Let’s connect a LED to the bread board and control it. You may want to read http://www.instructables.com/id/Breadboard-How-To/ to learn how to use bread board. As described in http://docs.spark.io/examples/, we need a resistor. Disconnect …

To create more complex app, I think I need to have a way to debug print. Yes you can do it very easily using serial port. http://docs.spark.io/firmware/#communication-serial I’m connecting my Core to MacBook Air by USB cable, so you would …

Now I know how to turn on/off the RGB LED. Let’s change color of the LED. Found a document at http://docs.spark.io/firmware/#libraries-rgb. Okay, I need to call RGB.control(true) in setup() method and can change color by calling RGB.color(…