RN-42 help for arduion

Hello!

So i got this from my brother for my birthday http://www.rovingnetworks.com/products/RN_42

Can I get some help on actually using it with an arduino? I have the duemilanove.

THe RN-42 is 3.3 volt where the Arduino is 5 Volt. If you connect it to a serial of the Arduino you can send with the arduino but will not be able to read it.

So you need something like - http://www.sparkfun.com/products/8745 - to get it working.

Example project I came accross - http://trandi.wordpress.com/2012/01/13/spoka-night-light-controlled-from-and-android-phone/

Yea I know that but I mean I need a guide on how you actually use it, like pins and code