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2 #include <SPI.h>
3 #include <MFRC522.h>
4
5
6 #define SS_PIN 10
7 #define RST_PIN 9
8 #define LED_G 4 //define green LED pin
9 #define LED_R 5 //define red LED
10 #define BUZZER 2 //buzzer pin
11 MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
12 int role=8;
13
14 void setup()
15 {
16 Serial.begin(9600); // Initiate a serial communication
17 SPI.begin(); // Initiate SPI bus
18 mfrc522.PCD_Init(); // Initiate MFRC522
19 pinMode(role,OUTPUT);
20 pinMode(LED_G, OUTPUT);
21 pinMode(LED_R, OUTPUT);
22 pinMode(BUZZER, OUTPUT);
23 noTone(BUZZER);
24 Serial.println("Put your card to the reader...");
25 Serial.println();
26
27 }
28 void loop()
29 {
30 // Look for new cards
31 if ( ! mfrc522.PICC_IsNewCardPresent())
32 {
33 return;
34 }
35 // Select one of the cards
36 if ( ! mfrc522.PICC_ReadCardSerial())
37 {
38 return;
39 }
40 //Show UID on serial monitor
41 Serial.print("UID tag :");
42 String content= "";
43 byte letter;
44 for (byte i = 0; i < mfrc522.uid.size; i++)
45 {
46 Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
47 Serial.print(mfrc522.uid.uidByte[i], HEX);
48 content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
49 content.concat(String(mfrc522.uid.uidByte[i], HEX));
50 }
51 Serial.println();
52 Serial.print("Message : ");
53 content.toUpperCase();
54 if (content.substring(1) == "60 3D CB 57") //change here the UID of the card/cards
that you want to give access
55 {
56 Serial.println("Authorized access");
57 Serial.println();
58
59 delay(500);
60 digitalWrite(LED_G, HIGH);
61 digitalWrite(role,HIGH);
62 delay(5000);
63
64 digitalWrite(role,LOW);
65 digitalWrite(LED_G, LOW);
66 }
67
68 else {
69 Serial.println(" Access denied");
70 digitalWrite(LED_R, HIGH);
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