Shameless plug: A few co-workers and I hacked together the same thing not too long ago, using an Arduino: http://www.command-tab.com/2013/07/23/gottago/ http://

Shameless plug: A few co-workers and I hacked together the same thing not too long ago, using an Arduino: http://www.command-tab.com/2013/07/23/gottago/ http://www.command-tab.com/2013/07/23/gottago/