Arduino Rotary Encoders
Only arduino pro micro have Gamepad native support, if you want to get it recognized as a controller within the game, make sure to use arduino pro micro. Otherwise only SimHub will see inputs
On nano avoid A6, A7 as they don't have digital capability. And D13 due to arduino on board led
Other boards pin support may vary.
Matrix wiring is intended for momentary switches, you cant use toggle switches (non momentary) Take care some cheap buttons easily burns do not heat them too much when soldering.
Buttons can be used in simhub for any arduino board, or be seen as Gamepad for arduino micro (when enabling the option)