i am working on my project with centrafuse i ahve buy a elm327 to have the obd ii work i install drivers then set port in centrafuse and choose the elm 327 too but it wont connect do i need to do something else?
Try setting the port speed to 34800. Also make sure "autostart" is on. restart Cf afteryou make the settings changes.
Mod - Driveline forum
If it's a knock-off ELM327 from China, 9600 might be the port speed to try.
Also, you probably want to confirm that the unit is installed correctly and the configuration is correct by trying a standalone ScanTool program.
At least, that's what I do.