Thanks Pierre, that is just what I have, the RA-25 is connected to a USB of the Pi, running allstar software,
There may be a problem with what it is called … an “RF less node” has no radio, so I have seen them called “radio less nodes”
I guess it’s a matter of semantics …
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On 7/19/2020 18:49, Pierre Martel via AllStarLink Discussion Groups wrote:
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| Pierre_Martel
July 19 |
| - | - |Hi Don, welcome to the allstarlink support group.
I think what you are trying to do is to make a RF less node and not a radioless node as we think of it.Your goal is to take a pair of node with RA-25 audio adaptor and connected them into a speaker and a microphone with a PTT like switch?
In the allstarlink world we see that as a node with a radio interface. A radio less node is a node that have no audio interface at all. It is just a central place to connect multiple node that have limited bandwith. The radio less node will usely be into a high bandwith/resource site.
In your case you need to use the simpleUSB driver with the RA-25 as the interfacing mode to control the ra-25.
Here is the pinout of the ra-25
RA-25 DB9 Pinout:
1 - Right (Aux or Tone) Output
2 - Left (Main or Voice) Output
3 - COS Logic Input - (pull near ground required for valid input)
4 - CTCSS Logic Input - (pull near ground required for valid input)
5 - PTT Output
6 - Discriminator or Receiver Audio Input - (level controlled by potentiometer)
7 - Not Used - brought to a solder pad to be used optionally.
8 - Ground - (Digital and Analog)
9 - Not Used - brought to a solder pad to be used optionally.
You will need to connect the output speaker to pin 1 or 2 and pin 8 (ground) .You will need an amplified speaker set like for a computer. this will also gve you a way to control the volume.
Then you will connect the microphone you want to pin 6 and pin 8 (ground) and the PTT switch pin 3 (cor) since you wont be using a ctcss signal. I know this sound illogic as there is a PTT signal ( pin 5) But that signal is an output that is usely driving the TX of a radio or repeater. The COR pin (3) is an input and this tell the software that it has audio to send to the allstarlink network…
Hope this help a bit.
For the programing part It will be better to come back with question.
Pierre
VE2PF
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