Hello all,
I have a problem with this too. I got an Mega with and ethershield that uses the 10-13 pins, but also the ICSP header.
can someone explain me this? what is the really useful pins? the header on the right ( with the 6 pins) or the 10-13 pins? or, in my case, on the MEGA, should I use the 10-13 or the 50-53 or even the 50-52 and leave the 10 put?
this is driving me nuts, because I cannot figure out how have worked in the past and is sort of random...