PLX Kiwi 4

Discussion related to external OBD and other sensors
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Squared
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Re: PLX Kiwi 4

Post by Squared » Mon Oct 26, 2020 9:44 am

Hi Harry,
I eventually achieved about 3 to 5 Hz with my iPhone. I am now trying to get the iPad running with the OBDLink. I have identical settings on both devices but I can barely sustain 1Hz on the.iPad.
Is there any iPad specific issue you are aware of?
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Dave
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Harry
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Re: PLX Kiwi 4

Post by Harry » Mon Oct 26, 2020 12:09 pm

No, I'm not aware of a difference. If any, there may be a slightly different BT bandwidth / latency, but this should not make such a difference. For a CAN bus, 1 Hz signals an error and not a generally low performance of components involved. Have you checked all your OBD Tweak settings? You can create a Contact mail from both your phone and the iPad and check for difference in Settings.log. This file lists all settings changed from default values.

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Re: PLX Kiwi 4

Post by Squared » Mon Oct 26, 2020 5:26 pm

HLT crashes when I try to create the contact email on the iPad. Works ok on iPhone. I’ll check settings manually again.
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Re: PLX Kiwi 4

Post by Harry » Mon Oct 26, 2020 5:36 pm

Squared wrote:
Mon Oct 26, 2020 5:26 pm
HLT crashes when I try to create the contact email on the iPad. Works ok on iPhone. I’ll check settings manually again.
Yes, there are a number of problem with iPads and iOS14. Will be fixed soon. I forgot that in my last post :-(

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Re: PLX Kiwi 4

Post by Squared » Wed Oct 28, 2020 2:52 am

iPad settings identical to iPhone. Only difference is that I’m using external dual gps with iPad but not with phone...
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Re: PLX Kiwi 4

Post by Harry » Wed Oct 28, 2020 8:53 am

Squared wrote:
Wed Oct 28, 2020 2:52 am
iPad settings identical to iPhone. Only difference is that I’m using external dual gps with iPad but not with phone...
And what happens when not connecting the XGPS?
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Re: PLX Kiwi 4

Post by Squared » Wed Oct 28, 2020 7:54 pm

I will check and run a log with and without gps
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Re: PLX Kiwi 4

Post by Squared » Thu Nov 05, 2020 7:17 am

HI Harry,
Without any changes to settings I found that I am now getting about 5 Hz PID rate on the iPad which is good enough for me. However, when I connected the GPS, the rate dropped to about 1-2 Hz.
I did not get the logs yet. I’m having trouble getting the same performance out for GPS Buddy even though I think all the settings are the same. It would be really handy to have a little script to copy the settings from HLT in to Buddy. Alternatively, enable logging on HLT.
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Re: PLX Kiwi 4

Post by Harry » Thu Nov 05, 2020 7:46 am

Sounds like a bandwidth problem - which is unexpected for a Kiwi + XGPS. The rate may go up when driving because LapTimer will stop scanning for other devices once a higher speed is detected. Scanning requires bandwidth too.

I add the settings thing to the feature requests list.

Logging is disabled for production versions of LapTimer because it adds a performance penalty even when disabled. Only beta versions have it enabled. I’d rather not change this due to the advantages the solution has.

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