Perfect for beginners and experienced makers looking to integrate RFID technology into their Arduino projects. This article was updated in May 2025, to ensure the code still works for all versions of ...

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The RC522 RFID reader is interfaced with Arduino using SPI protocol. The following circuit connections are made for interfacing the RFID reader with Arduino UNO.

In this tutorial, we are going to interface RDM6300 RFID Reader Module with Arduino Nano. The RDM6300 RFID Reader is one type of RFID module with a 125 kHz frequency.

Therefore, an effort was made to design a tool for “identification of impedance changes in metals using an Arduino Uno-based RFID RC522” which is relatively inexpensive and easy to carry.