Arduino NFC tag reader

Project

• Read NFC tag
• validate the id of the tag against remote server
• if tag id is a valid one then trigger a digital output. If none then trigger another digital output

MFRC522 Connection

• sda: 10 (*) -> 8
• sck: 13
• Mosi: 11
• Miso: 12
• Rq: --
• Gnd: Gnd
• Rst: 9
• 3.3V: 3.3V

(*) Take care: If we use ethernet shield with a MFRC522 there's a SPI conflict (due to ethernet shield's SD card reader). We need to use another sda pin (here I'm using pin 8 instead of 10) and disable w5100 SPI before configure ethernet

// disable w5100 SPI
pinMode(10, OUTPUT);
digitalWrite(10, HIGH);

Hardware:

• Arduino UNO (https://www.arduino.cc/en/Main/ArduinoBoardUno)
• Ethernet shield W5100 (https://www.sparkfun.com/datasheets/DevTools/Arduino/W5100_Datasheet_v1_1_6.pdf)
• RFID/NFC Sensor MFRC522 (http://playground.arduino.cc/Learning/MFRC522)

Server

• A simple TCP server with node
• To start the server

node node/server.js

Demo

References:

• https://www.luisllamas.es/arduino-rfid-mifare-rc522/
• http://hetpro-store.com/TUTORIALES/modulo-lector-rfid-rc522-rf-con-arduino/
• https://forum.arduino.cc/index.php?topic=198768.0