Pins 50-52 are the SPI bus used to communicate with the Ethernet controller chip on your shield. You have a huge number of pins on the Mega, do you really need those three pins for whatever ulterior purpose?
Pins 50-52 are the SPI bus used to communicate with the Ethernet controller chip on your shield. You have a huge number of pins on the Mega, do you really need those three pins for whatever ulterior purpose?