BTW. This, of course, only decodes one tone. To do DTMF it would have to be modified to decode 8 tones and then compare the amplitudes to figure out whether there's a DTMF tone there and if so which one it is.
Pete
BTW. This, of course, only decodes one tone. To do DTMF it would have to be modified to decode 8 tones and then compare the amplitudes to figure out whether there's a DTMF tone there and if so which one it is.
Pete