Connection Diagram
CODE
//Viral Science
//RFID
#include <SPI.h>
#include <MFRC522.h>
#include <Servo.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
#define SS_PIN 10
#define RST_PIN 9
#define LED_G 5 //define green LED pin
#define LED_R 4 //define red LED
#define BUZZER 2 //buzzer pin
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
Servo myServo; //define servo name
void setup()
{
Serial.begin(9600); // Initiate a serial communication
SPI.begin();// Initiate SPI bus
lcd.init();
lcd.backlight();
mfrc522.PCD_Init(); // Initiate MFRC522
myServo.attach(3); //servo pin
myServo.write(0); //servo start position
pinMode(LED_G, OUTPUT);
pinMode(LED_R, OUTPUT);
pinMode(BUZZER, OUTPUT);
noTone(BUZZER);
lcd.setCursor(0,0);
lcd.print("SCAN YOUR CARD");
lcd.setCursor(0,1);
lcd.print("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));
}
content.toUpperCase();
if (content.substring(1) == "34 D6 4A B4") //change here the UID of the card/cards that you want to give access
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Authorized Access....");
lcd.setCursor(3,1);
lcd.print("WELL COME");
delay(500);
digitalWrite(LED_G, HIGH);
tone(BUZZER, 500);
delay(300);
noTone(BUZZER);
myServo.write(100);
delay(5000);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("SCAN YOUR CARD");
lcd.setCursor(0,1);
lcd.print("TO THE READER....");
myServo.write(0);
digitalWrite(LED_G, LOW);
}
else {
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Access denied...");
lcd.setCursor(2,1);
lcd.print("WRONG CARD");
digitalWrite(LED_R, HIGH);
tone(BUZZER, 300);
delay(1000);
digitalWrite(LED_R, LOW);
noTone(BUZZER);
delay(2000);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("SCAN YOUR CARD");
lcd.setCursor(0,1);
lcd.print("TO THE READER....");
}
}