Have ever tested this code with CLRC663 ?

[nitinGangurde]

I want to test your library with CLRC663.

[iwanders]

I have not tested it with that chip, I developed it against the MFRC630 as the readme says, but if I remember correctly, the CLRC663 has the same registers? So it likely works or can work with minimal modifications. Do report back with your findings!