
Step 1: Parts
1 Arduino Nano. (if you have an Arduino Uno, just plug it in and you’re done – no need for this instructable!)
1 Ethernet shield with SD card slot, with Wiznet w5100 chip. The w5100 is directly supported by the Arduino libraries, which could save a lot of programming pain.
5 m-m hookup wires.
1 breadboard
1 micro SD card
a couple of business cards or a piece of paper (to make sure we don’t accidentally short out pins on the shield)
Step 2: Insert Arduino Nano Into Breadboard
I usually insert my Nano right at the edge of the board, so that the USB connector hangs over the edge, and D12 and D13 are in the holes closest to the edge. The pictures on the next steps show it well.
Step 3: Plug ICSP of Shield Onto the Nano
Step 4: Connect the Wires
Connecting the wires is easy – simply match up the label on the Arduino Nano with the same label on the ethernet shield. The ICSP connector does most of the work and hooks up the power, so we only need 5 wires to complete the setup:
Pins 11, 12, 13 (SPI bus)
Pin 10 selects the w5100
Pin 4 selects the SD card
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