Running the Example Code

Download the example sketch from our Github repository:


Connect a LED to IOA and IOB as follows:

  • Cathode (short leg) of LED connected to the GPIO pin.
  • Anode (long leg) of LED connected to one end of a resistor*.
  • Other end of the resistor connected to 5v.

* A 1K resistor is shown here as a 'safe' value. For maximum LED brightness, you can learn how to calculate the optimum resistance in this guide:
Compile and upload the example sketch and you should see both LEDs blinking: 1 second on and 1 second off.
Last updated on May 04, 2015 Published on Mar 28, 2014