BYD Tang 2024 (international) custom profile: Error reading LV_V

[dsantos21]

Hi! I created a vehicle profile for the BYD Tang 2024 and, after many rounds of trial and error, I managed to build the attached profile (vehicle_profiles_byd_tan.json). It would be awesome to have this profile merged into WiCAN profiles!

For some reason the LV_V PID is shown incorrectly in WiCAN Pro (I’m checking using wicanpro_ip/autopid_data). If I copy all the settings from my custom vehicle profile into the custom PID (same PID, INIT, expression), it works (screenshot attached).

What could be the problem? At one point I had entered a wrong setting (not in this PID) that made AutoPID crash. After some fixes and more testing, all PIDs are now shown in AutoPID and it seems there are no more crashes. At some point I even thought that WiCAN could be skipping a HEADER change (INIT), but if that was the case I'd have more errors...

I'm now using firmware WiCAN Pro v4.45p.

Thank you for the amazing project!

PS: I even tried a factory reset and re-entered all settings manually, but nothing changed.
PS2: Could someone else with a BYD Tang try my profile and report back? :-D

[meatpiHQ]

@dsantos21 Great work! Can you please post the car scanner app logs? Make sure that you select the vehicle make and model in car scanner. The logs will help us understand what's going on.

[dsantos21]

@meatpiHQ for sure! I've also attached my spreadsheet (BYD Tang - PIDs - Car Scanner.xlsx) so you can see the other sensors' raw data, which may be useful to others. In the attached log (log.txt), I only recorded the 12V battery voltage (13.7 in Car Scanner).

One side note: After disconnecting Car Scanner (using BLE), all data collection in WiCAN Pro (autopid_data/dashboard) was incorrect until after a reboot. I believe WiCAN Pro is not reinitializing the car after another app possibly changes some CAN settings. I tried it a few times, and it happened every time.

Thanks for your help!