Date   

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"

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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.



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

Grover Cleveland
 

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


Accessing USB devices in .net core

Charles Gallo
 

Hey Guys,
Playing with some code (real preliminary) that will require accessing the USB from .net core or the RPi (3B and later)

Anyone done so?  Tricks?  Examples?

--
73 de KG2V
Charles Gallo


Re: USB Codecs

Phil
 

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.

--

Regards,
Phil


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

Mark Griffith
 

If you changed your SSID and the password, your Pi won't be able to connect unless you reconfigure it.

You'll have to connect to the Pi somehow, like attaching an HDMI monitor and keyboard.

From the GUI click on the network icon in the upper right, and select your new WiFi and enter the password.
 
Then reboot.  It should pop up on your network.  If not, something else is the problem.

Mark
KD0QYN


On Sunday, August 30, 2020, 1:50:21 PM CDT, Grover Cleveland via groups.io <k7tp@...> wrote:


[Edited Message Follows]

Here is just one part of the issue:
The router was not physically changed but the names and passwords for the WiFi were.
The router's dhcp is working fine with everything else on the network.
With the new and correct supplicant information, no wifi comes up.
At the moment, with the ethernet connected directly to the router, the pi does not seem to bring it up on the network

Appreciating all your help folks.


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

David Lane
 

I had this issue.

You said you changed the names - do you mean the Hostnames? Check to make sure they are valid hostnames (that is what bit me). During the boot sequence (after hooking up all the cables etc) it spun waiting to connect because the hostname was invalid and something in the DHCP client didn’t like it, so it just timed out (eventually) and no IP address was assigned. 

That should all be recorded in your dmsg file. 

Good luck. 

On Aug 30, 2020, at 3:31 PM, N5XMT <dacooley@...> wrote:

Put a monitor and keyboard on one of the Pi's, log in and do sudo ifconfig -a

On Aug 30, 2020, at 11:48, "Grover Cleveland via groups.io" <yahoo.com@groups.io target=_blank>k7tp=yahoo.com@groups.io> wrote:
Here is just one part of the issue:
The router was not physically changed but the names and passwords for the WiFi were.
The router's dhcp is working fine with everything else on the network.
With the new and correct supplicant information, no wifi comes up.


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

N5XMT
 

Put a monitor and keyboard on one of the Pi's, log in and do sudo ifconfig -a

On Aug 30, 2020, at 11:48, "Grover Cleveland via groups.io" <yahoo.com@groups.io target=_blank>k7tp=yahoo.com@groups.io> wrote:
Here is just one part of the issue:
The router was not physically changed but the names and passwords for the WiFi were.
The router's dhcp is working fine with everything else on the network.
With the new and correct supplicant information, no wifi comes up.


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

N5XMT
 

Doesn't make much sense if a clean install or Ethernet connection doesn't show up.  Is the PC You are using still on the old subnet so it can't see anything on the router?  Is WiFi enabled on the router?
When you say they don't show up, have you logged into the router to see what connected devices there are, or are you just trying the old IP addresses?

On Aug 30, 2020, at 09:06, "Grover Cleveland via groups.io" <yahoo.com@groups.io target=_blank>k7tp=yahoo.com@groups.io> wrote:
I need your help, Pi gurus.
After I changed my router none of the PI's that I use for Ham Radio show up.
I know what you are about to say - you have to change the settings for the network.
Here's what I have done without luck:
  1. Reinstalled the images to micro sd cards
  2. Changed the wpa_supplicant file to the appropriate settings
  3. Created the blank ssh file
  4. Installed the SD cards and rebooted each device
  5. Ran an ip scanner
  6. Connected an ethernet cable to my pc from the devices.
  7. Connected the Pi's directly to the router with Ethernet

Nada. - nothing

The PI's are 3B, 4 (4gb), and a jumbospot.
Thanks in advance
K7TP


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

Grover Cleveland
 
Edited

Here is just one part of the issue:
The router was not physically changed but the names and passwords for the WiFi were.
The router's dhcp is working fine with everything else on the network.
With the new and correct supplicant information, no wifi comes up.
At the moment, with the ethernet connected directly to the router, the pi does not seem to bring it up on the network

Appreciating all your help folks.


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

Marty Hartwell
 

Hi

Another way to hear that is, you changed you ISP or the old router needed to be

changed out with another one.So I agree we need more information.


Marty kd8bj


On 8/30/20 11:55 AM, Mark Griffith via groups.io wrote:
Well, you may have unintentionally opened a big can or worms.

When you say you "changed my router", what exactly did you change?

What operating system (OS) software are you installing on the Raspberry Pi?  Raspbian Buster I hope.

If you have installed a standard version of Raspbian, and are connecting to your network with Ethernet cables, then there is nothing that you need to do.  If you are trying to use WiFi, then you just need to modify one file and it should connect.

The issue is what did you do to the router?  Make changes in DHCP?  SSID name?  Password?

Mark
KD0QYN


On Sunday, August 30, 2020, 11:06:52 AM CDT, Grover Cleveland via groups.io <k7tp@...> wrote:


I need your help, Pi gurus.
After I changed my router none of the PI's that I use for Ham Radio show up.
I know what you are about to say - you have to change the settings for the network.
Here's what I have done without luck:
  1. Reinstalled the images to micro sd cards
  2. Changed the wpa_supplicant file to the appropriate settings
  3. Created the blank ssh file
  4. Installed the SD cards and rebooted each device
  5. Ran an ip scanner
  6. Connected an ethernet cable to my pc from the devices.
  7. Connected the Pi's directly to the router with Ethernet

Nada. - nothing

The PI's are 3B, 4 (4gb), and a jumbospot.
Thanks in advance
K7TP

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