Odometer value about elmduino HOT 6 OPEN

you'll have to code it yourself. Just copy one of the other PID functions, and replace the PID with 166. Something like this (I've not tested it):

uint8_t ELM327::odometer()
{
	return (uint8_t)processPID(SERVICE_01, 166, 1, 4, 0.1);

}

Note that it returns 4 bytes, and you need to divide the result by 10 (that's what the 0.1 scale factor is for)

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Hi Patrick,
thanks for your suggestion, I modified the library to also read the odometer value, but when compiling it returns the following error:
c:\Users\Administrator\Documents\Arduino\libraries\ELMDuino\src\ELMduino.cpp: In member function 'uint32_t ELM327::supportedPIDs_161_192()':
c:\Users\Administrator\Documents\Arduino\libraries\ELMDuino\src\ELMduino.cpp:2261:42: error: 'SUPPORTED_PIDS_161_192' was not declared in this scope
return (uint32_t)processPID(SERVICE_01, SUPPORTED_PIDS_161_192, 1, 4);
^~~~~~~~~~~~~~~~~~~~~~
c:\Users\Administrator\Documents\Arduino\libraries\ELMDuino\src\ELMduino.cpp:2261:42: note: suggested alternative: 'SUPPORTED_PIDS_61_80'
return (uint32_t)processPID(SERVICE_01, SUPPORTED_PIDS_161_192, 1, 4);
^~~~~~~~~~~~~~~~~~~~~~
SUPPORTED_PIDS_61_80
c:\Users\Administrator\Documents\Arduino\libraries\ELMDuino\src\ELMduino.cpp: In member function 'uint32_t ELM327::odometer()':
c:\Users\Administrator\Documents\Arduino\libraries\ELMDuino\src\ELMduino.cpp:2284:42: error: 'ODOMETER' was not declared in this scope
return (uint32_t)processPID(SERVICE_01, ODOMETER, 1, 4, 1.0 / 10.0);

this error is returned at compile time. The changes made on the two library files are:
`uint32_t supportedPIDs_161_192();

uint32_t odometer();`
these lines have been inserted in the elmduino.h file!

In the elmduino.cpp file i inserted:

uint32_t ELM327::supportedPIDs_161_192()
{
return (uint32_t)processPID(SERVICE_01, SUPPORTED_PIDS_161_192, 1, 4);
}

uint32_t ELM327::odometer()
{
return (uint32_t)processPID(SERVICE_01, ODOMETER, 1, 4, 1.0 / 10.0);
}

I'm sorry if I bother you for this triviality, but I can't understand the error and it is the last step of the project that is still missing.
Thank you.

Roberto.

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I wouldn't worry about the uint32_t supportedPIDs_161_192(), it's not needed, for the moment, lets just assume your vehicle supports reporting of odometer.

Also you've referenced ODOMETER when it hasn't been defined in the .h file. To start with, just hard code everything as per my example, if it works, then maybe it's worth defining ODOMETER constant etc. I assumed you knew you needed to add the function prototype to the class.

In the .h file where all the other functions are defined - it doesn't really matter where - but I suggest here

and paste in the original function I provided in the .cpp file.

that should be all you need to do.

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try turning debug on to see what your vehicle is reporting - this will be independent of your Nextion display.

have a look at the multiple PIDs example for how to turn debug on
https://github.com/PowerBroker2/ELMduino/blob/master/examples/multiple_pids/multiple_pids.ino

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