Is it possible to built an app which sends out RF signals? Is it possible to control the exact frequency? So each button would send different frequency signal? How far those signals usually reach?
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Sorry, I forgot to mention it is for andriod app – sillypurple Dec 12 '11 at 16:15
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http://www.brighthub.com/mobile/google-android/articles/98672.aspx – Prof. Falken Dec 12 '11 at 16:23
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Yes, but you need some external RF hardware - check out GNU radio and the general subject area of Software Defined Radio.
Paul R
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OK - in that case the answer is no, assuming that you're just talking about Android *phones* and not Android in general ? – Paul R Dec 12 '11 at 16:19
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Probably not for Android *phones* though which I suspect is what the OP is *really* asking about ? – Paul R Dec 12 '11 at 16:20
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Paul - you say the answer it no while Amigable Superman says NDK would so the work; – sillypurple Dec 12 '11 at 16:20
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Do you know an app that actually does it today? I am looking for proof of concept; I don't mind paying for developing simple app with 3 buttons, where each buttons sends out different radio frequency – sillypurple Dec 12 '11 at 16:22
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my target hardware would be a mobile phone like samsung galaxy or any other mobile that works with android – sillypurple Dec 12 '11 at 16:23
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I doubt there is any way of doing this with the phone on its own - you'd still need something like the GNU Radio hardware connected via USB. – Paul R Dec 12 '11 at 16:27
