User interface solutions
I doubt there are any standards for this. The reason is that 'hardware' solutions are very much more flexible than PC solutions (which by default have a keyboard, mouse and monitor) and not much more.

Hardware solutions on the other hand can have any kind of different displayed, touch screen, sensors of all kinds, leds/lights, hardware/mc controlled motors, relays, communication means etc. 

The only user interface solutions are probably the libraries which can be used for some hardware, e.g. display driver drivers, led drivers, sensor libraries etc.

Especially to combine multiple hardware items (like on a PC the mouse, keyboard and monitor) gives a user interface 'experience'. Since hardware solutions have many more different hardware options, there is not a clear 'solution' for combining so many different hardware.