By connecting multiple MFRC522 RFID readers to ... down to them. Her code allows you to configure the type and number of RFID cards required to trigger one of the Arduino’s digital pins ...

I just received my RC522 RFID reader and made this simple Arduino access control system that uses the reader, a buzzer for the alarm and a relay shield for the security system. The relay can be used ...

Patrick explains more about his latest hardware creation and its features : Meet the Arduino Compatible RFID Reader Module ... you’ll receive the Arduino code, so that you can modify ...

For starters, you need a pre-wired NFC RFID module as the key hardware. NFC and RFID projects have become a huge trend, but many modules are pricey for electronics hobbyists and need a complex setup.