http://arduino.cc/en/Reference/AttachInterrupt#.UwzskeN_t8ESPI http://tronixstuff.com/2011/05/13/tutorial-arduino-and-the-spi-bus/D9 to CS (yes, D9, not D14 aka the SS pin, more on that later) D15 to SCLK D16 to MOSI D17 to MISO 3v3 to 3v3…