Picture of 0-1 hardware can be seen here

When the Arduino detects a high input on pin 2 (rfidIn - see #Code), a random number is generated between 0 and 100. If this number is less than or equal to 50, then the Arduino assumes this is a valid card and opens the lock (an LED in this case) and turns on the green LED for 3 seconds. If this number is more than 50, then the Arduino assumes this is an invalid card and just turns on the red LED for 3 seconds.

This is a sample serial output from the Arduino

Serial Connection Innitiated
Welcome to HACMan Security
----------------------------
Access Denied
Number:51

Access Granted
Number:49

Access Granted
Number:5

Access Denied
Number:72

Access Denied
Number:76

Previous Sub-Versions

/*  RFID Door Control
 by Thomas Bloor - aka. TBSliver

 Version: 0-11

 This version has only a very basic functionality
 which is done using LED's, a hardware switch, and
 a random number generator.
 This version also includes extras for the serial menu.
 */

char menuInput[36];

int redPin = 5;
int yellowPin = 4;
int greenPin = 3;
int lockPin = 6;
int rfidIn = 2;

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin,OUTPUT);
  pinMode(lockPin, OUTPUT);
  pinMode(rfidIn, INPUT); //change to serial input for RFID reader

  Serial.begin(9600); //Serial output to comp at 9600bps
  Serial.println("Serial Connection Innitiated");
  Serial.println("Welcome to HACMan Security");
  Serial.println("Please type menu to enter the menu");
  Serial.println("----------------------------");

  randomSeed(analogRead(0));

  //startup LED pattern
  digitalWrite(redPin, HIGH);
  digitalWrite(yellowPin, HIGH);
  digitalWrite(greenPin, HIGH);
  delay(500);
  digitalWrite(redPin, LOW);
  digitalWrite(yellowPin, LOW);
  digitalWrite(greenPin, LOW);
  delay(250);
  digitalWrite(yellowPin, HIGH);
}

void loop() {
  int val=0,randNumber=0;

  val = digitalRead(rfidIn); //will be replaced with serial in

    if(val==1){
    delay(500); //debounce
    randNumber = random(100); //only to get a non-unlock element

    if(randNumber<=50){ //insert search pattern here
      Serial.println("Access Granted");
      Serial.print("Number:");
      Serial.println(randNumber);
      Serial.println("");
      digitalWrite(greenPin, HIGH);
      digitalWrite(lockPin, HIGH);
      delay(3000);
      digitalWrite(greenPin, LOW);
      digitalWrite(lockPin, LOW);
    }
    else{
      Serial.println("Access Denied");
      Serial.print("Number: ");
      Serial.println(randNumber);
      Serial.println("");
      digitalWrite(redPin, HIGH);
      delay(3000);
      digitalWrite(redPin, LOW);

    }
  }
  if(readSerial()==1){
    if(!strcmp(menuInput, "menu")){
      digitalWrite(redPin, HIGH);
      digitalWrite(greenPin, HIGH);
      menu();
      digitalWrite(redPin, LOW);
      digitalWrite(greenPin, LOW);
    }
    else {
      Serial.println("Did not understand command.");
      Serial.print("You entered: ");
      Serial.println(menuInput);
      Serial.println("type in menu to get to the menu");
      Serial.println("");
    }
  }
}

void menu(){
  boolean exit = 0,pass = 0;
  int tries=3;
  Serial.println("Welcome to the Menu System");
  Serial.println("\r\nPlease enter password to continue");
  while(pass==0 && tries > 0){
    if(readSerial()==1){
      if(!strcmp(menuInput, "pass")){
        pass = 1;
        Serial.println("Password correct");
      }
      else {
        Serial.print("Password incorrect, ");
        Serial.print(tries);
        Serial.println(" attempts left");
        tries--;
      }

    }
  }


  if(tries==0){
    Serial.println("All attempts used, exiting menu");
  }
}

int readSerial(){
  int i=0,serialNo=0;
  if(Serial.available() > 0) {
    delay(100);
    serialNo = Serial.available();

    for(i=0; i<serialNo; i++) {
      menuInput[i] = Serial.read();
    }
    menuInput[serialNo] = '\0';
    return 1;
  }
  else {
    return 0;
  }
}

Category:Madlab projects