Add support for 'On/Off plug-in unit' in hue binding

[tobiaswegner]

This patch adds support for hue devices that offer only on/off switching, no dimming. They deliver no brightness information so without this change, an exception is thrown. The patch returns 0 or 254 based on the "on" state of the hue device.

[kaikreuzer]

@tobiaswegner Just out of curiosity: What hue devices are there that aren't dimmable?

[tobiaswegner]

Plug adapters like this http://www.busch-jaeger-katalog.de/6710-0-0004,artikel.html or wall mounted actuators like http://www.busch-jaeger-katalog.de/6710-0-0002,artikel.html that are connected e.g. to your multimedia system instead of a lamp.
I think even with the genuine Philips plug adapter http://www.philips.de/c-p/6916531PH/livingwhites-adapter dimming can be disabled via a mechanical switch if dimming makes no sense with the particular load.

[kaikreuzer]

Ah, cool, I didn't know the Busch Jäger products yet! But 120 EUR for a smart plug? They should revisit their price list...

I think even with the genuine Philips plug adapter http://www.philips.de/c-p/6916531PH/livingwhites-adapter dimming can be disabled

You are right, I am actually using quite some of them (but never tried out the switch mode and how that behaves).

[tobiaswegner]

Ah, cool, I didn't know the Busch Jäger products yet! But 120 EUR for a smart plug? They should revisit their price list...

Yes, they are only a few weeks old. They price is as expected from Busch-Jaeger, but at least it is noticeable lower than the KNX Powernet devices. Anyway, I agree, it is no bargain buy.

[teichsta]

Thanks @tobiaswegner! Is that functionality already implemented in the ESH version of the binding? I know it's a rewrite but it might be worth having into that code. Would you mind @tobiaswegner checking double checking the ESH code?