I am using the http://www.nuelectronics.com/estore/?p=12#comment-1638 ethernet card. I have been trying to modify the webserver to monitor via ping (ICMP echo) multiple devices on a network inorder to to deactivate relays to turn devices off if the networked computers are disconnected.
The demo webserver by nuelectronics is based in part on work by Tuxgraphics DYI projects: avr microcontroller electronics . He has designed a tool, which performs a similar task, called "ethernet network host watchdog" tuxgraphics.org: An ethernet network host watchdog source code available Tuxgraphics Directory listing for ethernet host watchdog designed to be programmed onto tuxgraphics.org's "avr ethernet board with atmega328". This hardware appears to be similar to a combined arduino with the nuelectonics ethernet board.
I am having difficulty converting the code from tuxgraphics.org into code for arduino. (as has been performed by nuelectronics in the design of the template webserver http://www.nuelectronics.com/estore/?p=12#comment-1638 )
I am looking for some assistance in converting this code or advice on the code required to PING (ICMP echo) devices on a network.
Thankyou