If you want to be network accessible, the Raspberry Pi costs about the same as an Arduino with an ethernet added. As far as programming, simple is easy on Ardu

If you want to be network accessible, the Raspberry Pi costs about the same as an Arduino with an ethernet added. As far as programming, simple is easy on Arduino. The limits are further away with a Raspberry Pi. Say you want to log some data for later analysis. Trivial on a Pi. Anything more than a few kilobytes and you are wiring an SD card to your Arduino. I'm currently using Arduinos for well defined, simple functions, but for more complicated functions. I will use Raspberry Pis where the BeagleBone CPU is overkill, but Arduino will always win for low power use.