Resources https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/README.md https://www.kernel.org/doc/Documentation/spi/spidev Enabling The SPI Port The SPI port needs to be enabled in Rasbian before it can be used. See here. Leave the IO pins used unconfigured (do not set them as inputs or outptus). Using The SPI Port With The BCM2835 library by Mike McCauley This uses the same library as used for the IO … Continue reading Using The SPI Interface