I was poking around in my devices today and came across something that made me say huh?? In my bedroom, I have a Zooz ZSE11 and Hue indoor morion sensor. When I went into each, the Zooz had an illuminance value of 22, while the Hue had 50, in the same room. Do they use different methods to calculate the value? This is not affecting anything, I'm simply curious as to why the difference. Eventually that hue sensor will be replaced with another Zooz (either ZSE11 or ZSE 18).
Yes. Illuminance is measured quite differently among the different brands. Largely, I think this has to do with the luminance sensors in the devices, some like Hue seem to use Sensors with a large range, while others use presumably cheaper sensors that report smaller ranges.
S.
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Most likely, the Hue will be replaced by a ZSE18. Clearly, I don't need two sensors with illuminance capability in the same room (and the ZE18's are cheaper). In this instance it just sort of happened. I just use the reading of one for the rule. This was just a casual observation. At the time I put the ZSE11 in I was replacing an Aqara p1 motion sensor as that was the least reliable of the two. This is all part of a broader plan to eliminate most or all Zigbee, I've just never had good results with Zigbee stuff.
This happens all the time.
Put two temp or humidity sensors next to each other, they won’t report identical values for either parameter either.
All sensors have a margin of error in the measurements they take. Particularly inexpensive sensors intended for use in home automation devices.
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