gumball_reader.ino

/*
 * USB Wiegand Interface Reader for Arduino Leanardo
 *
 * Version 1.0 Dan Julio, May 18, 2013
 *
 * This code is released into the public domain.  It is absolutely unwarranted and unsupported
 * meaning it may or may not work for you and you have to deal with that.
 * running on the computer.  The firmware may also be used in a stand-alone fashion just to read
 * 26-bit cards and display their card number.
 *
 * The firmware makes use of the following Arduino Libraries.  It also makes use of the Leanardo's
 * USB keyboard emulation capability.
 *   2. Timer1 Library
 *   3. MonkeyBoard's Wiegand arduino library (www.monkeyboard.org -
 *      https://github.com/monkeyboard/Wiegand-Protocol-Library-for-Arduino)
 *
 * Arduino Pin Assignment
 *   Pin  2: Weigland compatible reader Data 1 (Note 1)
 *   Pin  3: Weigland compatible reader Data 0 (Note 1)
 *
 *
 *   Pin 10: Active Low Button Input (Note 3)
 *   Pin 11: Active High LED Output (Note 4)
 *
 * Notes:
 * - Doesn't have button functionality or saving functionality.
 *
 */

//#include <TimerOne.h>
#include <Wiegand.h>
#include <Adafruit_NeoPixel.h>
//#include <RfidDb.h>

// -------------
// Constants
// -------------

// The inactivity timeout specifies, in seconds, how long after a card is read and displayed on the LCD
// to reset the LCD display back to the "Scan Card" message.
//#define INACTIVITY_TIMEOUT 60

// The Ticks per second defines the button debounce period and is also used evaluate the inactivity timer
//#define TICKS_PER_SECOND 40


// -------------
// Variables
// -------------
volatile boolean DebounceTick = false;
boolean SecondTick = false;
int SecondTimerCount = 0;
int InactivityTimerCount = 0;

boolean  CardRead = false;
boolean  ValidCard = false;  // Only valid if CardRead is also true
int      NumCardBits;
unsigned long CardData;
uint16_t CardNumber;


// -------------
// Hardware Objects
// -------------
WIEGAND wg;

#define PIN 6
#define NUMPIXELS 1

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);


// -------------
// Arduino Entry points
// -------------
void setup () {
  Serial.begin(9600);
  // Configure the hardware
  wg.begin();
  pixels.begin(); // This initializes the NeoPixel library.

  pinMode(5, OUTPUT);
  digitalWrite(5, HIGH);

  SetLedOutput(false);

  // Enable Timer1 to call an ISR for debouncing the button and as a timebase for the inactivity timer.
  //Timer1.initialize(1000000 / TICKS_PER_SECOND);
  //Timer1.attachInterrupt(TimerOneHandler);
}

// Note: The Wiegand library must be polled constantly in order to find the start of a transmission
//       so we don't put any delaying activities in the main loop while we are polling for new card
//       activity.
void loop () {
  // Look for input from the card reader
  if (wg.available()) {
    NumCardBits = wg.getWiegandType();
    CardData = wg.getCode();

    Serial.print("Wiegand HEX = ");
    Serial.print(CardData,HEX);
    Serial.print(", DECIMAL = ");
    Serial.print(CardData);
    Serial.print(", Type W");
    Serial.println(NumCardBits);

    if (NumCardBits == 26) {
      SetLedOutput(true);
      digitalWrite(5, LOW);
      delay(100);
      digitalWrite(5, HIGH);
    } else {
      SetLedOutput(false);
    }
    delay(100);
    SetLedOutput(false);
  }
}

// -------------
// Subroutines
// -------------

void SetLedOutput(boolean b) {
  if (b) {
    pixels.setPixelColor(0, pixels.Color(0,150,0)); // Moderately bright green color.
    pixels.show(); // This sends the updated pixel color to the hardware.
  } else {
    pixels.setPixelColor(0, pixels.Color(150,0,0)); // Moderately bright green color.
    pixels.show(); // This sends the updated pixel color to the hardware.
  }
}