redis-rfid

Overview

This is a set of software tools used in a Raspberry Pi RFID enabled Kiosk.

The complete project involves

• running chromium in kiosk mode as a single .xinitrc program browsing localhost (see example.xinitrc)
• getting RFID id and store it locally (see redis-rfid-serial.c)
• use the locally stored rfid, add some other values on a web form (see example-ajax.html)
• send data via web-service to a remote (ADempiere) server (see sinatra app redis-rfid.rb)

redis-rfid-serial

Endlessly reads RFID card tokens (serially from /dev/ttyUSB0) and pushes the value into redis with name rfidcard. Tested on a Raspberry Pi with a Sparkfun RFID USB Reader SEN-09963

To compile

• first get and compile the hiredis c library https://github.com/antirez/hiredis
• then compile this program and link it with libhiredis.a

$ cc -o redis-rfid-serial redis-rfid-serial.c libhiredis.a

To test

$ ./redis-rfid-serial &

then swipe some rfid card or tag on the reader and check

$ redis-cli get rfidcard

Todo

• a makefile
• a redis connection settings and serial reader settings as parameter
• a debug flag to show on stdio what's happening
• wrap up an init.d script to daemonized the thing

redis-rfid.rb

This is a very minimal and simple sinatra application that demonstrate how to wrap it all up. It contains:

• the ajax call to refresh the input text with the last rfid card read

Todo

• a lookup function to retrive operator's picture
• add ajax code to show picture on web page

example.xinitrc

Simple way to start x windows in kiosk mode with chromium.

example-ajax.html

Simple file to show rfidcard refresh with ajax and webdis

example-unicorn.init

The unicorn init.d file i'm using.

example-rc.local

The rc.local i'm using

example-inittab

The inittab i'm using