I just received my RC522 RFID reader and made this simple Arduino access ... The resetAlarm integer is the Arduino pin where we connect the button that is used the reset the alarm. The relay is ...

By connecting multiple MFRC522 RFID readers to an Arduino Uno, she’s come up with a method of triggering a device (like an electronic door lock) only when the appropriate combination of RFID ...

For the electronics, of course, there’s an Arduino. There’s also an RC522 RFID reader. We couldn’t help but think of the Keyduino for this application. When the system is locked, the Arduino ...