title: Blinking an LED with an Arduino and pySerial
body: <p>I feel really silly for asking this, but I've been shocked at my inability to find the simplest example I can imagine for talking to an Arduino over Serial. I have a connection set up, and I understand how to write both Arduino Code and Python, but I have no idea how to write to an arduino pin using python. Can anyone point me to a location with this example or show me how it's done?</p>