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This Gem is a wrapper around an useful open-source library for creating QR Codes, a two-dimensional bar code format popular in Japan (and readable by cell phones even) created by the Denso-Wave Corporation in 1994. These bar codes look like the following:


can you see what the secreet in this picture..?

This how to make make and read CODE QR:
How to make:
install GR CODE:
# sudo apt-get install qrencode

Make QR CODE:
# qrencode -o namecodeqrcode.png 'text'

or you won the big pict
# qrencode -o namecodeqrcode.png -s 20 -m 1 'text'
it mean size=20 margin=1

How to read the code:
download kaywareader
chose what your type phone:
and install it

good luck!!