Date   

Re: TT4 delays about 15 seconds as KISS modem

David Ranch
 


This is a known behavior of the mkiss kernel module creating a one-time delay.  There are a few ways to address this (crc_force=1) this be it just be patient for your first connection attempt OR change the options used when the mkiss kernel module is installed.  This later approach is the way I do it on my system via my packetrig.sh startup script:

   http://www.trinityos.com/HAM/CentosDigitalModes/usr/local/sbin/packetrig.sh
   --

   #Attempt to set the crcmode to NONE :: this can also be done with kissparm's -c option
   echo -e "\nLoading mkiss kernel module with CRC-mode: none" >> $LOG 2>&1
   $MODPROBE -q mkiss crc_force=1 >> $LOG 2>&1
   --

--David
KI6ZHD


On 09/03/2020 10:26 AM, Bill AA6BD wrote:
I have a TT4 connected to a Raspberry Pi running PAT Winlink client and ax.25 and kissattach.  I can connect the TT4 to PAT client when I use the kissattach command.  After I power up my Raspberry Pi, the first time that I try to connect PAT to a gateway, there is about a 15 second delay when it seems nothing is happening, and then the TT4 issues a PTT and the radio connects to the gateway and all works as expected.

If I try again to connect PAT to the gateway, there is no delay.  The PTT happens almost immediately and the session proceeds.

Is there some setting in the TT4 or in the Raspberry Pi (PAT or ax.25 or kissattach?) that can reduce or eliminate the 15 second delay the first time?
--
Bill AA6BD


TT4 delays about 15 seconds as KISS modem

Bill AA6BD
 

I have a TT4 connected to a Raspberry Pi running PAT Winlink client and ax.25 and kissattach.  I can connect the TT4 to PAT client when I use the kissattach command.  After I power up my Raspberry Pi, the first time that I try to connect PAT to a gateway, there is about a 15 second delay when it seems nothing is happening, and then the TT4 issues a PTT and the radio connects to the gateway and all works as expected.

If I try again to connect PAT to the gateway, there is no delay.  The PTT happens almost immediately and the session proceeds.

Is there some setting in the TT4 or in the Raspberry Pi (PAT or ax.25 or kissattach?) that can reduce or eliminate the 15 second delay the first time?
--
Bill AA6BD


FoxTelem using USB Sound

Suryono Adisoemarta
 

Has anybody use a USB soundcard to decode using FoxTelem ?

On mine I can see it detected on starting FoxTelem.jar, but not shown / available on the dropdown source menu.

This is on Rpi 3B running headless

73 de Yono - YD0NXX


Dual purpose DMR hotspot and HF digimodes

Bryan Waller
 

Has anyone seen a build that uses say a Pi4b to work simultaneously as a DMR radio hotspot and to work HF digital modes? If not, can you think of any reason it would not work or would not be a good idea to attempt?

Bryan/KN4EBW


New participant and new with the Raspi

Julio Paredes - KW4WA
 

Hello everyone.
I'm using for the first time a Raspberry-Pi 4 that I want to use to do all the digital modes I'm involved with: Winlink, JS8, PSK31.
On learning how to use the Raspbian environment I encountered a problem:  I connected a set of earphones, connected to YouTube and opened a music video, but there is no sound.  Is there a need for High Z phones or something in the software that I need to do?
Thanks and 73,
JP, KW4WA


Re: Accessing USB devices in .net core

Brus-Per
 

Charles,

Are you trying to localize/find the USB ports and the devices connected to them or are you attempting to read/write to a specific port? I assume you already know that Raspbian (Debian/Linux) treats USB ports as any tty-device.

I'm sorry but when it comes to RPi:s I'm only using Golang so I can not be of much help when it comes to .net on the RPi.

Best,
Brus-Per, SM6EIK


Re: Direwolf - Audio Writer Error

David Ranch
 


Hello Fushigi,

I already replied to you back on Fri, 28 Aug 2020 09:41:16 -0700 about this issue.  Are you saying that with this .asoundrc file in place but having direwolf STILL configured to use "plughw:1,0", DIrewolf breaks?  Remember, you cannot run say Direwolf and another soundcard program using the same sound device at the same time.

