After building the project, first we can run the LED blink example. We have to login to Odroid using SSH from PC in multiple terminals for running this example.

• Start roscore in one terminal:

    $ roscore 

• Run the executable as root in the another terminal:

    $ sudo -s
    # cd  /home/odroid/catkin_ws/build/ros_wiring_examples
    #./blink_led

After starting the blink_led node, publish 1 to the led_blink topic in
another terminal.

• For LED to ON state:

    $ rostopic pub /led_blink std_msgs/Bool 1     

• For LED to OFF state:

    $ rostopic pub /led_blink std_msgs/Bool 0