Source code for my button box with an Arduino Pro Micro

The button box constis of a button matrix with 3 rows and 4 buttons per row.

The first row contains 4 rotary encoders wih push funcion.

Each push button simulates two buttons - one for short press and the other for long press.

so button numbers are

 1,  2,  3,  4
 5,  6,  7,  8
 9, 10, 11, 12

and some extra virtual buttons for long button presses

13, 14, 15, 16
17, 18, 19, 20
21, 22, 23, 24

followed by buttons for the rotaries

25, 26, 27, 28
29, 30, 31, 32

where these buttons are

• rotary 1 left, right
• rotary 2 left, right
• rotary 3 left, right
• rotary 4 left, right

original code: https://github.com/AM-STUDIO/32-FUNCTION-BUTTON-BOX

For build instructions see also amstudios video: https://www.youtube.com/watch?v=Z7Sc4MJ8RPM

You have to install this library in Arduino IDE: https://github.com/MHeironimus/ArduinoJoystickLibrary

To install Keypad.h see also https://forum.arduino.cc/index.php?topic=511429.0

For PS4 and XBox compatibility it seems that using Keyboard.h is better than Joystick.h https://forums.codemasters.com/topic/41266-f-yeahdiy-button-box-ps4-done-and-working/

For platformio you can define dependencies in platformio.ini

lib_deps =
  mheironimus/Joystick
  chris--a/Keypad
  mathertel/RotaryEncoder