Wiegand 26 and Wiegand 34 library for Arduino

The Wiegand interface is a de facto standard commonly used to connect a card reader or keypad to an electronic entry system. Wiegand interface has the ability to transmit signal over long distance with a simple 3 wires connection. This library uses interrupt pins from Arduino to read the pulses from Wiegand interface and return the code and type of the Wiegand.

Requirements

The following are needed

[Arduino] (http://www.arduino.cc) Any ATMEGA328 compatible board should work.
[Wiegand RFID Reader] (http://www.monkeyboard.org/products/85-developmentboard/84-rfid-wiegand-protocol-development-kit) The code was written for this reader however customers reported working with [HID] (http://www.hidglobal.com/products/cards-and-credentials) compatible readers.
DATA0 of Wiegand connects to Arduino PIN 2 and DATA1 of Wiegand connects to Arduino PIN 3

Installation

Create a folder named Wiegand in Arduino's libraries folder. You will have the following folder structure:

cd arduino/libraries
mkdir Wiegand
cd Wiegand
git clone https://github.com/monkeyboard/Wiegand-Protocol-Library-for-Arduino.git .

Arduino Sketch

Execute Arduino IDE, select Example-->Wiegand-->WiegandTest

Example


#include <Wiegand.h>

WIEGAND wg;

void setup() {
	Serial.begin(9600);  
	wg.begin();
}

void loop() {
	if(wg.available())
	{
		Serial.print("Wiegand HEX = ");
		Serial.print(wg.getCode(),HEX);
		Serial.print(", DECIMAL = ");
		Serial.print(wg.getCode());
		Serial.print(", Type W");
		Serial.println(wg.getWiegandType());    
	}
}

Contributors

Francesco Uggetti (ugge75) improved this version of library to support multiple readers for ATMEGA2560. Please check out his version of multiple wiegand readers library here

Apollon77 improved interrupt safety and removed sysTick from global

paulfurley added 4 bit code

PaulStoffregen added Use digitalPinToInterrupt on newer Arduino software, if present

Written by JP Liew

Project home: http://www.monkeyboard.org/tutorials/82-protocol/24-wiegand-converter

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.