Casio PicapiCamera application allows iPhones to transfer messages by flashing lights
Flashing lights have on several instances been used to deliver messages using Morse code. Using a similarly based concept, Casio recently developed the PicapiCamera, the world’s first iPhone application capable of using light to communicate. The message to be sent is simply encoded in a series of lights flashing red, green and blue which is displayed on a smartphone’s screen. The phone on the receiving end uses its camera to detect the flashing lights on the screen and decode the message for the user to read. Currently developed only for iOS devices, this helps privately send messages to other smartphone users who’re within the 1 meter range, provided a bunch of rubber-necked strangers around you don’t have the application too.