[Warner306]

I don't think I understand. You can't assign functions to buttons after adding a device. Harmony does it automatically?

You can convert any device command to a Kodi command with a keyboard.xml. A keyboard command could be assigned to open a specific window in Kodi, for example. A keyboard command could be assigned to anything. But I'm not sure if that is your problem. You want a single device to automatically populate all of the buttons? The Kodi device might be the closest, but it probably wouldn't populate the buttons shown.