PID = SUPPORTED_PARAMTERS / PARAMTER_DESCRIPTION question

[mike_k]

I've seen quite a few products that replies with the minimum required set of PIDs included in the list, so even if responders are not supposed to do so the controllers should be able to handle all cases when subsets of the required PIDs are included or not.

[berntd]

Hello all,

Thanks for this. Those are the exact issues I have come up with here.

If DMX_START_ADDRESS is supported (because the device needs it then how is a controller supposed to know this unless it can detect it with the PARAMTER PIDs?

I would have to agree with Scott in that it should be treated as a NON mandatory pid and thus included in the SUPPORTED_PARAMTER -list.


Then again, one could argue that if the device does
not need DMX_START_ADDRESS, it should respond with a nack reason NR_UNKNOWN_PID.
The controller could then make a conclusion from that, in which case Peter's approach will work too.

Hmm...

Kind regards
Bernt