Used [ Ссылка ] to attach an old floppy keypad from Classic Roamer to Arduino.
[ Ссылка ]
Used a multimeter to detect which combination of pins were for which button - 25 buttons, 25 combinations. See:
‘Up Arrow’,’M’,’9’,’T’,’C’,
'Go','0','7','8','S',
‘Left Arrow’,’6’,’5’,’E’,’N’,
‘Right Arrow’,’W’,’S’,’R’,’P’,
‘Down Arrow’,’4’,’3’,’2’,’1
Used the script and uploaded. The connection is bad after desoldering the original connections but it worked!

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