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michaelahern / homebridge-airthings

A Homebridge plugin for Airthings air quality monitors via the Airthings Consumer API.
ISC License
38 stars 6 forks source link

Wrong sensor values #18

Closed Windewigg closed 2 years ago

Windewigg commented 2 years ago

Hi there! Great plugin, thanks a lot. I am running a View Plus. The detailed sensor values are being read out correctly, as shown in the log: {"battery":100,"co2":739,"humidity":57,"pm1":6,"pm25":6,"pressure":958.4,"radonShortTermAvg":15,"temp":22.8,"time":...,"voc":181,"relayDeviceType":"hub"} I have understood, that HomeKit limits the type of values that can be displayed, so radon cannot be displayed, right? But the values themselves are also displayed wrong, e. g. "VOC Density" is shown to be "550" (incorrect) though the read out value is "181" (correct) (see log above). Do I have to do any corrections in the configuration or do you have an idea what's wrong. Thanks in advance!

ninjas28 commented 2 years ago

They're different units, the Airthings measures VOC density in parts per billion and Homekit wants values in micrograms per cubic metre.

michaelahern commented 2 years ago

Yep, exactly. The default HomeKit characteristic expects micrograms per cubic meter. I've added a custom secondary characteristic to show VOC in pub in the latest version (v0.7). It won't display in the Apple Home app, but will be visible in some third-party HomeKit apps.

Also check out the latest version and readme for details on new Radon support in the latest version..