Made a custom RGB macro keypad for development. Combined it with my scripts for controlling my Android dev device

Coding chalenge.
So... Spent almost two hours to put this little device to work with the keypad.
The device is a arduino micro, special one that can work as mouse /keyboard or any kind of input on most devices (pc, Android phone,...)
The objective is to make a macro keypad to:
- Fast insert text
- Play sounds in games over voice chat.

Think of it like this, you start a new html file, press one key and all the base code is inserted.

So... Why so long? Tought was the hardware, tought the keypad could be set differently that most, code mistakes...

My error was all here, masked from the debugger by a if:

char keys[ROWS][COLS] = {
{'1','2','3','4'},
{'5','6','7','8'},
{'9','10','11','12'},
{'13','14','15','16'}
};

Easy to figure right? Only saw it after reading all the code twice.