I have two of these in my setup. One is located well under the roof of my front porch - this unit works flawlessly at all times. I have not had a problem with it since I installed it.
The other one is on my patio, concealed under an over hang, but not as well protected as the front porch unit is. I have noticed that when it rains, this sensor will freeze up - giving just a MOTION reading, it won’t flip back to no motion. It also stops reporting temp, lux, etc. After a few days (I assume after it drys out) it will start working again. Sometimes for a while, it will actually report motion as opposite - reporting MOTION when there is no motion, and NO MOTION while I’m standing in front of it waving my arms, only to flip back to MOTION after I walk into the house.
I was under the impression that these were outdoor sensors … I verified that I installed correctly (with the open area towards the bottom). I really don’t have a way to completely cover the patio sensor. Can these be exposed to the elements? Or do I need to start thinking about modifying a small bird house to keep the patio sensor better protected from the elements?