The AN only reads the serial number of the card, then compares it with the local stored serial number, in case of a match it provides access.
If you want to also write a smartcard with a certain number, which is basically possible, get the protocol and implement it.
It would be easier to link the serial number of a smart card on a local device with a number given by you, stored in the local device's eeprom.
As well one can identify a certain card and link it to the 5-digits number, it will work only on this one local device.
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