I have a project car with EMU Black V3 and a 15-button keypad with rotary switches.
Currently, in the EMU Black V3 3.064 beta1 software, there isn’t yet an option for a 5x3 keypad with rotary switches, so it would be important to add one. 
Hi its there you have rgb 5x3 inside and than you have only to configure it in the two key settings