How to read data from a 3.5mm headphone hack?

[nathanpc]

I was searching for a way to read data from a 3.5mm hack using an Arduino, but I couldn't find a well-detailed, beginner-friendly, tutorial on how to make this, at least how to wire everything and create a simple I/O code. Anyone know a good, beginner-friendly, tutorial about this topic?

PS: I don't want to use a modem like this, I to learn and make it not communicate only with iOS/Android devices.

[CrossRoads]

What's connected to the other end of the 3.5mm connector?

[nathanpc]

I was thinking about using my TI-84 for testing, then move to create a remote shutter release for my Canon 60D, and after that move to more awesome stuff like interacting with iOS and Android devices.


Sent from my iPad at 1:35am

[AWOL]

I only managed 2.7 million hits for "TI84 Serial Interface", but I still haven't got to the end of them.

[nathanpc]

My question is not about how to make my TI-84 send the information, I already know that, it's about how to wire the connector to the Arduino to read the information.

[AWOL]

Ah! "Arduino TI84" was only 1.5 million results.

[WinstonP]

from the description of the Audio Jack Modem for the iPhone it looks like just a regular acoustic modem from back in the day (110, 300, 1200 modems). and convertor is only translating the highs and lows of the audio coming in from the iPhone to a digital signal (5v 0v).
try this link to see if it might help....
http://www.appszoom.com/android_applications/tools/audio-serial-out_ssqt.html
the reason for the four conductor 3.5 jack is because it has a microphone line to bi-directional communication.
I found the schematic at http://robots-everywhere.com/re_wiki/index.php?title=Serial_on_Android_using_the_audio_port

[nathanpc]

Thanks very much for the help. I'm going to look at that right now.