AIOC radio testing with DigiPi - need suggestions

[Scott]

Hello

I have a Pi Zero 2W with 8 GB SD card and the current release Digipi image. 2.0-1

I have it connected to a AT&T home WI fi with no issues. (another post on this later) 

I have a USB hub with GPS receiver, USB A to C adapter and USB C to USB C cable with ferrites. 

Finally I have the USB C cable connected to a home soldered AIOC card connected to a Baofeng 82HP. 

The antenna is a mag mount about 20" away from the PI/Digirig system. Call connections for power, USB hub, if used mini HDMI adapter are equipped with ferrites. 

Tuned to 144.390 I can see received APRS packets on the packet display  on the Digipi. So I know I am receiving packets. That's fine. 

However when using webchat , with send position or send message I am not seeing any packets sent from the radio. That is I see the RED (?) led on the AIOC light up as if I am transmitting but I do NOT see any indicator on the radio that it is being triggered to send any packets. 

I have tested this with several radios : 

Baofeng 5RM (BK, JP); Baofeng M5R; Baofeng UV-82HP: Baofeng BF-F8HP (JP)
Radtel RT-900 (BK)
Kenwood TH-F6 (BK);
Radioddity GD-88 (BK)
Anytone AT-878UVII + (SKS, BK, JP); Anytone AT-878UV (BK)

The pattern is the same. 

Is there a defined process from the Digipi UI that is recommended for testing APRS packet transmission from the DigiPi to a attached radio. In other words is there a better approach than what I am doing?

I did verify that the AIOC card has no shorts. I will also order another pre-made AIOC card just in case I blew it. I made 3 of them. 

Thanks

Scott Sheppard KJ4ZZB

[Edward Matarazzo]

Did you flash the aioc?

Edward Matarazzo KE8GIM

---

From: 'Scott' via DigiPi <dig...@googlegroups.com>
Sent: Wednesday, May 13, 2026 7:01:10 PM
To: DigiPi <dig...@googlegroups.com>
Subject: [DigiPi] AIOC radio testing with DigiPi - need suggestions

 

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[Craig]

If the AIOC flashes, DigiPi is trying to key the rig.

Normally I'd suggest making sure the prongs are fully inserted as there
are interference issues with some combos.

Ultimately the PTT wire isn't being "grounded out".  you might try touching
PTT to ground to make sure it goes into transmit.

I'm concerned you've got a bad schematic if all three fail?

Webchat beacons are a good diagnostic, however I also tell people to
start "APRS Digipeater" and wait exactly 8 seconds for the beacon/transmit.

let us know please,
-craig
KM6LYW

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