Control the 'GTA V' cellphone with an iPhone, Arduino and a hack
Grand Theft Auto V has a few mobile apps of its own, but one enterprising modder has taken the idea to its natural conclusion: an application that lets you control the in-game cellphone with an iPhone. With the application you can scroll through text messages on-screen, peep your current list of objectives and, among other things, even control the in-game phone's camera. The YouTube video's description (spotted by former Joystiq'r Dave Hinkle) does't offer much by way of details other than it's running on an Arduino Leonardo with an Ethernet shield connected to a PC, sadly.