Hi,
Just one thing, they are supposed to be difficult to pair with a ST V2 Hub and can disconnect from time to time.
EDIT: a safer bet for more money is the IRIS motion/temp sensor that you can use for both capabilities in my smartapps:
https://www.amazon.com/Iris-Smart-Home-Management-3326-L1/dp/B01GCKAF6K/ref=sr_1_1?ie=UTF8&qid=1494502383&sr=8-1&keywords=iris+motion+sensor
Regards.