No audio via AIOC?

[mikel...@gmail.com]

Hey Guys,

Not sure what more to look at — maybe I’ve just got a DOA AIOC.

PTT keys, but nothing is xmitted. Don’t seem to receive any APRS packets either. 

Have reinstalled DigiPi, changed Baofengs, changed antennas, and usb cables. Good separation between Pi and HT. Ferrite beads in place. 

Running on Raspberry Pi 3B+

Config file attached. 

[Craig]

so no transmit audio, ptt keys and receive audio is unknown.

is a baofeng mini?  we're getting reports the AIOC pins don't seat well in those.

remove your ADEVICE from the .conf file.  DigiPi uses the first card listed in "cat /proc/asound/cards",
using the ALSA_DEVICE=0 environment variable.  (see direwolf.tnc.sh for more info).

PktLog should show us how/if audio devices are being used for aprs.


... and let us know, thanks,
-craig
KM6LYW

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—Mike

Michael Lord-Imaizumi
mikel...@gmail.com
619-840-4715

N5MCL EL09wr

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[mikel...@gmail.com]

Remember the Pi 3b+ has its own sound card. Thoughts?

—Mike

Michael Lord-Imaizumi
mikel...@gmail.com
619-840-4715

N5MCL EL09wr

On Jan 8, 2026, at 7:38 PM, Craig <km6...@gmail.com> wrote:

 so no transmit audio, ptt keys and receive audio is unknown.

[mikel...@gmail.com]

Remember the Pi 3b+ has its own sound card. Thoughts?

Radio is AR-5RM

[Michael Lord-Imaizumi]

All right folks. I’m gonna sheepishly tell you what I stumbled upon…

The Baofeng still had a positive offset enabled!  So every time it was keyed on VFO, the actual transmitting frequency was changed (of course)! I’m successfully transmitting now (successfully sent myself sms text messages). 

I still don’t seem to be decoding received packets however — I’ve already adjusted the squelch to very low (1) and even off (0) to no effect. I see the receive LED on the HT light up, but nothing in PktLog (see below).

—Mike

Michael Lord-Imaizumi
mikel...@gmail.com
619-840-4715

N5MCL EL09wr

---------------------------------

Reading config file /run/direwolf.tnc.conf

Could not extract card number or name from default

Can't automatically find matching HID for PTT.

Audio device for both receive and transmit: default  (channel 0)

Channel 0: 1200 baud, AFSK 1200 & 2200 Hz, A+, 44100 sample rate / 3, Tx AX.25.

Initializing GPIO common structure

Opening GPIO line 16 on chip /dev/gpiochip0

Using /dev/hidraw0 GPIO 3 for channel 0 PTT control.

Ready to accept AGW client application 0 on port 8000 ...

Ready to accept KISS TCP client application 0 on port 8001 ...

DNS-SD: Avahi: Announcing KISS TCP on port 8001 as 'Dire Wolf on digipi'

Virtual KISS TNC is available on /dev/pts/0

Created symlink /tmp/kisstnc -> /dev/pts/0

DNS-SD: Avahi: Service 'Dire Wolf on digipi' successfully registered.

Now connected to IGate server noam.aprs2.net (2001:19f0:b001:999:5400:4ff:feb0:e9a7)

Check server status here http://[2001:19f0:b001:999:5400:4ff:feb0:e9a7]:14501

[ig] # aprsc 2.1.19-g730c5c0

[ig] # logresp N5MCL-2 verified, server T2CAEAST

Attached to KISS TCP client application 0 on port 8001 ...

Ready to accept KISS TCP client application 1 on port 8001 ...

[ig] N5MCL-2>APDW18:!R?KI`5_C?&  ! DigiPi http://digipi.org/

[0L] N5MCL>APZ100,WIDE1-1::SMS      :@6198404715  Howdy!!!{3678

[0L] N5MCL>APZ100,WIDE1-1:@090540z2943.76N/09809.45WlDigiPi http://digipi.org/

[0L] N5MCL>APZ100,WIDE1-1::SMS      :@6198404715  Howdy!!!{3678

[0L] N5MCL>APZ100,WIDE1-1::SMS      :@6198404715  Howdy!!!{3678

[0L] N5MCL>APZ100,WIDE1-1,WIDE2-1::SMS      :@6198404715 Howdy again{3680

[0L] N5MCL>APZ100,WIDE1-1,WIDE2-1::SMS      :@6198404715 Howdy again{3680

[0L] N5MCL>APZ100,WIDE1-1,WIDE2-1::SMS      :@6198404715 Howdy again{3680

[0L] N5MCL>APZ100,WIDE1-1,WIDE2-1::REPEAT   :ld SMS{3681

[0L] N5MCL>APZ100,WIDE1-1,WIDE2-1:@090552z2943.76N/09809.45WlDigiPi http://digipi.org/

[0L] N5MCL>APZ100,WIDE1-1,WIDE2-1:@090552z2943.76N/09809.45WlDigiPi http://digipi.org/

[0L] N5MCL>APZ100,WIDE1-1,WIDE2-1::REPEAT   :ld SMS{3681

[0L] N5MCL>APZ100,WIDE1-1,WIDE2-1:@090554z2943.76N/09809.45WlDigiPi http://digipi.org/

[0L] N5MCL>APZ100,WIDE1-1,WIDE2-1::REPEAT   :ld SMS{3681

On Jan 8, 2026, at 8:36 PM, mikel...@gmail.com wrote:

Remember the Pi 3b+ has its own sound card. Thoughts?

[mikel...@gmail.com]

I can see that the Baofeng is receiving APRS, but nothing is making it DigiPi (no Rcv light activity) on the screen. Thoughts?

—Mike

Michael Lord-Imaizumi
mikel...@gmail.com
619-840-4715

N5MCL EL09wr

On Jan 8, 2026, at 8:36 PM, mikel...@gmail.com wrote:

Remember the Pi 3b+ has its own sound card. Thoughts?

[Craig]

Hi Mike,

squelch off/zero

try 25/50/75% volumes on the baofeng volume knob

the 'feng is a poor  receiver in general, so we need to give it all the help we can

-craig
KM6LYW

[mikel...@gmail.com]

Will do. Thx. 

—Mike

Michael Lord-Imaizumi
mikel...@gmail.com
619-840-4715

N5MCL EL09wr

On Jan 9, 2026, at 3:30 PM, Craig <km6...@gmail.com> wrote:

 Hi Mike,

[mikel...@gmail.com]

Alright folks, another embarrassing admission that I will share for others’ benefit/entertainment. 🤣 

My dumb ass had R-CTCSS enabled!!

So, now:

• RX/TX Offset = OFF
• R-CTCSS = OFF
• T-CTCSS = OFF
• B/W = Wide
• SQL = 1
• Volume Knob = 60%
• (PktLog was first reporting Audio Level too high/hot with knob at 90%)

And it’s working like a charm!!!

73!

—Mike

Michael Lord-Imaizumi
mikel...@gmail.com
619-840-4715

N5MCL EL09wr

On Jan 9, 2026, at 3:43 PM, mikel...@gmail.com wrote:

Will do. Thx. 

[Mike Backus]

Mike, 

Every one of us has been there. Anyone that says they have not is either lying to you or lying to themselves. 

Good work sticking with it and tracking down the problem.  

Mike KB9ZDD

[mikel...@gmail.com]

Mike,

 

Yeah, that was a big part of the reason I shared… despite my slight embarrassment.

 

73,

 

—Mike

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