Closed-contact buttons are very useful in a demonstration environment. The buttons are very stable and very simple to implement. The example below is used to play different types of musical genres which are demonstrated on the TV speakers. The user can walk up and touch illuminated buttons allowing them to switch from one music genre to another.
The presentation is quite simple there are three buttons being used, every time a button is pressed it sends a message and triggers music. When the music stops playing or if the user presses a different button the song will change. If the user walks away the song will end and the presentation returns to the main loop.
The GPIO buttons are connected dot t e GPIO phoenix connector of the player