Harry's GPS Suite Forum

I am using Andriod petrolhead current version. I am using a Nexus 7 w/ front camera, external ODBLink MX. Andriod 4.4.4 system.

When I select Drive now, Video, Record. I can see all the ODB II data on the live video display, it updates with a good resolution and response time. Now for the problem. When I overlay the video on the Nexus 7 the video looks fine but the ODB II data appears (static) at a point in time, but does not update, I may only see the data change in the overlay a couple times.

Any idea's to correct this will be appreciated.

In case an overlay doesn't look like it should, please always check if the data recorded is fine: Lap List - any lap - Data Recordings - Preview - Charts. In case that data shows good data for the whole lap, there is an issue in overlaying (please report). Usually data is not ok and dropped for some reason while driving.

Harry

Looks to be a well know problem with the Nexus 7 (2013) model GPS. I will need to use an external bluetooth GPS. I did test it on my one plus one and worked fine. Thanks for the response.

If your OBDII data ist stopping, how come you blame it on the GPS? How does the track map on the overlay look? If it looks fine it's not a GPS issue. You could also try and overlay that same lap with GPS data only (so only speed and track layout are visible). If you have no drops there, it's something with your OBDII connection / setup I guess.

901racer wrote:Looks to be a well know problem with the Nexus 7 (2013) model GPS. I will need to use an external bluetooth GPS. I did test it on my one plus one and worked fine. Thanks for the response.

Any pointer to this well known problem? Maybe I can tweak that thing?

- Harry

bulls23 wrote:If your OBDII data ist stopping, how come you blame it on the GPS? How does the track map on the overlay look? If it looks fine it's not a GPS issue. You could also try and overlay that same lap with GPS data only (so only speed and track layout are visible). If you have no drops there, it's something with your OBDII connection / setup I guess.

When GPS reception stops, OBD will not be stored either - so there is a possible relation.

- Harry

Even though it gets 8 or so satellites. Using GPS Status app it seems to lose a fix every 5 seconds or so then comes back very quickly. Everything I have seen on the GPS on the Nexus 7 2013 indicates it is a hardware problem that they have not been able to solve. It seems some applications are more sensitive to this than others.

Thanks

Maybe they are sending some proprietary NMEA sentence (the Nexus 4 does too) not matching the NMEA0183 format specs. You may try creating a log for this 5 second interruption following the "HOWTO Send trace logs" thread in Troubleshooting. Please make sure the effect happens while logging and select the GPS Sensor trace class only.

Harry