I am building a project in which I am interfacing an old touch-tone telephone with my arduino. I have successfully hooked up my ardiuno to a telephone which hooked up to another telephone that the user will use. I have basically made an intercom system. I am able to generate DTMF tones with the Tone library (https://code.google.com/p/rogue-code/wiki/ToneLibraryDocumentation
). I am using the schematics (input and output) in another post: http://forum.arduino.cc/index.php?topic=177166.0
I am looking for a library that I can use the input circuit with. I don't want to have to use a DTMF decoder unless it is the only option
. I saw this post (http://forum.arduino.cc/index.php?topic=121540.0
) but the library doesn't work. I want it so that when someone presses a key on the telephone the arduino can detect which tone is pressed. Basically using the telephone as a keypad.
My first idea for this is to make a basic simon game where a random tone is played and then more and you have to keep up by memorizing it and playing it back. Another is to get the Ethernet shield and have it check my email or some other things. Lastly, I am going to make it sound like you are listening in to someone else's call.
Thanks in advance
Arduino Mega 2560 R3
Windows 8 32-bit