[Ovmsdev] GPS quits?

[Michael Balzer]

Steve,

a) did you pick an active GPS antenna? I.e. one with a voltage on the 
label. The module can barely get a signal with passive antennas.

b) If you restart the modem, wait for "State: PoweredOff" before 
starting it again.

c) You can monitor the NMEA sentences by setting log level verbose gsm-nmea.

d) Not getting PPP as well may point to a general modem issue, maybe 
also log gsm-mux & simcom to check for that.

Regards,
Michael


Am 12.01.21 um 11:05 schrieb Steve Davies:
> Hi,
>
> I'm finding the OVMS GPS really unreliable.
>
> For instance, here are the current "v.p." values from my OVMS.
>
> I'm apparently going 88 km/h on the highway notwithstanding that my 
> car is parked at my house:
>
>     v.p.acceleration
>     v.p.altitude       9.7m
>     v.p.direction        347.5°
>     v.p.gpshdop        1
>     v.p.gpslock        yes
>     v.p.gpsmode        AN
>     v.p.gpsspeed       88.3404km/h
>     v.p.latitude       -34.0584
>     v.p.location
>     v.p.longitude        18.4477
>     v.p.odometer       15053km
>     v.p.satcount       9
>     v.p.speed        0km/h
>     v.p.trip       22km
>     xi3.v.p.tripconsumption        125Wh/km
>     xi3.v.p.wheel1_speed       0km/h
>     xi3.v.p.wheel2_speed       0km/h
>     xi3.v.p.wheel3_speed       0km/h
>     xi3.v.p.wheel4_speed       0km/h
>     xi3.v.p.wheel_speed        0km/h
>
>
> Earlier when I went out the GPS position got similarly stuck and only 
> recovered when I power cycled the OVMS.
>
> simcom status:
>
>     OVMS# simcom status
>     Network Registration: RegisteredHome
>     Provider: VodaCom-SA
>     Signal: -99 dBm
>
>     State: NetMode
>
>     PPP: Connected on channel: #2
>
>     GPS: Connected on channel: #1
>
>
> I turned the modem off with the gui and then turned it on.  Result of 
> doing that was it did not get a PPP connection after some minutes, and 
> the GPS did not connect.
>
> I tried this twice with the same result.  Position is still the old 
> one as above, no 3G PPP connection and no GPS connection.
>
> My GPS antenna is currently on the dashboard - could it be overheating 
> in the sun there? - it is probably pretty warm.  (But my car is 
> currently under shade since I got home)
>
> I now went and power cycled the OVMS and the SIMCOM connected 
> successfully, GPS connected, and has the correct position:
>
> OVMS# metrics list v.p.
> v.p.acceleration
> v.p.altitude                             5.2m
> v.p.direction                            0°
> v.p.gpshdop                              1
> v.p.gpslock                              yes
> v.p.gpsmode                              AA
> v.p.gpsspeed                             0km/h
> v.p.latitude                             -34.0XXX
> v.p.location                             Home
> v.p.longitude                            18.4XXX
> v.p.odometer                             15053km
> v.p.satcount                             9
> v.p.speed                                0km/h
> v.p.trip                                 22km
> xi3.v.p.tripconsumption                  125Wh/km
> xi3.v.p.wheel1_speed                     0km/h
> xi3.v.p.wheel2_speed                     0km/h
> xi3.v.p.wheel3_speed                     0km/h
> xi3.v.p.wheel4_speed                     0km/h
> xi3.v.p.wheel_speed                      0km/h
>
> I'm running with the ABRP script - is it possible that this is 
> impacting the reliability?
>
> Otherwise I'm looking for ideas...
>
> Thanks,
> Steve
>
>
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> OvmsDev at lists.openvehicles.com
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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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