Found an email from Doug Crompton from the beginning of this year where he mentions this how-to he wrote on using the asterisk dialplan to capture and act on non-defined DTMF strings. I haven't looked at it in much detail but a quick glance looks like it could be used for your purposes.

http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/Allstar_extended_functions_using_autopatch.pdf

Brett KQ9N

On Sun, Nov 13, 2016 at 11:31 PM, Skyler F <electricity440@gmail.com> wrote:

Is it possible to parse DTMF strings without an individual command for each possible DTMF code? I would like a way to switch the frequency of a transceiver with serial frequency input (dra-818) via DTMF string. 

I have not thought of a way to customize DTMF behaviour and not have static codes. This is a standard node, not remote base. 

Here is an example of what I would like to do: 

*98145145 = Change frequency to 145.145 MHz

*97100 = Change CTCSS to 100.0 Hz

I Do NOT have to do this through RPT.Conf. If anybody can tell me a way of getting RAW DTMF data through shell, that would be really great!

73

Skyler KD0WHB

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