Dropping Connections

[Joe Spears AF1E]

Hi Craig,

I am getting the following error.  Any suggestions?  Running V2.0.1 on a pi zero.  

Now connected to IGate server noam.aprs2.net (44.26.110.252)

Check server status here http://44.26.110.252:14501

[ig] # aprsc 2.1.19-g730c5c0
[ig] # logresp AF1E-2 verified, server T2LANE
[ig] AF1E-2>APDW18:!R<H?&9yu,&  ! DigiPi http://digipi.org/

Digipeater ANDMTN audio level = 16(4/3)    _||||||__
[0.3] KA9QJT-10>APX221,ANDMTN*,WIDE2-1:=3555.31N/08140.60W#PHG5160Brian: Collettsville NC Digi iGate<0x0d>
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Audio input device 0 error code -19: No such device
Terminating after audio device 0 input failure.

[Craig]

Yup, that's RF on the cables, killing the audio card.  Ferrite beads required.  Short
of that relocate antenna, add counterpoise, reduce power.... or wrap wires around
the biggest nail you can find.

In Syslog, you'll see the USB bus disabling the device, suggesting "EMI" as the problem.

best,
-craig
KM6LYW

Terminating after audio device 0 input failure. --
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[Joe Spears AF1E]

Thanks Craig.  Was concerned about that.  Unfortunately I was at a multi-school baloon launch when it acted up.  I'll add some ferrites to the cables.  I also made some fixes to the code to give the USB more stability with my IC-705.

Root Cause--Direwolf had no explicit audio device configured — it was relying on default device selection. When the USB devices re-enumerated for any reason, direwolf lost its audio handle and crashed with error -19.

Fix Applied--Added ADEVICE plughw:CODEC,0 to /home/pi/direwolf.tnc.conf — using the card name (CODEC) rather than a number so it finds the right device reliably regardless of how USB enumerates.

Joe AF1E

[Craig]

Hi Joe, that's worth a try (especially the device-by name), but -19 always means the audio 
device disappeared.

if there is only one audio device, enumeration doesn't come into play.  I also code it
so if there is more than one device, USB devices have priority.

cat /proc/asound/cards (or click SysInfo).

After a -19 error, there are NO audio devices, destroyed (locked up) by RF.

baloon sounds really cool!

-craig
KM6LYW

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