Read out from OBD-II Freematic Emulator using ELM327 with USB and LabView

Hello. I have an Freematic OBD-II mk2 emulator which simulates diagnostics of a real car. I have connected an ELM327 diagnostic device with USB cable to the emulator and a PC. The connection between emulator, diagnostic device and computer works. Now I need to read out parameters in LabView. How do I do it? I tried to use the NI VISA functions, but didn't manage to read out anything sensible. How can I for example read out Engine RPM? Do you have some example code?
I want to avoid using Automotive Diagnostic Command Set, because it's to expensive for me.

Oh yes, I didn't realize what this hardware does. Some beginners think that a DB9 is a standard interface for a CAN bus, and when they see the DB9 serial port on their computer they think they can just use that. I was worried this was what you were attempting.
So yes VISA is the right way to go. Once you have this device installed and recognized in Windows it should appear as a COM port. You can open the Windows Device Manager and by plugging and unplugging your device you should see a COM port appear and disappear.
Assuming you do launch LabVIEW and go to the example finder and search for Simple Serial. This is an example VI that can send serial data to a COM port, wait, then read the response. It can basically work like hyperterminal. Assuming there are no already made LabVIEW drivers (I haven't seen any) this will be a good place to start. Using documentation on your hardware you can start to come up with commands to do things like read and write CAN data, by sending the appropriate commands to the hardware over serial.
http://www.elmelectronics.com/obdic.html
Depending on what you want to do it might be a decent amount of work. Of course if you do get anything good and working feel free to post your progress here so others can benefit.
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Read out from OBD-II Freematic Emulator using ELM327 with USB and LabView

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