Problem Reading various things with ELMduino

Projects Programming
1

Lets just start with the simple one. Reading from a GM vehicle, pulling speed (doesnt matter if kmh or mph).

  case SPEED:
    speed = myELM327.mph();
    if (myELM327.nb_rx_state == ELM_SUCCESS)
    {
       Serial.printf("Speed (MPH): %.1f\n", speed);
      obd_state = IDLE;
    }
    else if (myELM327.nb_rx_state != ELM_GETTING_MSG)
    {
      myELM327.printError();
      obd_state = IDLE;
    }

The defined value for the speed OBD2 lookup is below which is correct. I've pulled it on my own using without a library using 410D and I can pull speed without this library.

const uint8_t VEHICLE_SPEED                    = 13;  // 0x0D - km/h

For some reason this just doesnt work.

If I use a OBD2 hardware simulator which connects to an ELM327 everything works fine. Is it a protocol issue or? I can read RPM and battery voltage (its off with this library) though.

Should I just ditch this and use my own code?

2

lot's of not commonly known abbreviations and special terms.

Too less information

  • no links to detail information,
  • no complete sketch.

This way of posting establishs a filter that only those users that are real experts to "ELM"
will answer

3

Yea its more geared towards individuals who have done this vs people who guess.

I'll need to find the non blocking example I'm playing with and post a link to it.

4

nevermind... it was my code.

5

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.