET I (289044378) ovms-server-v2: Send MP-0 
> L48.994774,12.209670,316.9,1925.6,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,5,1.9,0.0
> 2021-02-21 16:00:37.668 CET I (289057388) ovms-server-v2: Send MP-0 
> L48.994671,12.209748,316.9,1908.4,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,5,1.9,0.0
> 2021-02-21 16:00:58.668 CET I (289078388) ovms-server-v2: Send MP-0 
> L48.994465,12.209938,124.1,1876.5,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,6,1.3,1.1
> 2021-02-21 16:01:19.668 CET I (289099388) ovms-server-v2: Send MP-0 
> L48.994236,12.210092,124.1,1831.4,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,6,1.3,0.0
>
> 2021-02-21 16:01:43.658 CET I (289123378) ovms-server-v2: Send MP-0 
> L*48.987961,12.216274*,124.1,345.1,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AA,9,1.2,0.0
> *→ back to park position*
> 2021-02-21 16:01:53.658 CET I (289133378) ovms-server-v2: Send MP-0 
> L48.987968,12.216249,124.1,346.3,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 16:02:01.668 CET I (289141388) ovms-server-v2: Send MP-0 
> L48.987972,12.216249,124.1,346.4,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 16:02:22.668 CET I (289162388) ovms-server-v2: Send MP-0 
> L48.987972,12.216251,124.1,346.7,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 16:02:43.668 CET I (289183388) ovms-server-v2: Send MP-0 
> L48.987972,12.216255,124.1,347,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 16:03:04.668 CET I (289204388) ovms-server-v2: Send MP-0 
> L48.987972,12.216256,124.1,347,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> 2021-02-21 16:03:25.668 CET I (289225388) ovms-server-v2: Send MP-0 
> L48.987972,12.216257,124.1,347,1,1,0.0,30,0,0.000,0.951,0.053,0,0,AN,8,0.9,0.0
> …
>
>
> Satellite count went down during that episode from 8 to 4, but the fix 
> wasn't lost and the HDOP was still excellent. 4 satellites normally 
> are sufficient for a good position, also when the alert occured, a 
> fifth satellite already had been locked.
>
> IOW, that looked exactly like an actual flatbed theft would have looked.
>
> The only thing you can do is raise your theft alert threshold to, say, 
> 1000m. Or higher if these GPS jumps go beyond 1000m.
>
> It seems this is a glitch in the SIM5360 GPS receiver.
>
> Regards,
> Michael
>
>
> Am 27.02.21 um 19:57 schrieb sharkcow:
>> Ah, thanks for the tip (I had that on in the beginning but could'nt make
>> much of the logs so I'd turned it off meanwhile :-/)
>>
>> Here's a bit more log info.
>>
>>
>> Am 27.02.21 um 17:57 schrieb Michael Balzer:
>>> Heiko,
>>>
>>> off-topic, but that's why I provide the email export feature on my
>>> server. Simply tick the checkbox and set your desired export time, and
>>> the server will send you a full data export zipped once per day.
>>>
>>> That way you can always go gack in time to any point.
>>>
>>> Your log excerpt was a bit too narrowed down, please show a few more
>>> messages with the "location" tag around the alert.
>>>
>>> Regards,
>>> Michael
>>>
>>>
>>> Am 27.02.21 um 17:41 schrieb sharkcow:
>>>> I got one false theft alert a few days back, but it seems the server
>>>> logs aren't saved that long... :(
>>>>
>>>> relevant lines of console log attached.
>>>>
>>>> sharkcow
>>>>
>>>>
>>>> Am 27.02.21 um 16:47 schrieb Michael Balzer:
>>>>> As the other thread got off-topic: I'd still like to get forward
>>>>> regarding release 3.2.016.
>>>>>
>>>>> We identified three open issues:
>>>>>
>>>>>  1. VW e-Up sometimes stays awake for 4-5 hours.
>>>>>  2. Wifi AP connection is unstable with some devices.
>>>>>  3. More frequent location flatbed theft false alerts.
>>>>>
>>>>> My current status on these is:
>>>>>
>>>>>  1. …is probably not a bug on the OVMS but rather a real behaviour of
>>>>>     the e-Up performing an extended 12V trickle charge.
>>>>>  2. …has only been reported by Steve Davies and seems (?) to have 
>>>>> been
>>>>>     solved by the default scan timings – Steve?
>>>>>  3. …seems to be a Heisenbug, i.e. hasn't had any reports since we 
>>>>> added
>>>>>     extended logging.
>>>>>
>>>>> Is my status correct? If so, I think these should no longer stop 
>>>>> us from
>>>>> releasing 3.2.016.
>>>>>
>>>>> Regards,
>>>>> Michael
>>>>>
>>>>> -- 
>>>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> OvmsDev mailing list
>>>>> OvmsDev at lists.openvehicles.com
>>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>
>>>>
>>>> _______________________________________________
>>>> OvmsDev mailing list
>>>> 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
>>>
>>>
>>> _______________________________________________
>>> OvmsDev mailing list
>>> OvmsDev at lists.openvehicles.com
>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>
>>
>> _______________________________________________
>> OvmsDev mailing list
>> 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
>
> _______________________________________________
> OvmsDev mailing list
> 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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