Hi, I have an Arduino Nano and a W5100 Ethernet Shield for an Arduino Mega 2560. When the shield is attached to the Mega, everything workks just fine, now I connected it to my Nano, using the SPI pins from the ICSP-header on the shield and pins 10 to 13 on the nano as shown in the code examples. I am powering the setup with an external power supply and an 7805 regulator to nearly 5V.
The problem is that everytime I open the serial console it shows (for the Ethernet->WebServer example)
Ethernet WebServer Example
Ethernet shield was not found. Sorry, can't run without hardware.
I am running out of ideas, can you guys help me?