robheaton wrote:link to a site to buy the wifi modules?
Web of the producer:
See support page for manuals:
I got them from Mouser.
I had free postage, they only needed to sign a certificate due to cryptographic technology exporting rules (I got the certificate by email, it is possible to paste picture of the signature into the Word document and send back, or print, it, sign, and send by fax).
Be careful, they have 4 versions of these modules.
US (120 V) and EU (230 V), with or without power supply (module can also be powered via pin 9 of the serial cable)
To show all 4 variants, search for "IW2128-232" at Mouser webpage http://uk.mouser.com/Search/Refine.aspx?Keyword=IW2128-232