In a world we teach ourselves a lot of things, why not do it Ruby-on-Rails-on-Pi way? Let’s get our hands on a piece of hardware, understand what it takes to setup one up, install a couple of libraries, Ruby, RVM, RBENV, a GUI. Let’s get a couple of sensors: motion, temperature, humidity, tsunami, ectoplasm and see if we detect a cool thing or two. Let's discuss how we can use what we know about Rails to explore things on a RaspberryPi. From a practical point of view, we will go through installation, setup, and build a monitoring Motion Sensor application on a RaspberryPi.