New Hardware Interfaces

New to the community and cannot wait to do some projects. I am really appreciating the example hardwareInterfaces that come with the install and am currently writing my own for the services I have. I am wondering if there are other undocumented interfaces or collections people have that would be shareable?

I’ve got some. For example a rotary encoder for the pi and one for kodi.

Don’t know if you’ve found it already but here is some documentation: