Problems running 2.0

[SGold]

I have had two challenges, first of which I "think" I have resolved:

1.  The AOIC would fail and no longer show as connected as soon as I tried to connect DigiPeater or other outgoing service but would show up before then.  I went in to raspi-config, and set the IC2 interface to operate, and that seemed to resolve the failure when starting a service.

2.  WebChat does not function, but instead I get the message:  "Unable to connect to WebChat service, please ensure service is enabled.

Direct link: http://192.168.1.103:8055" 

Welcome any thoughts on either - not sure if I am doing something incorrectly and not sure how to troubleshoot it.

Steve

[SGold]

I am wrong about #1 fixing the issue - the AOIC interface fails as soon as it tries to send a packet:

[ig>tx] N1RCN>APRS,RS0ISS*,qAO,KD4ADC-2::KD5JGD-2 :Hello from EL97 (Live)
[0L] KC3XXX-2>APDW18,WIDE1-1,WIDE2-1:}N1RCN>APRS,TCPIP,KC3GTC-2*::KD5JGD-2 :Hello from EL97 (Live)
Audio write error: No such device
Error preparing after error: No such device
Audio input device 0 error code -19: No such device
Audio write error: No such device

Wonder if this could be a RPi hardware issue?  I have swapped out AIOCs, and it still occurs.

[Craig]

Hi Steve,

This is RF getting to the USB cable.  A ferrite bead is required, ideally two passes.  In addition
you can relocate the antenna with coax, reduce power, or make sure the pi is not broad-side
to the antenna.

Audio input device 0 error code -19: No such device

If you're using an HT, the USB cable becomes the other half of the antenna.  The Pi doesn't like this.

... and let us know,
-craig
KM6LYW

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[SGold]

Thank you, Craig.

It is a Baofeng HT.  Thanks for the suggestion - I have two ferrites on each end of the data cable to the AOIC, are you suggesting adding loops in the beads?  And should I add ferrites to the power cable as well?

Thank you!

Steve 

[Craig]

It can't hurt to add beads to the power cable.  You might try a different bead too.

These seem to work for me,

    https://www.amazon.com/dp/B016FC066O

Without those beads, my baofeng setup locks up on transmit every time.  Yaesu HT's too.


Data operations best practices:

• Relocate antenna with coax
• Reduce power
• Change length of USB cable
• Ensure Pi is not broad-side to antenna
• Ferrite beads on cables and antenna feed point

if it helps,
-craig
KM6LYW

To view this discussion visit https://groups.google.com/d/msgid/digipi/bfc85c82-72cd-4fac-97a8-4ee8896674c0n%40googlegroups.com.

[SGold]

Thanks Craig - that did it!  I reduced power, moved the Pi, and swapped out the cable for one that originally came with a SDR and had ferrites, and it stopped failing/locking up on transmit!  I will be purchasing the ferrites you suggested.

Steve