Cesar,
The particular setup appears to use the GPIO pin 12 on the Pi board for PTT, I don’t think app_rpt software supports using the Pi GPIO pins for PTT.
Generally from what I understand, the app_rpt software uses a GPIO pin on the USB sound fob.
The diagram you provided appears to be for some other software platform which supports using the Pi GPIO pin for PTT such as the Svxlink or OpenRepeater project.
Check out the following USB sound fobs that will work.
http://www.masterscommunications.com/products/radio-adapter/ra25.html
https://dmkeng.com/URI_Order_Page.htm
Or buy a really cheap sound fob from here.
https://www.ebay.com/itm/Free-driver-USB-Sound-Card-CM108-USB-Sound-Card-Chip-Blue-J3J1/113783638459?hash=item1a7e0889bb:g:pOAAAOSwfx9dA~oc
Then modify it yourself.
http://www.garydion.com/projects/usb_fob/
Marshall
···
From: Cesar Gonzalo via AllStarLink Discussion Groups [mailto:noreply@community.allstarlink.org]
Sent: Monday, January 27, 2020 2:12 PM
To: ke6pcv@cal-net.org
Subject: [AllStarLink Discussion Groups] Help setting up USB Sound with vox

Cesar_Gonzalo
January 27
I bought it cause I saw this diagram.
Thought any cheap usb sound card will do it.
Thanks.
I’ll look for one with that specs.
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KE6PCV ASL Admin
January 27
Cesar, I am not sure what you mean by “cheap usb sound card” You need a USB audio sound fob with a specific chip that is supported by app_rpt. It needs to be one of the following CM108, CM119 or CM119B ’ Look for USB sound fobs with one of these chips. 73 Marshall - ke6pcv ··· (click for more details)
Previous Replies

KE6PCV ASL Admin
January 27
Cesar,
I am not sure what you mean by “cheap usb sound card”
You need a USB audio sound fob with a specific chip that is supported by app_rpt.
It needs to be one of the following CM108, CM119 or CM119B ’
Look for USB sound fobs with one of these chips.
73
Marshall - ke6pcv
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Cesar_Gonzalo
January 27
Hi I’m new and got stuck setting up the node
Hardware :
-Rapberry Pi 4
· Cheap USB Sound Card
· Baofeng UV5
· Easy Digi KF5INZ
·
I guess my node is set up , I can see the green on the nodes list.
Problem , I do not need the cos or ptt thing or modify a usb sound , is it possible just to configure the vox to handle the PTT .
I know all the pros and cons about using the VOX, but for now that’s all what I need
when running simpleusb-tune-menu :
Active simpleusb device stanza : [USB]
but then I get a message " Device usb currently not active"
Thanks For the help
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