Humidifier reports 0 temperature and humidity when offline
I added my humidifier (deerma.humidifier.jsqs) to homebridge via this plugin.
The problem is, when the humidifier is offline, the plugin would still report 0°C temperature and 0% humidity to HomeKit.

I tried manually removing all “environment” stuff from the js file, the extra accessories in the following screenshot would be removed. 
![IMG_0088](https://user-images.githubusercontent.com/2883335/163831565-e0d16912-dd82-41e5-bec7-fc5ab5378d4e.jpeg)

But the “Current Relative Humidity” attribute was still there (see below screenshot).
![IMG_0090](https://user-images.githubusercontent.com/2883335/163831890-fed6b555-858a-4f5a-bae0-18fec22b372a.jpeg)

This is not a huge deal, but kind of annoying. Especially when you ask Siri, she would say the temperature ranges from 0 to something.  I only use the device in winter, so it’s offline most of time through the year. 

Is it possible to avoid reporting data when the device is offline (maybe show it as no response), or completely disable the temperature and humidity sensors?

Thank you.
