Forum › MIFARE general topics and applications › How can I achieve 1 time or 2 time use logic? › Reply To: How can I achieve 1 time or 2 time use logic?
Hi NTMS,
I do not know the system and infrastructure of your system. What I want to explain in my previous post is: if all reader stations are connected with a central server, the management is located at the server and the application on the card is used for verifying, here you have only a read from the card. But if all reader terminals are independent, you have to write the timestamp for the user and maybe for the companion to the card. It must be checked if the user wants to enter again. If you deal with writes you have to ensure the write operation of the timestamp is terminated properly and no “tear down” occurs.
Always bear in mind: the simpler a system, the less error prone and easier to maintain it is.
The MIFARE Team
I do not know the system and infrastructure of your system. What I want to explain in my previous post is: if all reader stations are connected with a central server, the management is located at the server and the application on the card is used for verifying, here you have only a read from the card. But if all reader terminals are independent, you have to write the timestamp for the user and maybe for the companion to the card. It must be checked if the user wants to enter again. If you deal with writes you have to ensure the write operation of the timestamp is terminated properly and no “tear down” occurs.
Always bear in mind: the simpler a system, the less error prone and easier to maintain it is.
The MIFARE Team
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