How should I best implement a dimmer? - E1.20 RDM (Remote Device Management) Protocol Forums

ericthegeek · October 13th, 2009

Couple of things I notice:
The Sub-Device should report 12 sub-devices (Section 10.5.1 - Sub-Device Count).

I'd really rather see the sub-device have a footprint of zero and a starting address of 0xFFFF. (FFFF means not-supported). Otherwise the controller could think the devices needs 24 slots (12 for the root and 1 for each sub-device). Sounds like some controllers aren't happy with this though.

I've generally assumed that a device that supports Personalities also must support PERSONALITY_DESCRIPTION. It's not in the document, but it'd be hard for a controller to know what to do without it. Give the manufacturer a call, they can probably tell you what PIDs they require.

berntd · October 13th, 2009

Hi Eric,

I interpreted this by stating that stating that a subdevice has NO subdevices. Hence I report 0 for subdevices in the subdevice info. I just noticed that this is a WRONG assumption as p 59 states that this must alwasy report the subdevice count.
My mistake!

In my opinion, personalities can and should function without a description by simply showing them as the personality number.

The spec does not seem to mandate that DMX_PERSONALITY_DESCRIPTION must be supported if DMX_PERSONALITY is supported.

Perhaps we need to clarify this further?

Kind regards
Bernt

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October 13th, 2009	#1
ericthegeek Task Group Member Join Date: Aug 2008 Posts: 390	Couple of things I notice: The Sub-Device should report 12 sub-devices (Section 10.5.1 - Sub-Device Count). I'd really rather see the sub-device have a footprint of zero and a starting address of 0xFFFF. (FFFF means not-supported). Otherwise the controller could think the devices needs 24 slots (12 for the root and 1 for each sub-device). Sounds like some controllers aren't happy with this though. I've generally assumed that a device that supports Personalities also must support PERSONALITY_DESCRIPTION. It's not in the document, but it'd be hard for a controller to know what to do without it. Give the manufacturer a call, they can probably tell you what PIDs they require.

October 13th, 2009	#2
berntd Senior Member Join Date: Jan 2008 Posts: 102	Hi Eric, I interpreted this by stating that stating that a subdevice has NO subdevices. Hence I report 0 for subdevices in the subdevice info. I just noticed that this is a WRONG assumption as p 59 states that this must alwasy report the subdevice count. My mistake! In my opinion, personalities can and should function without a description by simply showing them as the personality number. The spec does not seem to mandate that DMX_PERSONALITY_DESCRIPTION must be supported if DMX_PERSONALITY is supported. Perhaps we need to clarify this further? Kind regards Bernt