I have a few different motion and presence sensors that are not correctly reporting the light levels, or not as I’d like them to anyway.
I have two different models for the Aqara motion sensor, a few Philips Hue motion sensors and a Tuya presence sensor.
In the device list in Z2M, I am going into the Settings (specific) tab, and then either increasing or decreasing the lux calibration values.
However, it doesn’t seem to matter what I put into this column, the reported lux level on the sensor never changes…
What I would expect is that if the lux level on the sensor reads 0 and I then set the Illuminance lux calibration to say 15, that the sensor would then read 15. Is this not how this works?
I’m trying to adjust the Aqara GZCGQ11LM with this setting. There’s some dim light around but it reports 0 lux, which is wrong because 0 would be pitch black.
Since the setting is a percentual offset I interpret it as yielding (1 + offset / 100) × sensor value. Ie, if you calibrate with 50 and the sensor is detecting 100 lux, it’ll end up giving 150 lux; or if the calibration is -50 it’ll result in 50.
Today I tested with calibration 10 and it didn’t seem to have any noticeable effect. Will see tomorrow with 50. Have to wait until the morning when the light changes fast because the sensor is outside.
Thank you @odwide because of your explanation, I understood the input of the calibration values. May I come back to the topic and ask a question?
I have the Hue Motion sensors (indoor) and they show me 0 lux too quickly if it still has a certain brightness for my finding. I mean, for me, 0 is in absolute darkness. So I thought the calibration could help. However, I now have values in calibration, of 100000. And still 0 lux is displayed too quickly.
Could it be that the sensor simply measures too inaccurately and if 0 lux is measured, the calibration is no longer of any use, since X% x 0 lux = 0?
And is there a solution to influence this lower threshold?
That’s the problem most likely. When the sensor value is 0 the threshold will be of no use. My sensor does the same as yours, it registers 0 but there’s still some light around. Only solution is to get an accurate sensor.
