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To low a voc limit for the Aqara TVOC sensor #1092
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I don't have the Aqara VOC sensor. Support was added by @sieren in #1020. To my understanding the Aqara TVOC sensor reports VOC level (in ppb). deCONZ exposes this as Note that Eve doesn't show VOC Density; it only shows the Air Quality (from 1 to 5 stars, where 5 stars corresponds to numeric value 1). Eve shows VOC level (in ppb) in the history; the Eve app translates the density into level. I think this is because the gen-1 Eve Room reports VOC level, using an Eve-defined characteristic VOC Level (well before Apple defined VOC Density).
This message makes no sense: the characteristic name should be
Indeed, Apple defines VOC Level as a FLOAT with values between 0 and 1,000, see: https://github.com/homebridge/HAP-NodeJS/blob/178bd7a6d707d258109be932f2e0055f9a3048f6/src/lib/definitions/CharacteristicDefinitions.ts#L4837-L4855.
No, that's the limit for VOC level, not for VOC density. The density is 4.57 times the level (assuming an air temperature of 20°C), see simont77/fakegato-history#107. Looking at the history for my 3rd-gen Eve Room, I see VOC level values as high as 6,896 ppb. I didn't catch the corresponding density in Home, but these values could well be above 30,000 µg/m³. It wouldn't be the first time that Apple uses ridiculous default limits (e.g. the minimum value for Current Temperature is 0°C), but accessories are allowed to override these. |
Hi - thanks for the comments. In Apply HomeKit - Aqara TVOC In Homebridge status: In deCONZ GUI: In Aqara display: |
Not much to add to what @ebaauw has said. The conversion formula is documented in simont77/fakegato-history#107 as referenced before. Edit: thanks @ebaauw , i see u already changed it |
Overall I have to add that history support is still broken because stuff is missing on the deCONZ side of things for reporting changed values. |
Hi @sieren [10/02/2022, 18:59:50] [Hue] Aqara TVOC: set homekit Air Quality from 1304voc to 1145voc |
And that's much appreciated, especially since I don't have the device, and cannot see for myself.
Also interesting... The air quality has no unit, certainly not Volts. Probably a copy/paste error on my part.
Because the Apple-defined default makes no sense, but wasn't changed. |
It's just a warning, not an error. Safe to ignore I'd say. |
But that means that we will never get higher values than 1000 µg/m³ = 219 ppb As values higher are at the moment set to these values as they exceeds the maximum Also, will an Eve Room have the same limit (1000 µg/m³ ) in Apple HomeKit ? |
Of course not. As I said: the problem is with the default maximum that Apple defined. This can be overwritten by an accessory, which is what the commit above does. |
Sorry for all my questions So could there be a fix, so the Aqara TVOC also overwrites the default maximum ? |
Yes. The fix has already been made in d9dea8a. It will be included in the next release of Homebridge Hue. |
Hi That sounds super. Thanks a lot for your time and you plugin. I am a donator. |
Hi Again Is this the the properties in the next release: |
Yes, it is. |
In v0.13.38. |
Issue
To low a limit for the voc value for the Aqara TVOC sensor.
I think the limit should be 10000 like also in the "Panko deconz release" where DDF Aqara air quality TVOC raised unhealthy max value to 10000
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