Does anyone have experience with Smekitlly ZigBee Mini Temperature and Humidity Sensor?

I happen to have two of these sensors, and I would like to add them to me HE setup. They are Zigbee devices, so I should be able to make them work, right? They pair correctly, but then I just never get any data from them at all, it seems.

Thanks,
Markus

Update: I guess it just took a while but eventually all the gremlins worked themselves out. The next morning, everything seemed to work fine. The only thing is that they seem to be very slow in reporting changes. Sometimes they don't report anything for hours. I have even tried to take the sensors to other places where I know the temperature is very different (like taking them from the air conditioned inside out into the hot sunshine), but it just seems to be quite slow.

Markus

Some devices are like that.