Suggestions for Custom OBDII Software

[rvicta]

I'm currently writing software to work with the mOByDic 2600 Plus interface by Ozen Elektronik (sold in the US by Digimoto) and I'm looking for suggestions of features that people would like to have available. At the moment, I'm focusing on reading data from the ECU, not modifying it. First suggestion I received from someone else is the ability to tell the scanner that at a given DTC to clear the CEL.

If anyone else is interested in writing software for this interface and would like information on technical details of communicating with it, please feel free to contact me.

[curtis73]

I was always interested in not only the interpreted signal, but the actual values as well. Like instead of just seeing "44 mph" from the VSS, I thought it would be neat (as well as help diagnose stuff) if you saw the actual values being reported by those sensors as well.

[rvicta]

Originally Posted by curtis73

I was always interested in not only the interpreted signal, but the actual values as well. Like instead of just seeing "44 mph" from the VSS, I thought it would be neat (as well as help diagnose stuff) if you saw the actual values being reported by those sensors as well.

First you have to determine if the value returned from the interface you're using is in hexadecimal or decimal. If it's hexadecimal then you would have to convert it to decimal to make sense out of it. Most of the interfaces require you to handle the stripping of header and trailer bytes to get at the data. The one I use only gives the data so you don't have to worry about the extra bytes. Anyway, this stuff is pretty cool to work with.

[curtis73]

I understand the hexadecimal vs. decimal, but you lost me at header and trailer bytes. Can you educate me on that?