I have earlier made an mini elevator run by an arduino. The purpose of the elevator was to have an iPad standing inside the elevator. Whenever the elevator is on the top the iPad plays one film, and whenever the elevator is on the bottom, the elevator shows another film. I quickly realized that having a slideshow showing the films synchronized with the amount of time the lift was holding still was impossible due to mechanical limitations.
My question is therefore: Does anyone have a good idea of how to make the iPad start the arduino code, whenever the film is over?