Just typed this app up really quickly. I'm not familiar with the app you're using to connect to the WICED boards, so I can't guarantee anything on that end.
This app has a single user defined service that does nothing but toggle 1/0 on the click of the button. I didn't have time to implement debouncing so the values are very shaky and unsyncronized. But it should be a good starting point for you.
This app was tested with LightBlue.
Jacob
