Freematics Forum

Hello All,

I have a question on if the following error is expected behaviour...

Code was cloned from https://github.com/stanleyhuangyc/Freem ... datalogger.
Vehicle: Dodge Grand Caravan 2015 SXT

When I add the PIDs PID_ENGINE_TORQUE_DEMANDED and/or PID_ENGINE_TORQUE_PERCENTAGE application causes a panic and Freematics One+ reboots...

here is the Code change:
PID_POLLING_INFO obdData[]= {
{PID_SPEED, 1},
{PID_RPM, 1},
{PID_THROTTLE, 1},
{PID_ENGINE_LOAD, 1},
{PID_FUEL_PRESSURE, 1},
{PID_RUNTIME, 1},
{PID_ETHANOL_FUEL, 1},
{PID_ENGINE_OIL_TEMP, 1},
//{PID_ENGINE_TORQUE_DEMANDED, 1}, <-- When un-commented the panic occurs
//{PID_ENGINE_TORQUE_PERCENTAGE, 1}, <-- When un-commented the panic occurs
{PID_FUEL_PRESSURE, 2},
{PID_TIMING_ADVANCE, 2},
{PID_COOLANT_TEMP, 3},
{PID_INTAKE_TEMP, 3},

};

Here is the console output:

Rebooting...
ESP32 240MHz 16MB Flash
MEMS...9-DOF OK
ACC Bias:-0.12/-0.00/0.88
SD...30618MB
OBD...OK
VIN...<removed>
/DATA/22.CSV
File: /DATA/23.CSV
Guru Meditation Error: Core 1 panic'ed (StoreProhibited)
. Exception was unhandled.
Register dump:
PC : 0x400dfc81 PS : 0x00060d30 A0 : 0x800df949 A1 : 0x3ffca810
A2 : 0x00000000 A3 : 0x00000000 A4 : 0x00000000 A5 : 0x00002710

Again is the expected behaviour?

Seconds question I guess is how do i find out what PID's are supported by my vehicle?

Thank you all for your time. I look forward to replies.

David.

OK, I think i figured it out. I was looking at and using the OBD.h file as a reference however it seems that I should have been using the logdata.h as a reverence. The logdata.h file did not have an entry for the PID_ENGINE_TORQUE_DEMANDED and PID_ENGINE_TORQUE_PERCENTAGE, so the likely cause of the error is because there was no value assigned to a definition. I have updated my logdata.h file and will be compiling and testing again in the next few days. If there are no more posts from me then adding

#define PID_ENGINE_TORQUE_DEMANDED 0x161
#define PID_ENGINE_TORQUE_ACTUAL 0x162

to the logdata.h file solved my issue.

Cheers!

That did not solve my problem. Back to the drawing board

Hi,

the PIDs are already defined in the file Freematics/libraries/FreematicsPlus/utility/OBD.h

Also look at the hex values, according to the file it seems you have to skip the mode number

#define PID_ENGINE_TORQUE_DEMANDED 0x61
#define PID_ENGINE_TORQUE_PERCENTAGE 0x62

rgds
rosch

@rosch - Thanks for the input I will have to try this out as I am just coming back to trying to develop something on the One+.