The Raspberry Pi has a useful set of gpio pins to which we can attached a wide range of devices, inputs and sensors. This package provides support for many of them. The original version was written by Doug McPherson to use a home-brew library. This version has been hacked up to use the pigpio library (see http://abyz.co.uk/rpi/pigpio/) which is now part of the standard Raspbian distribution. Remember to start the pigpiod daemon with`sudo pigpiod`.