#rc522-rfid node.js module to access a rfid reader with rc522 chipset which is connected a raspberry pi

Warning

The library work with RPI v1 only. It is based on bcm2835 module. The RIPv2 has different addresses.

On RPI 2, the peripheral addresses are different and the bcm2835 library gets them from reading /proc/device-tree/soc/ranges. This is only availble with recent versions of the kernel on RPI 2.

Source: http://www.airspayce.com/mikem/bcm2835/ Issue: sbrinkmann#2

Purpose

This node module is to access RFID reader with a rc522 chipset (e.g. http://amzn.com/B00GYR1KJ8) via GPIO interface of the raspberry pi.

Functionality

The module is currently only able to read the serial number of the tag which is hold onto the reader.

Requirements

• The RFID reader is plugged onto the raspberry pi like it is described over here http://geraintw.blogspot.de/2014/01/rfid-and-raspberry-pi.html
• The GCC compiler is installed sudo apt-get install build-essential
• node-gyp is installed npm install -g node-gyp

Installation

First of all we have to install the C library for Broadcom BCM 2835 as it describe` here

wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.35.tar.gz
tar -zxf bcm2835-1.35.tar.gz
cd bcm2835-1.35
./configure
sudo make install

Then we can install the rc522 rfid nodejs module

npm install --save rc522-rfid

Usage

var rc522 = require("rc522-rfid");

rc522(function(rfidSerialNumber){
	console.log(rfidSerialNumber);
});