Forum 2005-2010 (read only)
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Dec 04, 2010, 04:02 am
This is my first post. I am a newbie with Arduino.
Question: Is it possible to decode DTMF in software running on the Arduino? I plan to have a 3.5mm Jack connected somehow to the Arduino
and decode the incoming signal. I intend to use the Arduino Nano. The tones will be coming in relatively slow so time to process is not a major factor. The incoming DTMF tones will act as a password to activate each of the relays/outputs.
Any advice, code example would be great.
Thanks in advance.
Seattle, WA USA
Dec 04, 2010, 04:11 am
I was just over there. Google is working.
Dec 04, 2010, 06:04 am
There are lots of solutions based on a MT8870 tone decoder -- google will find this stuff
I have seen of discussion of direct tone detection using a Goertzel algorithm -- the wikipedia article has lots of useful links.
There is thread regarding audio spectrum analysis with Arduino here http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1289765675
Like Paul said -- google is your friend. Read what others have done first.
Dec 04, 2010, 06:27 am
Thanks PaulS, Yes indeed.... Google appears to be working!
Well played ;-)
Thanks Gardner, Ill be sure to check it out.