Re: image update failure

Basil Gunn

John Spoonhower <> writes:

again thanks for the help.
I didn't bother to download the last image. I found the problem is fixed by
simply using alsamixer and the settings you mention.
Glad to hear you have things working!!

The ./ script runs OK (packets seen on too on port
udrc 1.
I originally made this script as a quick test for packet using any of

I still have to fix up the location finding via gps as on the udrc II I
have a BU-353S4 usb gps not the draws device. Although gpsd is running just
fine, the position data parsing provided in is looking for NMEA
sentences, while I am fairly certain my device is not NMEA by default.
I wanted the script to work for UDRC/UDRC II hats ie. without
the on board GPS so I just conditional'ed the GPS stuff based on hat
type. Please hack this script to make it do what you want. I have both
gpsd & nmea functions in that script.

After that I will takeon the APRX install....
Yes, APRX is the way to go for APRS gating/digipeating.

73, John

On Sun, Oct 6, 2019 at 8:02 PM Basil Gunn <> wrote:

I verified that the following method also works.
Copy the following alsa control values from your working image,
you can read them by running

LO Driver Gain
ADC Level

Boot your new image and run:
cd bin
sudo su

Now run alsamixer and set LO Driver Gain, PCM & ADC Level. To make
things more convenient you could use an editor and set the 3 values in
the script. They are the first 3 levels set.

Verify by running one more time.


John Spoonhower <> writes:

Thanks. I will give this a try.
On a somewhat different topic...I notice in that in the
aprs symbols are listed. I do not see sending a symbol implemented in
script. Is this fairly straightforward to add ?

On Sun, Oct 6, 2019 at 11:17 AM Basil Gunn <> wrote:

I used a new image (nwdr14) with a UDRC II and it worked fine. I will
release that image today. The only thing I changed from the scripts was
to select discriminator out using the alsa commands. You can do it from
the alsamixer gui as well.

sset 'IN1_L to Left Mixer Positive Resistor' '10 kOhm'
sset 'IN1_R to Right Mixer Positive Resistor' '10 kOhm'

Since you have a working configuration why not save it to a file &
compare it with the configuration you are using with the new image.
ie. save /boot/config.txt, alsa-show, ax25-status -d

You could try a transmit test to see what that gives you
cd n7nix/debug
./ -P udr1 -p

Remember that on a UDRC II the mDin6 connector is port 1 not port 0.

I notice that you have manually edited /boot/config.txt. I did not
manually edit any files for my UDRC II test.


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