This document describe the process to comunicate the Raspberry Pi with the
MFC522 RFID reader

RFID    RPI-SPI
---------------
RC522---RPI
SDA-----24
SCK-----23
MOSI----19
MISO----21
GND-----20
RST-----22
3.3V----1

#In raspbian 2016-05-27 you must add a line at /boot/config.txt
dtoverlay=spi0-hw-cs

#Download and install the SPI-Py libraries to use SPI in Python
git clone https://github.com/lthiery/SPI-Py
sudo apt-get install python-dev
sudo python setup.py install 

#The ReadChronojump.py reads from the RFID reader and writes it in /tmp/chronojump_rfid.txt
python ReadChronojump.py

#Download the MFRC522-python for the examples using RFID
git clone https://github.com/mxgxw/MFRC522-python
cd MFRC522-python
python Read.py
