johnwasser:
Oh, so the products from http://www.emartee.com/You will find documentation (such as it is) on that site.
Yep, that is just what I'm talking about. That is as uninformative as can be for a newbie. Information varies from fair to none depending on the board. Code examples are few. Many are manufactured by others. maybe THEY should provide more information. I have two of the "switch brick V2", one works, one does not. From inspecting the board back lit with a bright light, it's not clear how it is working.
Jim