--David
KI6ZHD



On 09/01/2020 09:45 PM, Ada via groups.io wrote:
Hello! I am using direwolf with xastir,  Firts I was using plughw:1,0 configuration and direwolf worked without any problem, but the problem is Alsa don't let me use the soundcard with other application like sox or qsstv then I change the setting in .asoundrc with dmix, direwolf starts normal same xastir but only let me transmit once and the second time I get this error:
 
Audio Writer Error: File descriptor in bad state
Audio write error: retry count exeeded
  
.asound file:
 
pcm.dmixer {
    type dmix
    ipc_key 1024
    slave.pcm "hw:1,0"
}
pcm.dsnooped {
    type dsnoop
    ipc_key 1025
    slave.pcm "hw:1,0"
}

pcm.duplex {
    type asym
    playback.pcm "dmixer"
    capture.pcm "dsnooped"
}
 
pcm.usb {
                 type plug
                 slave.pcm "duplex"
}

I think is a alsa problem and I need a configuration for my usb soundcard, I don't know


Direwolf - Audio Writer Error

Ada <fushigi_aries@...>
 

Hello! I am using direwolf with xastir,  Firts I was using plughw:1,0 configuration and direwolf worked without any problem, but the problem is Alsa don't let me use the soundcard with other application like sox or qsstv then I change the setting in .asoundrc with dmix, direwolf starts normal same xastir but only let me transmit once and the second time I get this error:
 
Audio Writer Error: File descriptor in bad state
Audio write error: retry count exeeded
  
.asound file:
 
pcm.dmixer {
    type dmix
    ipc_key 1024
    slave.pcm "hw:1,0"
}
pcm.dsnooped {
    type dsnoop
    ipc_key 1025
    slave.pcm "hw:1,0"
}

pcm.duplex {
    type asym
    playback.pcm "dmixer"
    capture.pcm "dsnooped"
}
 
pcm.usb {
                 type plug
                 slave.pcm "duplex"
}

I think is a alsa problem and I need a configuration for my usb soundcard, I don't know


Re: Reducing size of fldigi display to fit small screen on raspberry pi

bbillp
 

I’m sorry I don’t have the exact file name for you but there is a TXT file in /boot that contains the display parameters to adjust. Also, if you go to adafruit.com and look at any of their 5” or 7” hdmi displays there is a reference on the page to the same file with the parameters to adjust. I have a Pi-3 running WSJT-X and was able to adjust the parameters for a proper display on a WIMAXIT 10” hdmi.
Bill acj


Re: Screen size of fldigi on a small (3.5") gpio display

Mark Griffith
 

There is probably a minimum size for the application and the 3.5 inch screen is just too small.

You might get more help asking the FLDIGI application team.

Mark
KD0QYN


On Tuesday, September 1, 2020, 1:56:27 PM CDT, Charles Albert <mrcwa2@...> wrote:


I have properly installed a small display on the pi zero; it displays
perfectly on boot up and all the standard apps in raspian display
well; however, when I installed fldigi on the zero, the display is
oversized and only about 25% of the fldigi screen can be seen. Moving
the screen around I can see part of the top of the screen, but can't
see the bottom third.  This seems like a setting on fldigi needs to be
changed.  fldigi displays perfectly on a 5" hdmi screen on the pi 3B+
an on a 7" hdmi display. The fldigi loaded on the zero with no
problem. Any thoughts??




Screen size of fldigi on a small (3.5") gpio display

Charles Albert
 

I have properly installed a small display on the pi zero; it displays
perfectly on boot up and all the standard apps in raspian display
well; however, when I installed fldigi on the zero, the display is
oversized and only about 25% of the fldigi screen can be seen. Moving
the screen around I can see part of the top of the screen, but can't
see the bottom third. This seems like a setting on fldigi needs to be
changed. fldigi displays perfectly on a 5" hdmi screen on the pi 3B+
an on a 7" hdmi display. The fldigi loaded on the zero with no
problem. Any thoughts??


Re: None of my Pi's are showing on network _ HELP

N5XMT
 

Also edit config.text and uncomment "hdmi_force_hotplug=1"

Get BlueMail for Android
On Sep 1, 2020, at 04:18, km4ack <jason.oleham@...> wrote:

(The only small remaining issue is that VNC Connect says it can't display the desktop - more investigation to be done.)

