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KNX in openHAB 2 / Smarthome [message #1403497]

Thu, 24 July 2014 07:58

Karel Goderis

Messages: 198
Registered: March 2014

Senior Member

Kai,

Could you outline how you would see KNX in an OH 2/ ESH contellation?
e.g would a KNX Actor be a Thing, and the Group Objects would become Channels?
I can not imagine that we have to virtualise every possible KNX actor in code, so, based on that / current syntax of binding:thingtypeid:thingid:channelid you would end up with something like knx:groupaddress:x/y/z:value whereby the KNX GA is the thingid, and "value" the channel

How will we define things like RollerShutters, where depending on the KNX DPT, a different Type can be (optionally) supported? How to will "main" GA and "listening" GA be dealt with? Would all of this be dealt with in the Channel definitions?

K

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Re: KNX in openHAB 2 / Smarthome [message #1403607 is a reply to message #1403497]

Thu, 24 July 2014 14:57

Kai Kreuzer

Messages: 673
Registered: December 2011

Senior Member

I do not want to go into the details of a possible new KNX binding here, but it of course makes sense to check whether this can fit into the general architecture.

> would a KNX Actor be a Thing, and the Group Objects would become Channels?
Yes.

> How will we define things like RollerShutters, where depending on the KNX DPT, a different Type can be (optionally) supported?
A rough idea was to introduce "profiles" on item-channel-links, which describe the behaviour of the link - this could then result in using different DPTs

> How to will "main" GA and "listening" GA be dealt with?
This would be probably different channels on the same item with different profiles ("standard" vs. "just-listening")

Regards,
Kai

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Re: KNX in openHAB 2 / Smarthome [message #1403611 is a reply to message #1403607]

Thu, 24 July 2014 15:04

Karel Goderis

Messages: 198
Registered: March 2014

Senior Member

Interesting. So, in those profiles we could then equally define transformation services a la MAP, REGEX and so on?

It would certainly overcome the confusion that currently exists on the "direction" of some items in some bindings.

Another idea would be to define filters or wildcards in those profiles, only allowing for values that match a given expression or alike.

K

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Re: KNX in openHAB 2 / Smarthome [message #1403958 is a reply to message #1403611]

Mon, 28 July 2014 17:41

Kai Kreuzer

Messages: 673
Registered: December 2011

Senior Member

I am not yet clear about the best design of these profiles and whether they should themselves be configurable or just a fixed, neatly defined set of behaviours. Maybe both makes sense, to have a standard set that can be easily supported within UIs and then custom complex behaviour for solutions that require it.

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