Need help with RFID cryptography (self.arduino) submitted 4 years ago by nicolasbisi Hey, I've been playing around with my Arduino and my RC522 RFID and I'm able to read and write information on the tag's perfectly. Hi. I already made a simple RFID Card Reader with my Arduino UNO and MIFARE RC522. I also got it working with my Custom Time Attendance System by reading the serial output of the Arduino after reading the card. Now I'm looking at expanding this by attaching an SD Card Module to make it as a standalone device for collecting attendance logs. RFID RC522 Gate Access Control with Arduino In this illustration we will going to wire the RFID (Radio Frequency Identification) Module RC522 in this module it uses a radio signals and a Radio Label Tags for reading and writing data. This is a simple explanation on how to use an RFID-RC522 connecting to a Arduino UNO Link to the Library, and I used the example that comes with the Library Specifically the RFID RC522 module and the 1602A LCD. If you aren't familiar with RFID it stands for Radio Frequency Identification. It is a way to read information wirelessly. The benefit is that the RFID ID cards are cheap, and don't require being powered, the RFID transceiver powers it using an electromagnetic field. 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 to open a door lock and if you need a louder alarm then you can replace the small buzzer with a high power siren. read and weep here to check my efforts on getting the RFID-RC522 to work first of all, what is it? the RFID-RC522 is a very cheap RFID readerwriter. it's small, it works and it's cheap. that makes it awesome you can buy it at DX for about 11 bucks including shipping here and it looks like this: Arduino RFID Library for MFRC522 (SPI) MFRC522. Arduino RFID Library for MFRC522 (SPI) Author GithubCommunity Website #235 RFID Hacking and Cloning with Magic Cards, Proxmark3 and Arduino (T5577) - Duration: 10:05. Andreas Spiess 93,074 views Thus, this is all about RFID reader, an Arduino board, interfacing of RFID reader with Arduino, RFID based Automatic Door Lock System with Arduino Uno, circuit diagram of Automatic Door Lock System and working. We hope that you have got a better understanding of this concept. Interfacing of RFID RC522 with Arduino. Now let's start with the interfacing of RFID RC522 with Arduino. There are many different RFID modules available in the market. The RFID module, which I am gonna use in this project, is RFID-RC522. Its quite easy to interface and works pretty fine. This module has total 8 pins as shown in the below overview arduin overview arduin