Problem in reading cards using MFRC522

Using Arduino Networking, Protocols, and Devices
#1

Hello ,

I am using RC522 module and using library MFRC522 when I tried to read any card except the card with

the module can't detect these cards , just detecting the cards with the module so what is the problem in

this case .and how to control the card access with time limit and date .

Thanks,

#2

eng_ibrahim_comm2012:
Hello ,

I am using RC522 module and using library MFRC522 when I tried to read any card except the card with

the module can't detect these cards , just detecting the cards with the module so what is the problem in

this case .and how to control the card access with time limit and date .

Thanks,

Your problem appears to be related to the design of the other cards. Are they all designed to work at Operating frequency: 13.56MHz?

Paul

#3

Hello Paul ,

I don't know what is the operating frequency of the other cards , can you please told me how to detect the card frequency ?

thanks,

#4