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Can an iPhone or iPod Touch communicate with another device in the same room?

I am new to iPhone and iPod touch app development. Is it possible to communicate directly between two devices in the same room using WiFi or maybe even BlueTooth on the iPhone?

I saw a demonstration of a fire application where one iPhone “lights” the other iPhone as they approach each other. How is this achieved?

The bottom line is that I’m studying the option of developing a game in which you can play with another person in the same room.

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iPhone supports Bonjour-based service discovery, and several applications use this to do things like sync with a PC on the same network. Explore samples and manuals in the iPhone SDK. Good examples for WiTap and BonjourWeb. NSNetServices and CFNetServices are the APIs you'll deal with Bonjour

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iPhone - iPhone connectivity can also be made via Bluetooth using GameKit .

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