Arduino RFID Security System

1#include <LiquidCrystal_I2C.h>
2#include <SPI.h>
3#include <MFRC522.h>
4#include  <Wire.h>
5LiquidCrystal_I2C lcd(0x27, 16, 2);
6
7unsigned long startMillis;  //set up millis for reset
8unsigned long currentMillis; //pull up millis for reset
9const  unsigned long period = 604800000; //the value is a number of milliseconds, ie 7  days
10
11#define SS_PIN 10
12#define RST_PIN 9
13#define RELAY 3 //relay pin
14#define  BUZZER 2 //buzzer pin
15MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance.
16void  setup() {
17  Serial.begin(9600);   // Initiate a serial communication
18  SPI.begin();
19  mfrc522.PCD_Init();
20  pinMode(RELAY, OUTPUT);
21  pinMode(BUZZER, OUTPUT);
22  noTone(BUZZER);
23  lcd.init();
24  lcd.clear();
25  lcd.backlight();
26  tone(BUZZER,  1000);
27  delay(100);
28  noTone(BUZZER);
29  lcd.print(F("ARDUINO SECURITY"));
30  lcd.setCursor(0, 1);
31  lcd.print(F("      DOOR  "));
32  delay(2000);
33  lcd.clear();
34  lcd.print(F("   ACTIVATING    "));
35  lcd.setCursor(0, 1);
36  lcd.print(F("     SYSTEM    "));
37  delay(2000);
38  lcd.clear();
39  digitalWrite(RELAY,  HIGH);
40  delay(2);
41  digitalWrite(RELAY, LOW);
42  lcd.print("   PLEASE  BE ");
43  lcd.setCursor(0, 1);
44  lcd.print("    PATIENT  ");
45  delay(2000);
46  digitalWrite(RELAY, LOW);
47  tone(BUZZER, 1000);
48  delay(1000);
49  noTone(BUZZER);
50  lcd.clear();
51  lcd.print("   SCAN CARD ");
52  lcd.setCursor(0, 1);
53  lcd.print("   TO UNLOCK  ");
54}
55
56void(*resetFunc) (void) = 0;
57
58void  loop() {
59  currentMillis = millis();  //get the current "time" (actually the  number of milliseconds since the program started)
60  if (currentMillis - startMillis  >= period)  //test whether the period has elapsed
61  {
62    resetFunc(); //call  reset
63  }
64  if ( ! mfrc522.PICC_IsNewCardPresent())      return;   // Look  for new cards
65  if ( ! mfrc522.PICC_ReadCardSerial())    return;  // Select one  of the cards
66  Serial.print(F("UID tag :"));
67  String content = "";
68  byte letter;
69  for (byte i = 0; i < mfrc522.uid.size; i++)
70  {
71    Serial.print(mfrc522.uid.uidByte[i]  < 0x10 ? " 0" : " ");
72    Serial.print(mfrc522.uid.uidByte[i], HEX);
73    content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
74    content.concat(String(mfrc522.uid.uidByte[i], HEX));
75  }
76  Serial.println();
77  content.toUpperCase();
78  if ((content.substring(1) == "93 6D BE 0D")
79      || (content.substring(1) == "51 67 DC B0")
80      || (content.substring(1)  == "A3 23 74 11") //change here the UID of the card/cards that you want to give  access to
81      || (content.substring(1) == "55 42 2B 0D"))
82  {
83    lcd.clear();
84    lcd.backlight();
85    lcd.print("     ACCESS     ");
86    lcd.setCursor(0,  1);
87    lcd.print("    GRANTED!    ");
88    digitalWrite(RELAY, HIGH);
89    tone(BUZZER, 1000);
90    delay(400);
91    noTone(BUZZER);
92    delay(6600);
93    digitalWrite(RELAY, LOW);
94    lcd.clear();
95    lcd.print("   SCAN CARD  ");
96    lcd.setCursor(0, 1);
97    lcd.print("   TO UNLOCK  ");
98  }
99
100  else   {
101    lcd.clear();
102    lcd.backlight();
103    lcd.print("     ACCESS     ");
104    lcd.setCursor(0, 1);
105    lcd.print("     DENIED     ");
106    tone(BUZZER, 1000);
107    delay(150);
108    noTone(BUZZER);
109    delay(25);
110    tone(BUZZER, 1000);
111    delay(150);
112    noTone(BUZZER);
113    delay(25);
114    tone(BUZZER, 1000);
115    delay(150);
116    noTone(BUZZER);
117    delay(25);
118    tone(BUZZER, 1000);
119    delay(150);
120    noTone(BUZZER);
121    delay(25);
122    tone(BUZZER, 1000);
123    delay(150);
124    noTone(BUZZER);
125    delay(1000);
126    lcd.clear();
127    lcd.print("   SCAN CARD ");
128    lcd.setCursor(0, 1);
129    lcd.print("   TO UNLOCK  ");
130  }
131}