[arm-allstar] radioless node dtmf

[Jay Urish]

Doug,

You are absolutely correct. My attitude is that everything from China is 
pure junk.

Maybe the real ones would be an option though.


On 3/5/19 11:18 PM, "Doug Crompton via ARM-allstar" wrote:
> Jay,
>
>    That's a good price but I would be leery of anything taged Motorola for
> this price. It is probably a clone and there is a lot of junk out there. It
> turns out using the Arduino in conjunction with the Yaesu mic's has a lot
> of advantages like being able to monitor your DTMF and also having four
> additional special function keys. It is actually a 4X5 matrix.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
>
> On Wed, Mar 6, 2019 at 12:10 AM "Jay Urish via ARM-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
>> Doug,
>>
>> Have you ever looked at the motorola mics? They do encode DTMF.
>>
>>
>> https://www.ebay.com/itm/Microphone-AARMN4026B-DTMF-for-Motorola-Radio-CDM1250-CDM1550-CDM1550LS-CDM750/292196846880?hash=item44084a0d20:g:8wsAAOSwdOlcXY~L
>>
>>
>>
>> On 3/5/19 8:55 PM, "Doug Crompton via ARM-allstar" wrote:
>>> We are about to release our complete radio-less node and in a production
>>> setting finding an inexpensive  DTMF mic that has real DTMF out and works
>>> well is almost impossible. The clones are often junk. We started off with
>>> Alinco mics and the ones offered on the Internet are Chinese clones and
>>> unreliable using DTMF. We ended up using a Yaesu mic and an Arduino to
>>> decode the voltage matrix from the mic and create DTMF tones. It works
>> very
>>> well but is not something the average user would want to do.
>>>
>>> If you are building your own on a "onesey" basis you should be able to
>> find
>>> a mic - Kenwood, Alinco, etc. that works. For a powered mic you need 5V
>> to
>>> the mic.  I know some say 8V but all you need is 5V and that is all you
>> are
>>> going to get over USB anyway. See the pin out for your particular mic.
>> Keep
>>> in mind that many mics do NOT encode DTMF.  Yaesu and icom especially.
>> They
>>> either send voltage levels or a data stream to the radio and the DTMF is
>>> created there. So not all mics will work for the DTMF audio directly out
>>> which you need. Levels are very important for DTMF. Go into the Asterisk
>>> client and observe the keys being decoded as you push them. They
>> obviously
>>> should all work. In some cases you may need to open the mic and set the
>>> DTMF level internally if there is a pot to do that.
>>>
>>>
>>> *73 Doug*
>>>
>>> *WA3DSP*
>>>
>>> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>>>
>>>
>>> On Tue, Mar 5, 2019 at 3:00 PM "Alan Matthews via ARM-allstar" <
>>> arm-allstar at hamvoip.org> wrote:
>>>
>>>> hi group
>>>>
>>>> a bit of a dumb question, but I'll ask anyway.
>>>>
>>>> I have just finished a radioless allstar node, is there anyway to use
>> DTMF
>>>> tones for linking. I'm using my icom mike from my 5100. The only way of
>>>> connecting as far as I can tell is via allmon.
>>>>
>>>> thanks Alan
>>>>
>>>>
>>>>
>>>> ---
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