First and foremost, OctoPi is a fantastic pre-built image for a Raspberry Pi (Model A, B, or B+) that is designed to connect to your 3d printer and provide a web interface to interacting with your printer, all using the simple and powerful OctoPrint software. In my case, I’m connecting it to my Printrbot Simple Metal.
OctoPrint is incredibly powerful: you can connect a Raspberry Pi camera, print out a camera mount to attach it to your bed and actually watch your printer through the OctoPrint webpage (or record video, if that’s your thing). You could even do it in complete darkness (with IR LEDs). I have my printer in the same room, but it’s good to dream.