SSH into the pi and run sudo raspi-config Under the advanced options, set the resolution and it should solve this issue.

73, de KM4ACK
YouTube


Re: USB Codecs

David Ranch
 


Hello Phil,

I don't have any experience of how the USB audio connection works on a FT991 but if the radio doesn't present anything adjustable in the alsa mixer, all those "audio" level settings are probably adjusted in the FT991 menus.  Anyway, this email list is focused on the Raspberry Pi and not X86 laptops as they are going to behave in different and unique ways.

--David
KI6ZHD



On 08/31/2020 04:21 PM, Phil wrote:
On 1/9/20 1:32 am, David Ranch wrote:

Hello Phil,

Going back to your first post, it seems you're doing this on "a Linux laptop" which I assume is running PulseAudio.

Thanks again David for your reply,

No, the laptop uses Alsa audio. Perhaps there's no reason for me to be concerned about the audio input level to the Raspberry pi? I just thought that others might be using a Raspberry pi and an FT-991A together and had found a way to create a level control.

By the way, the laptop runs under Kubuntu and the Raspberry runs under the standard Raspberry OS.



Re: None of my Pi's are showing on network _ HELP

km4ack
 

(The only small remaining issue is that VNC Connect says it can't display the desktop - more investigation to be done.)

SSH into the pi and run sudo raspi-config Under the advanced options, set the resolution and it should solve this issue.

73, de KM4ACK
YouTube


Re: USB Codecs

Phil
 

On 1/9/20 1:32 am, David Ranch wrote:

Hello Phil,

Going back to your first post, it seems you're doing this on "a Linux laptop" which I assume is running PulseAudio.
Thanks again David for your reply,

No, the laptop uses Alsa audio. Perhaps there's no reason for me to be concerned about the audio input level to the Raspberry pi? I just thought that others might be using a Raspberry pi and an FT-991A together and had found a way to create a level control.

By the way, the laptop runs under Kubuntu and the Raspberry runs under the standard Raspberry OS.

--

Regards,
Phil


Re: Configuring W3DJS V1.0 Direwolf questions.

David Ranch
 

Hello Dennis,

My latest progress on this Direwolf adventure: David, when I looked at your options I realized that maybe there was a 4th one. The FT-8** transceivers do have bit rates that can be adjusted to other than the default 4800 bps. I tried a few others and found that 38400 works with Direwolf! As soon as I hit that bit rate, the transmitter went into action.

Interesting.. so Direwolf is attempting to communicate to the radio at a default of 38400.  While I whole heartly recommend higher speeds like this for snappy rig control, 4800bps is usually the default on many radios.  At minimum, I feel Direwolf should output what speed it's trying to do CAT PTT control at.  On the longer term, this and other parameters needs to be configurable.

I've created an issue to track this:  https://github.com/wb2osz/direwolf/issues/290


Oddly, I couldn't receive a thing on the APRS frequency of 144.390 Mhz. It seemed to stop working when the transmitter started working. In the end, it was nothing to do with the Direwolf and more to do with hurricane Laura going by the region. The winds had knocked over my two meter antenna on the roof and grounded it. I couldn't see it until I went up there.

Ok.. that was problem #2 to solve and you've already fixed that.  Good.



At present am seeing my beacon on APRS.fi so, at long last, there is some progress. Now I have to study up on how all this APRS stuff works, I know almost nothing about it at this point. At least I am not seeing any red messages in Direwolf and am seeing lots of traffic.

https://aprs.fi/#!mt=roadmap&z=13&lat=27.2580&lng=-82.5063&timerange=3600&tail=3600

Ok.. good.


Thanks for all the help, sorry I was such a dummy. The Direwolf manual is a daunting piece of work and I have much studying to do.

No doubt there is a log of material in the Direwolf UserGuide and the other great documentation found in:

   https://github.com/wb2osz/direwolf/tree/dev/doc


If you're looking for an APRS Beginner's Guide, I host a copy of K9DCI's excellent guide here:

   http://www.trinityos.com/HAM/Aprs/APRS%20Beginner%20Guide%20-%20K9DCI%20Ver%205-1.pdf

--David
KI6ZHD


Re: Configuring W3DJS V1.0 Direwolf questions.

