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Author Topic: Zigbee question  (Read 360 times)

Offline Domoworking

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Zigbee question
« on: December 10, 2018, 05:57:14 pm »
I went on Wikipedia to read more about zigbee.
I was not a le to understand in a celar way if different application profile (ha and ll) share exactly The dame hardware and protocol frequencies.
In other words, with a proper firmware, would a VeraPlus unit be able to connect a Hue Light?

Offline HSD99

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Re: Zigbee question
« Reply #1 on: December 10, 2018, 06:34:08 pm »
The ZIgbee physical layer (the radio) is based on the IEEE 802.15.4 physical layer (PHY) and media access control (MAC) for low-power, low-data rate personal area networks. Zigbee builds the higher-layer protocols needed for for the specific application/network layer.  Most Zigbee radios operate in the 2.4 Ghz band ISM band, but there are some that operate at lower frequencies in specialized areas and applications.

The difficulties come with the higher-layers. There are several "profiles" for home automation (HA 1.2, and upcoming HA 1.3), as well as for lighting control, smart energy, and others.  These profiles provide a basic framework, and may not be completely compatible or interchangeable. Zigbee devices end up being more difficult to support as a specific device will likely require more specialized firmware development. And, much as in Z-Wave, some devices don't do a good job of following the specification.

Assuming the 802.15.4 physical layer is compatible (correct frequency) the issue then becomes software, both in the hub and the device. Vera's Zigbee hardware should be able to support 2.4 GHz devices but there will need to be some specialized software.  If you search the forum, for example, you'll find examples of Zigbee devices that Vera can turn ON and OFF, but don't support color control or other advanced features.


Offline kigmatzomat

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Re: Zigbee question
« Reply #2 on: December 10, 2018, 10:40:48 pm »
The thing about ZigBee is that there are flavors of ZigBee and some of the flavors have generations.

Right now the most common Zigbees are ZigBee HA 1.2 (home automation) and ZigBee LL (Light Link). LL does lighting, HA does locks, sensors, thermostats, alarms, and lighting. They are network compatible but not command compatible. E.g. the command for "light=on" is different between the two. So an HA controller doesnt know the commands for a LL device, and vice versa.

Vera supports ZigBee HA, Hue bulbs are ZigBee LL. So, no way for Vera to run Hue.

Unless both migrate to ZigBee 3, which is supposed to blend both LL and HA into one ginormous, somewhat redundant, standard. Vera would probably support ZigBee 3 at some point. I would be surprised if Hue would migrate as they have been very protective of their Hue ecosystem.

Oh and there are other Zigbees than LL, HA and 3. There is a home power meter ZigBee, several industrial manufacturing zigbees, and I believe Control4 uses their own ZigBee.

Offline Domoworking

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Re: Zigbee question
« Reply #3 on: December 11, 2018, 06:08:16 pm »
Philips hue already supports zigbee 3.0 https://www2.meethue.com/it-it/supporto/note-di-rilascio/bridge
And new Hue devices should support it too.