I have one of these in my master bathroom (with 5 other Z-Wave Plus devices) and it's working well on batteries. The problem is that the default humidity report is at a 10% change (according to the Aeotec docs). That's way too slow to turn on the fan in a timely manner. (Usually after I've already left the bathroom.) Will changing Parameter 42 (0x2A) to between 2 - 5 cause the device to report more quickly? Normally the humidity is stable. (The log is showing reports every 2-5 hours.) Only running the shower brings it up.
Or is the problem that the device only reports hourly and needs USB power to report in a more timely manner?
(I've found and installed the "Basic Z-Wave tool" driver and practiced with it on a dimmer so I'm confident I can change the Parameter.)