We need a prototype app that needs to run on one physical iPad mini 4.
The app must:
-be able to load a set of numbered images (png) stored on a fixed web address as a zip file.
-basic user interface for loading the file, and set a time interval;
-connect with BLE to an electronic board (an Arduino with HM-10 BLE module)
-a button that starts showing the images one after the other, separated by the time interval; sending a command code via BLE after each image shows.
-after showing the images has started, the screen has to stay full screen black, except for the images.