I would like to read information from a RFID card. I do not need the UID but I want to store text (UTF-8) on the RFID and the Arduino needs to read and do something with the stored information. I know I need to convert the HEX to UTF-8, but I just want the raw HEX buffer.
Background info: I would like to use an esp8266 with the RC522 to get the wifi-credentials. This way it is much easier to connect the esp8266 with the right network.
The RC522 will be used to enter the gym. Connected to a Raspberry Pi with database.