audio - iPhone 3.5mm jack based application -

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I want to encrypt the data through a DTFF encoder and send it back to the iPhone via 3.5mm jack . Is it possible to send data back into 3.5mm jacks? The traditional audio signal is sent to the iPhone 3.5mm jack?

Does the DTMF and iPhone's external accessory framework have any provision to deal with 3.5mm jack based input applications?

Yes, this is possible. You have to record the input sound and use the DTMF receiver, which is a trivial and low-CPU task nowadays.

This subject is not included in the iPhone minor specification. However, users have better ways to communicate with the installed app ...


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