Thank you for your help. The materials you provided me with look really helpful for my project. I think I googled uIP's web site before, but I'm a begginer in embedded system's world and it wasn't so obvious for me at that time that it could replace Atmel's TCP/IP library. The link to Fred Eady's "Networking and InternetWorking with Microcontroller" reffers to a post message that is no longer available. Can you please send me a valid link, if you know about it? Many thanks.