Raspberry PI and Pi Face project¶ ↑ Project using proximity sensors (Range Finders) Rails 3.2.13 application¶ ↑ Raspberry PI and the PI Face: Follow the instructions found at … github.com/blakejakopovic/piface $ sudo modprobe spi_bcm2708 $ sudo chown `id -u`.`id -g` /dev/spidev0.*