Are you using it with the extra wired sensors, or just the internal ones?
This is a real PITA device because it dynamically changes the number of endpoints it exposes depending on whether it has the external wired sensors attached or not.
It also uses a weird implementation of Z-Wave Command Classes, for example for Configuration and Association the commands have to be encapsulated and sent to each specific endpoint individually.
If you're just using it without the extra wired sensors, then one of the built in generic Z-Wave drivers may work as in that case it's "just" a single endpoint device with temperature and humidity.