Email question about Arduino keyboard matrix code :
I tried to use your Matrix key on Arduino Leonardo 6x6 matrix with keyboard press and failed. Also tried to modify another matrix (keypad.h ones) and couldn't send keyboard press, only serial and txt files.
The code should work fine with a Leonardo. In fact, that was my intended use. (I just haven’t gotten to it yet.)
If you post the code you’re using, I might be a to help.