#include <SPI.h>
#include <MFRC522.h>
#include <Servo.h>
#define SS_PIN 10
#define RST_PIN 9
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
#define servoPin 3
Servo myServo;
int pos = 0;
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();
myservo.attach(3); }
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) == "XXXXXXXX") //change here the UID of the
card/cards that you want to give access
{
Serial.println("Authorized access");
Serial.println();
sweepServo();
delay(3000); }
else {
Serial.println(" Access denied");
delay(3000);
} }
void sweepServo(){
for (pos = 0; pos <= 180; pos += 1) { // goes from 0 to 180 degrees
// in steps of 1 degree
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0
degrees
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}}