homepage Forums Technology Flight Sim Pit Builders MMJoy/MMjoy2 - Set your own USB controller with a cheap Arduino

This is issue of (obsolete) Windows Game Controllers.

Because you have changed some parameters in the device (Arduino) in another computer, e.g. number of axes and or buttons, VIP/PID and or device name.

In Windows Register remains the old reference, then the error in Game Controllers > Properties. So delete in Windows Register for old controller name references, can search by name or VID/PID before plug.

But for VKB Button Tester (included in MMJoy1 package) or games controls, the controller is fully operational.