It looks like the only reason I can't get the WM100 to work with my older tablet is due to the native QR reader to the app. If I could manually input the string, I'd bet it would work.
Other QR readers work on the tablet, which is how I downloaded the app in the first place.
BTW, look for Com.leconoit.wm100.
My device isn't rooted, so I'm having trouble accessing that data.