C125 Dash timing problem

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C125 Dash timing problem

Postby Jeremy on Wed Oct 27, 2021 2:54 pm

Can someone have a look at my c125 dash file, I can't get the live timing to work?
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JDP 78A Ver 2 v1.c125v64
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Re: C125 Dash timing problem

Postby Sean on Wed Oct 27, 2021 7:16 pm

Have you got a log file from the dash you can share? It would help with the diagnosing, to see at least if the GPS data is coming in from the M1 correctly.
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Re: C125 Dash timing problem

Postby SDean on Thu Oct 28, 2021 7:40 am

Hi,

When you receive the GPS data over CAN a special offset is needed, I have edited the attached config with the changes.
Attachments
JDP 78A Ver 2 v2.c125v64
(1.42 MiB) Downloaded 28 times
Stephen Dean
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Re: C125 Dash timing problem

Postby Jeremy on Thu Oct 28, 2021 6:40 pm

Thanks for the reply Sean.

I have attached the last log out dash using the config you edited.

The GPS data is coming in the wrong resolution, for example -3.3683595 where is should be -33.683595.
I attempted to change the resolution in your config file you uploaded, however it keeps going back to 7 decimal points.
Attachments
Screenshot 2021-10-28 193728.png
Screenshot 2021-10-28 193728.png (5.35 KiB) Viewed 1388 times
20211028-0348500.ld
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Re: C125 Dash timing problem

Postby SDean on Fri Oct 29, 2021 8:00 am

Hi,

Try this version, I missed that the divisor had been set to 10 instead of 1 in the original configuration.
Attachments
JDP 78A Ver 2 v4.c125v64
(1.42 MiB) Downloaded 23 times
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Re: C125 Dash timing problem

Postby Jeremy on Fri Oct 29, 2021 1:50 pm

Absolute gold Sean, the last config file worked. Lap timing is now functioning.

While I have you, are you able to cast your eyes over my M1 file, it has been setup for GPS ground speed traction control. I personally don't think it setup correctly.

GPS estimate, which I only recently learnt is only used when there is a fault with wheel speed.

Ideally (could be wrong) GPS Speed Translation should be used for ground speed with a condition of more than 6 or 7 satellites in use.

What do you think?
Last edited by Jeremy on Thu Nov 04, 2021 10:22 pm, edited 1 time in total.
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Re: C125 Dash timing problem

Postby SDean on Fri Oct 29, 2021 4:00 pm

Having done a fair bit of testing using GPS for the only Vehicle speed input, I would not use it for Traction or Launch Control operation. The update rate in transient conditions is just too slow for meaningful control.
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