Once you add networking, Arduinos don't really have much cost benefit over a full-fledged Linux SOC board. An Uno plus an Ethernet shield ends up being nearly t

Once you add networking, Arduinos don't really have much cost benefit over a full-fledged Linux SOC board. An Uno plus an Ethernet shield ends up being nearly the cost of a Raspberry Pi, which is several times more powerful. I built out my XMPP-controlled office thermostat on a BeagleBone Black, which costs a bit more than the Pi but has way more pins, including analog inputs, which are pretty important for temperature sensors. Plus using a Linux machine meant being able to choose your language instead of being stuck with C, so I took the chance to learn some Erlang: http://technomancy.us/171 http://technomancy.us/171