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Topic: Software DTMF (Read 1 time) previous topic - next topic


Good evening!

Is there a software implementation of encoder/decoder DTMF for Arduino?



DTMF = Dual Tone Multiple frequency

To decode you need an integer FFT to determine the frequencies
To encode a signal in software is more difficult as the Arduino has no analog out, so you need extra hardware and if you buy extra HW why not a DTMF chip directly ...

What is your project/goal with the DTMF? can you tell us more? maybe there are other solutions.

Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)



Try tone library, it works

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