Reading data through the iPhone audio jack

Question

I am looking for a way to read the raw data that is sent from the Arduino audio jack via the iPhone.

I searched a lot and found this , which determines if the plug-in is connected or not, but could not find any code to read the source data.

Any help in this regard would be greatly appreciated!

Thanks.

Answer 1

If the bandwidth of the input signal fits into the bandwidth of the iPhone A / D converter (20 to 20 kHz), you can read it.

Tip/Ring1/Ring2/Sleeve ( ) (Tip/Ring/Sleeve ( ) ).

analogue, ( Frequency-shift keying ) digital, ( , , ):

https://github.com/jensmeder/FSKModem https://en.wikipedia.org/wiki/Frequency-shift_keying

lib ( ? , ):

https://github.com/billhsu/jackDuino

( iPhone):

https://www.sparkfun.com/products/retired/10331