ASL3 + DigiRig Mobile

AllStarLink
1

Setup Information

Use sudo asl-show-version to obtain this information from the console or SSH

Asterisk Version: 22..x.y+asl3-3.n.m
ASL3 Version: 3.x.y

Allstar node issue

Setup

  • Raspberry Pi 4 running ASL3

  • Node: 68967

  • Radio: Yaesu FT-2900R

  • Interface: DigiRig Mobile

  • Connection:

    • RX audio: rear speaker jack → DigiRig
    • TX audio: DigiRig → front mic jack
    • USB: Pi ↔ DigiRig

What works

  • Node starts and exists
  • Can connect to nodes (e.g., 2000)
  • USB audio device detected (aplay -l)
  • RX audio confirmed (RxAudioStats changes)
  • Serial port present: /dev/ttyUSB0
  • PTT confirmed working via Python using DTR (keys radio reliably)

What does NOT work

  • No COS change in SimpleUSB (carrierfrom=usb or usbinvert)
  • No TX using SimpleUSB (Flash does not key radio)
  • Attempting to hook external PTT scripts into rpt.conf caused Asterisk to exit

Key observation

  • DigiRig presents:

    • audio via USB :check_mark:
    • serial control via /dev/ttyUSB0 :check_mark:

  • It does not expose CM108 GPIO (no usable COR/PTT via hidraw)

Problem

  • app_rpt / SimpleUSB expects GPIO-based PTT/COR
  • DigiRig provides serial PTT (DTR/RTS)

:backhand_index_pointing_right: These control methods do not align

Question

What is the supported method in ASL3 to:

  • Use USB audio for RX/TX
  • Use /dev/ttyUSB0 (DTR) for PTT
  • Use audio-based RX detection (since no COR line)

WITHOUT modifying hardware?

Goal

Use DigiRig Mobile with ASL3 + FT-2900:

  • no VOX
  • no hardware mods
  • no GPIO wiring
2

If the Digirig doesn’t expose the GPIO pins from the CM108/119 then you’re not going to be able to signal the radio directly without modification. ASL does not support PTT via serial.

3

DigiRig does expose the needed GPIO pins internally. the designer was sure it would be handy! :grin:

the GPIO pins are routed to thru-holes on the pc board and i have seen a post that one wire jumper is all that is needed to get all the hardware signalling set up

have a look https://www.youtube.com/watch?v=RYtGDxKNouc

let us know how it goes ..

4

He said he wanted not to modify it. A DigiRig was built for digital modes where the radio is controlled over a CAT connection. Repeaters and ASL work fundamentally differently.

5

the described modification is purported to allow the DigiRig to be used both for digital modes and ASL. as best i could tell (schematic), the jumper allows "normal" (serial port) signal change and audio chip signal change. it's a parallel circuit hookup, so no application conflict.

there will be no CAT offered in ASL service with this configuration - use SimpleUSB interface method.

also: a removable jumper isn't exactly a "hardware mod" in my book. although it will be necessary

6

I understand all that. My point was the OP didn't want to modify the adapter.

7

Well, i did not want to modify the digirig, but I guess I am going to take another look at that option.