Yeah, it¡¯s a pretty common issue. ?After I posted basically the same exact question a few weeks ago, seen it raised again at least once before yours. ?At least you now know what¡¯s causing it and that it¡¯s relatively easily fixable. ?I should have the Fe-Pi clone here is a couple more days. ?Apparently it¡¯s a non-issue when you use a GPIO audio device instead of USB. ?Once I got it stable, it¡¯s been rock solid thigh. ?Enjoy your setup. ?:-)?
11 Max Pro
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On Sep 24, 2021, at 5:25 PM, Don Rolph <don.rolph@...> wrote:
?
My thanks to JK and David Ranch.
The dreaded RFI seems to strike again.
I have beads on every line.
I turn the transceiver off.
System is stable. ?beacon triggers at appropriate intervals.
Power up transceiver and these failures occur.
Does not happen with Raspberry PI 3, but it looks like PI Zero is more sensitive.
Ok, now to scratch my head and figure out?how to get enough shielding.
Thanks!
Hello Don,
OK I have DINAH working smoothly on a Raspberry PI
3 running direwolf and all is working well.
I have now built from scratch on PI Zero? (PI3 compiles
don't always work o PI Zero)? and I get the following
errors:
Audio input device 0 error code -19: No such device
Audio input device 0 error code -77: File descriptor in
bad state
Audio input device 0 error code -77: File descriptor in
bad state
Could not open /dev/hidraw0 for write, errno=2
ERROR: ?PTT for channel 0 has failed.? See User Guide for
troubleshooting tips.
Audio input device 0 error code -77: File descriptor in
bad state
Audio input device 0 error code -77: File descriptor in
bad state
Audio input device 0 error code -77: File descriptor in
bad state
Audio input device 0 error code -77: File descriptor in
bad state
Audio input device 0 error code -77: File descriptor in
bad state
Audio input device 0 error code -77: File descriptor in
bad state
Audio input device 0 error code -77: File descriptor in
bad state
Audio input device 0 error code -77: File descriptor in
bad state
Terminating after audio input failure.
These errors smack of RFI interference knocking out the DINAH sound
device.? To confirm, once this error pops up, look at the output of
"dmesg" and see if you have a USB reset and your soundcard is
"re-discovered".? If that's happening, you need to resolve the RFI
issue.? Try and and ALL of the following:
?? - Check to confirm the SWR on your antenna is low
?? - Lower the transmit power on your radio as a test
?? - Move the antenna farther away from the Rpi.? Farther the
better.
?? - Put ferrites on *all* cables going in/out of the Rpi, the radio
(audio cables, power, etc),
--David
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