To simplify things I made an eBay item:
Just search eBay for "monalisa zigbee".
So the 15$ would not include shipping. But it's only a few extra bucks.
The arduino side is up to you. No arduino is included. There is a sample arduino sketch available...
https://www.dropbox.com/s/iaus9g2h2vxr3kn/softserial.ino?dl=1
as discussed in the documentation...
You don't even have to use an arduino. Anything that can talk serial (raspberry pi, computer with USB adapter, etc.) could easily talk with it.