Dennis Blanchard
 

My latest progress on this Direwolf adventure: David, when I looked at your options I realized that maybe there was a 4th one. The FT-8** transceivers do have bit rates that can be adjusted to other than the default 4800 bps. I tried a few others and found that 38400 works with Direwolf! As soon as I hit that bit rate, the transmitter went into action.

Oddly, I couldn't receive a thing on the APRS frequency of 144.390 Mhz. It seemed to stop working when the transmitter started working. In the end, it was nothing to do with the Direwolf and more to do with hurricane Laura going by the region. The winds had knocked over my two meter antenna on the roof and grounded it. I couldn't see it until I went up there.

At present am seeing my beacon on APRS.fi so, at long last, there is some progress. Now I have to study up on how all this APRS stuff works, I know almost nothing about it at this point. At least I am not seeing any red messages in Direwolf and am seeing lots of traffic.

https://aprs.fi/#!mt=roadmap&z=13&lat=27.2580&lng=-82.5063&timerange=3600&tail=3600

Thanks for all the help, sorry I was such a dummy. The Direwolf manual is a daunting piece of work and I have much studying to do.

Dennis, K1YPP


Reducing size of fldigi display to fit small screen on raspberry pi

Charles Albert
 

I am using raspberry pi zero w with success, however, it is oversized
and I can't see the whole screen. Is there any quick and dirty way to
reduce the display so it fits a 3.5 inch screen?


Re: None of my Pi's are showing on network _ HELP

N5XMT
 

For the Pi3B that means the root partition of the SD card is bad/corrupt or cmdline.txt is pointing to the wrong device for the rootfs. 

On Aug 31, 2020, at 07:33, "Grover Cleveland via groups.io" <yahoo.com@groups.io target=_blank>k7tp=yahoo.com@groups.io> wrote:
Solved - somewhat.
This was a tortuous road to travel but I'm 2/3 there.
  • The Jumbospot had setup its own wifi hotspot on some unknown IP. This is what happens automatically when the Pi Zero can't log into the router (since things had changed). I found the new ip using an rf sniffer application then attached to it on the Jumbospot setup address. Then I could configure it for the current router settings. One down!
  • The Pi4 was trickier. I suspected that the eeprom on the board was corrupted or in a strange state. No one mentioned the Pi tool "imager.exe" which allows you to reset the onboard eeprom. Using that I could reload the current Buster OS. I could then attach to it using ssh. (The only small remaining issue is that VNC Connect says it can't display the desktop - more investigation to be done.)
  • The Pi3b stalls however during the boot process showing this line of text. --[ end Kernel panic - not syncing VFS: Unable to mount root fs on unknown block   - Can someone please explain that to me? I think it's hardware.
So all in all it was an interesting process. At times I was learning new things; at other times I was stumbling in the dark.

So I'll keep on truckin' and share any future successes. Thanks for all the advice. Learning as we go.

Grover K7TP


Re: USB Codecs

David Ranch
 


Hello Phil,

Going back to your first post, it seems you're doing this on "a Linux laptop" which I assume is running PulseAudio.   Is that correct?

--David
KI6ZHD


On 08/30/2020 09:58 PM, Phil wrote:
On 31/8/20 3:37 am, David Ranch wrote:

Different sound devices will have different names so that's perfectly fine.  I assume you're using Raspbian here but what does commands like "aplay -l" and "arecord -l" say?  Are you using vanilla ALSA or are you trying to use say PulseAudio, etc?

Thank you for your reply David,

I had already listed the Alsa audio devices but only the default device was shown. I decided to do an update and then turned the Raspberry pi off for the night. The next day and now the Burr-Brown codecs are listed so at least I can select the codecs that I previously had.

However I have a new problem, no capture control only an output control which does vary the transmitter power. AlsaMixer reports that "This device does not have any capture controls" . JS8CALL and Fldigi (as well as WSJTX, which I don't use) function but the input is a little high at 60dB. As I type this I now remember that was the case previously but the interface had it's own control which solved the problem.

So the question now is, how do I create a capture control? More Internet searching has not revealed an answer.


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