AES key 32 instead of 16 digits

[mikburnz]

I’m trying to integrate my multical 21 with your GitHub solution. I got the aes key from water provider. But it’s 32 figures instead of 16.

Is it possible to change the credentials.h from 16 to 32 or should I convert it (how)?

As I read I have to convert each figure to the hex format . Correct? Thanks in advance