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Kiwi3 OBD dropping data during recording?

Posted: Mon Oct 29, 2018 12:46 am
by anthonymckay
This has been an ongoing issue with me. When I use my Kiwi3 with my iPhone 7+ and the latest version of HLT, OBD data from the Kiwi3 seems to drops intermittently throughout the lap. You can see a demonstration of this in my video from a track day last month below. Running this setup from a 2012 Lamborghini LP570 Superleggera. Any ideas of how I can deal with this?

https://www.youtube.com/watch?v=5D_Te3NTyig

Re: Kiwi3 OBD dropping data during recording?

Posted: Sat Nov 03, 2018 12:25 pm
by Harry
There are two expert settings you can test for cars not fully compatible:

1) Expert Settings ‣ OBD Tweaks ‣ Adaptive Timing ‣ Enabled (instead of Optimized)
2) Expert Settings ‣ OBD Tweaks ‣ ECUs Addresses ‣ ECM instead of ALL

Late LapTimer versions turn on a number of optimizations to get better update rates. This may result in the named problems.

- Harry

Re: Kiwi3 OBD dropping data during recording?

Posted: Fri Jan 18, 2019 6:38 pm
by T4nkcommander
Update: Changing parallel requests seems to have fixed my issue (alongside making sure the phone won't connect to the truck's infotainment system too).

I'm having this exact same issue, although with more uptime in between drops, with my OBDLink MX and Lemur Bluedriver. Ensuring my phone is disconnected from my truck helps, but does not eradicate the problem. Both adapter apps work fine, never dropping data, so the issue is with HLT.

I'm playing around in expert settings with the options Harry recommends, and hopefully will find something that works. Otherwise, going to have to see if I can record OBD data with another app and overlay it manually afterwards.

Re: Kiwi3 OBD dropping data during recording?

Posted: Sun Jan 27, 2019 7:39 am
by LIGISTX
Harry wrote:
Sat Nov 03, 2018 12:25 pm
There are two expert settings you can test for cars not fully compatible:

1) Expert Settings ‣ OBD Tweaks ‣ Adaptive Timing ‣ Enabled (instead of Optimized)
2) Expert Settings ‣ OBD Tweaks ‣ ECUs Addresses ‣ ECM instead of ALL

Late LapTimer versions turn on a number of optimizations to get better update rates. This may result in the named problems.

- Harry
I have a similar issue on a 2012 Mustang. I am using the TonWon OBD II, and it seems like it drops out intermittently. Don't mind the video exposure, the manual meeting decided not to work, stupid GoPro's...

https://youtu.be/CvkedpbqanI

Harry, would the same settings help here as well? This was my first time trying the app, and besides the video being horrible (which is my fault) it seems great! Just need to get the OBD II data working more correctly.

Thanks!

Re: Kiwi3 OBD dropping data during recording?

Posted: Mon Jan 28, 2019 3:37 pm
by Harry
The second settings is always a good idea to set. Only in case you miss some channels after restricting ECUs (to ECM), one should use ALL.
In case you still get drop outs, please create a log as described in the FAQ (Debugging OBD Connections).

- Harry

Re: Kiwi3 OBD dropping data during recording?

Posted: Wed Feb 06, 2019 3:12 am
by T4nkcommander
LIGISTX wrote:
Sun Jan 27, 2019 7:39 am
Harry wrote:
Sat Nov 03, 2018 12:25 pm
There are two expert settings you can test for cars not fully compatible:

1) Expert Settings ‣ OBD Tweaks ‣ Adaptive Timing ‣ Enabled (instead of Optimized)
2) Expert Settings ‣ OBD Tweaks ‣ ECUs Addresses ‣ ECM instead of ALL

Late LapTimer versions turn on a number of optimizations to get better update rates. This may result in the named problems.

- Harry
I have a similar issue on a 2012 Mustang. I am using the TonWon OBD II, and it seems like it drops out intermittently. Don't mind the video exposure, the manual meeting decided not to work, stupid GoPro's...

https://youtu.be/CvkedpbqanI

Harry, would the same settings help here as well? This was my first time trying the app, and besides the video being horrible (which is my fault) it seems great! Just need to get the OBD II data working more correctly.

Thanks!
Don't forget disable parallel requests. If that still doesn't solve your issue, try reinstalling. Had to do so for a different issue and so far my OBD connection is working much better.

Re: Kiwi3 OBD dropping data during recording?

Posted: Wed Feb 06, 2019 8:50 am
by Harry
I know that reinstalling software is popular since MS Windows has been introduced. For LapTimer it simply means all settings the user has changed are reverted to default settings, and any laps recorded and not backuped externally are lost.

Harry

Re: Kiwi3 OBD dropping data during recording?

Posted: Fri Feb 08, 2019 4:11 am
by LIGISTX
Awesome, thanks for the info! I will hopefully have another event in a few weeks and will give these settings a try!

Re: Kiwi3 OBD dropping data during recording?

Posted: Sat Apr 13, 2019 4:02 am
by sleepy
I had the same issue, with engine RPM readout dropping to 0 frequently. Kiwi3 and iPhone 5s / SE.

In addition to the settings suggested above, the real culprit in my case was the video preview. I had a habit of checking video preview and just left it there, and when the recording started (either automatically or manually), OBD data would drop like crazy.

Now I close the video preview before HLT starts recording, and everything seems to work just fine. So just throwing this out there in case people are still having this issue.

HLT v22.1.4 / iPhone SE iOS 12.1.4 / Kiwi3

Re: Kiwi3 OBD dropping data during recording?

Posted: Sat Apr 20, 2019 5:16 pm
by MX-5_4_NOS
Interesting. I can second this. I also had problems with OBD update rate and I frequently used the preview screen to record videos. In timer screen without preview OBD works much more stable. Thanks a lot.