Hi Marcel, My sentence was not clear, sorry. I was not criticizing the unit test process, I really do want it also, instead of blindly using the api. It's just finding out proper raw messages to test against. I found one command that has one nested attribute, but I also would like to get some more complicated ones as this api will be used in every places in our code. It's more time consuming and less fun than writing the api itself ;) (and yes I am using iwmon hopefully) Tomasz