It looks like the WIZ550web boards have the 5500 chip configured to respond to pings. However, we need the Wiznet to send pings from code run through the ARM processor. It looks like a great deal of functionality to the 5500 isn’t in place in the example code or explicitly commented out. Is this something that could be pointed out, or even just firm confirmation that raw IP sockets should still work over what appears to be a serial bus between the two chips?
