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Add the real LUX value as option. (Formula added) #49

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Travelbacon opened this issue May 5, 2018 · 1 comment
Closed

Add the real LUX value as option. (Formula added) #49

Travelbacon opened this issue May 5, 2018 · 1 comment
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@Travelbacon
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Travelbacon commented May 5, 2018 •
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Just to discuss.

Brightness' lightLevel is now the INT16 defined by Philips to make Lux more understandable. Lux is in real life not a linear value. "Light level in 10000 log10 (lux) +1 measured by sensor. Logarithm scale used because the human eye adjusts to light levels and small changes at low lux levels are more noticeable than at high lux levels." HUE-API documentation of Philips.

Is it an option to create an extra output LUX or an extra node?
The formula is Math.pow(10, (INT16 - 1)/10000);
Or

lux = lightLevel - 1
lux = lux / 10000
lux = Math.pow(10, lux)

msg.payload = Math.round(lux)
return msg;

Before I create one and suggest as a pull, I rather discuss. :)
@Travelbacon Travelbacon changed the title Lux is not Lux but Philips Human Readbale value Add the real LUX value as option. (Formula added) May 5, 2018
Foddy pushed a commit that referenced this issue Jun 16, 2018
v1.5.6 updates
155e74b 
* New increment/decrement brightness setting in Hue Light and Hue Group nodes ([3a6977a](3a6977a))
* New real lux property to Hue Brightness event outputs ([thanks @Travelbacon](#49))
* Added colorTemp property to Hue Light event outputs ([f8d237d](f8d237d))
* Manipulation of the update interval setting to avoid API errors with many devices
* Fixed some annoying typos
* Dependency updates
@Foddy
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Foddy commented Jun 16, 2018

Thank you for this.
The output object is now extended with the lux property on all Hue Brightness nodes with v1.5.6

@Foddy Foddy closed this as completed Jun 16, 2018
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@Foddy @Travelbacon