So I searched for some codes but all I found is about how to read some sectors and bits and blah blah.
The code for rewriting first writes something you want and then reads it. Soon I am going to a spa hotel and I want to read their cards's info stored (especially for my friends's cards in order to troll them :D) and then write it over my own card (which is now empty). How can I do this?
The device I am using- RFID RC522
- Uno R3