I’m new here and i just start working on arduino
But i’ve an issue on my code.
I’ve got a string looking like : “154-test-test-456-0000”
and i need to convert it to a Hex (done) and i need to convert it again to a byte.
I need it because i’m writing this string into a NFC/RFID card on block but the function i use, expect a byte.
But i don’t know how to do that