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Tracking / Autocross / HPDE / Drifting What these cars were built for! |
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02-18-2021, 03:35 AM | #15 |
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That's what I was asking about
Anyhow, WE DID IT! In RaceChrono format, the parameters are: Channel: Brake Position (%) OBD-II header: 0x7B0 PID: 0x2141 Equation: min(100, 1.1 * max(A-10, 0)) Explanation: the min/max trick makes sure the output is in the [0%, 100%] range. The 1.1x is a multiplier that roughly matches the scale factor I previously chose for my CAN bus reader so that 100% is reported when I'm braking really hard. The -10 offset is to compensate for the default value of 10 (I've no idea why the reported value never goes below 10). Enjoy! Having said that, OBD-II provides a much lower refresh rate than CAN, so I still recommend investing a little time into making a DIY CAN reader as documented on my GitHub: https://github.com/timurrrr/RaceChronoDiyBleDevice |
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02-18-2021, 04:41 AM | #16 | |
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To add on - the brake pressure PID visible in the app shows in two units: by MPa and by voltage. And in the voltage there is always a value (about 0.1v if I'm not mistaken) even when the brakes are untouched so it correlates back to your compensation. However the MPa value does go from 0 to 10 MPa - this is with me lead-footing the pedal |
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05-11-2022, 04:08 AM | #17 | |
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Developer guide: http://www.gps-laptimer.com/LapTimer...%20Program.pdf The input menu asks for
My best interpretation of the inputs that would work in HLT would be, with some feedback from the developer on a similar implementation [ http://forum.gps-laptimer.de/viewtopic.php?t=5589 ]:
Obviously, it doesn't have field to input a custom header like I'm used to seeing in applications like Torque (and RaceChrono). However, there is a way to specify a custom width for the parameter by adding leading zeroes. For example, specifying the PID as "41" allows it a width of 1 byte, but if we instead label it as 0041, it will be 2 bytes wide. Perhaps this is the way to incorporate the header? Last edited by EndlessAzure; 07-25-2022 at 01:51 AM. |
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05-12-2022, 03:48 AM | #18 | |
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If that doesn't work, you may want to ask on the HLT forum. I know how to enter the config in RaceChrono and what underlying messages are sent over the bus, but never tried HLT, so don't know what format it wants for the OBD PID or ECU CAN ID. Or you can try the superior CAN bus mode in RaceChrono
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