The basic idea is to have a microswitch activation within my DIY controller to be recognized as a control switch input in games like flight simulator or racing games.
I would like to use this unit as a plug and play device. Simpler the better!
Depends on how complicated you want to go. Is it enough to just send keystrokes according to button presses? If that’s the case just a HID-compatible microcontroller would be enough:
If you want it to appear as a joystick or gamepad, things get complicated fast. Have a read of the two guides below for an idea of how difficult it’s gonna be to implement this: