can iphone use as a receiver?

Can iphone use as a receiver ? Let's say, there will be one app which can connect with a hardware that can send RDF signal. Is that possible iphone to receive signa开发者_JS百科l without any additional hardware ? Thanks.

It's not possible without any additional hardware.

In order to make peripherals work with iPhone you need to contact Apple and become a registered peripheral developer, the membership that allows manufacturers to use the "Made for iPhone" etc labels.

Once you're a member you can get access to the peripherals SDK which allows you to develop for devices that connect to the iPhone using the 30 pin dock connector.

Without developing a device that receives RDF signal that can connect to the iPhone either using the dock connector or a network connection, there's no other way to make the iPhone receive that signal.

If the RDF hardware is able to communicate using standard UDP or TCP/IP based methods then the iPhone can communicate with it using network communication classes. This could be CFNetwork or higher level classes such as NSURLConnection.