Reading RFID tags with RC522 module

Using Arduino Programming Questions
#1

Hi!

I'm having an issue using the 522 rfid reader module.

The thing is that I have a classic RFID 13.56 reader that works only as a keyboard emulator that it types in a 2736734546 (eg). I tried a varity of Examples from the 522 library but I it always get a different combination of letters and numbers (never the same one as my other readers). Eg. 6E645C79

Do you know how could I get the 2736734546 form out of the Arduino?

Also, I would like to know if it could get to work as keyboard emualtor. I have an Arduino Mega but I heard this feature was only available for Leonardo and other types (not for Uno or Mega). Is this true?

Thanks in advance!

#2

Is the RFID 13.56 device outputting a decimal representation of a tag number and the 522 rfid device outputs a hexadecimal representation? Use an online calculator to check.

The Leonardo and the Pro Micro use an Atmega32u4 chip and can be used for keyboard emulation.

#3

Thanks for your reply!

I'd checked that before but I couldn't get a coincidence.

The classic reader prints: 2036098158 (hex: 795C646E)

RC522 module prints: 6E645C79 (decimal: 1852071033)

Any ideas of how could I transform any of these to the other?

Thanks!

#4

nicoacosta8:
Thanks for your reply!

I'd checked that before but I couldn't get a coincidence.

The classic reader prints: 2036098158 (hex: 795C646E)

RC522 module prints: 6E645C79 (decimal: 1852071033)

Any ideas of how could I transform any of these to the other?

Thanks!

Well, I do see some similarities:

6E.64.5C.79 is a byte level reversal of 79.5C.64.6E

Maybe that helps you to get further.

#5