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Door control system: Difference between revisions

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=== Cards that don't work as well ===
=== Cards that don't work as well ===
* Contactless bank cards have more processing power on-board, and need quite a lot of RF energy to activate, so may not work as reliably as simpler cards like Oyster card or simple keyfobs. This is a known problem, that might be resolved by including a DC boost converter in the reader enclosure to make sure the reader gets a good 5V supply.
* Contactless bank cards have more processing power on-board, and need quite a lot of RF energy to activate, so may not work as reliably as simpler cards like Oyster card or simple keyfobs. We have refitted all readers known to have problems activating bank cards with more reliable readers. Don't worry, we don't have the decryption keys to do anything banking related with your bank card, we just read the serial number, not the number printed on the front.
* Passports with RFID chips will not work, and by attempting to use them will reset some internal read count in the passport, which may raise questions at border crossings.
* Passports with RFID chips will not work, and by attempting to use them will reset some internal read count in the passport, which may raise questions at border crossings.


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