Humidity Sensor for Basement

[bobbles]

I'm using the Xiaomi ones.
Cheap and seem to work well for me.
You will need a custom Device Handler for it.

EDIT:

[Deprecated] Xiaomi / Aqara ZigBee device drivers (possibly may no longer be maintained)

NOTE: Although many users have had great success using them, Xiaomi / Aqara ZigBee devices are NOT officially supported or guaranteed to work on the Hubitat Elevation platform. I am maintaining a collection Xiaomi device drivers for Hubitat in a GitHub repository, at veeceeoh/xiaomi-hubitat. These device drivers are based on the bspranger/Xioami repository of device handlers for SmartThings, but with significant modifications and improvements for use only on the Hubitat Elevation hub platform. …