Źródło: Security Access using MFRC522 RFID Reader with Arduino
POŁĄCZENIE
MFRC522 | ARDUINO UNO |
RST | 9 |
SDA | 10 |
MOSI | 11 / ICSP-4 |
MISO | 12 / ICSP-1 |
SCK | 13 / ICSP-3 |

BIBLIOTEKA
- miguelbalboa/rfid – biblioteka
KOD
Lekko zmodyfikowałem kod ze strony dodając kody breloka i karty
/* * * All the resources for this project: http://randomnerdtutorials.com/ * Modified by Rui Santos * * Created by FILIPEFLOP * */ #include <SPI.h> #include <MFRC522.h> #define SS_PIN 10 #define RST_PIN 9 MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance. #define UID1 "00 00 00 00" // wpisz kod uid breloka #define UID2 "00 00 00 00" // wpisz kod uid karty void setup() { Serial.begin(9600); // Initiate a serial communication SPI.begin(); // Initiate SPI bus mfrc522.PCD_Init(); // Initiate MFRC522 Serial.println("Approximate your card to the reader..."); Serial.println(); } void loop() { // Look for new cards if ( ! mfrc522.PICC_IsNewCardPresent()) { return; } // Select one of the cards if ( ! mfrc522.PICC_ReadCardSerial()) { return; } //Show UID on serial monitor Serial.print("UID tag :"); String content= ""; byte letter; for (byte i = 0; i < mfrc522.uid.size; i++) { Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "); Serial.print(mfrc522.uid.uidByte[i], HEX); content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ")); content.concat(String(mfrc522.uid.uidByte[i], HEX)); } Serial.println(); Serial.print("Message : "); content.toUpperCase(); if ((content.substring(1) == UID1) || (content.substring(1) == UID2)) //change here the UID of the card/cards that you want to give access { Serial.println("Authorized access"); Serial.println(); delay(3000); } else { Serial.println(" Access denied"); delay(3000); } }