VingCard Classic RFID – ASSA ABLOY International Options

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The RFID-RC522 module comes with eight pins (of which seven pins are used in this tutorial). In the following, the pin structure is proven as recommended by the documentation of the MFRC522 library (used later within the programming part). The RFID-RC522 module runs with 3.3V. Therefore, the module’s 3.3V pin should be linked to the Arduino’s 3.3V. The module may get broken, whether it is accidentally connected to the Arduino’s 5V pin. The whole pin layout is proven by the next table (works only for the Arduino Uno! Mega, Nano and many others. have totally different advisable pin layouts!):

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