If anyone wants to beta test a version that supports temperature AND length measurements, here's a link: BETA VERSION WITH LENGTH SUPPORT
I think it's working fine, though I had to do some hacking to ensure backward compatibility and I could only test that once. If it happens to break an existing device for you, it should fix things if you delete the device and re-add.
Once I'm a little more confident in it I'll merge the branch and release the update for reals.