ELM command set

[bobo33]

I have got couple of the OBD-II adapters for Arduino, but I can not seem to use them with my own code.
What is the supported command set?
I try for example to use the ATMA command to monitor all traffic and extract, but the only response I am getting from the adapter is "OK". I have set all the other parameters and the sequence of commands used to initialize protocols, etc, is working fine on a generic bluetooth OBD adapter.

[stanley]

So other commands work well?

[haydent]

ATMA may not necessarily be supported with your car (or elm327) it doesnt work for me with them.