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Linux Serial Port Issues

Mark Erbaugh <mark.election@...>

I am building a Raspberry Pi 4 to serve as a portable data terminal. For more information, see KM4ACK’s YouTube video and his pi-build script on GitHub (www.github.com/km4ack/pi-build).

The rig is an Elecraft KX3. The interface is a Timewave Navigator. The Navigator provides multiple FTDI USB/serial ports, one of which provides a CAT interface to the rig. Just to eliminate the Navigator as the problem, I also tried the standard Elecraft KXUSB interface cable, which also provides a FDTI USB serial port. (the Navigator and KXUSB were not connected at the same time).

With the interface cable plugged in to the RPi, I did dmesg and saw that the serial ports were correctly associated with the FTDI drivers.

I did the “usermod -a -G dialout pi” to add my local user (pi) to the dialout group for access to the serial ports.

FLRig is able to access the CAT interface and control the KX3.

I exit FLRig and launch WSJT-X. Under rig setup, I specify the correct serial port (/dev/ttyUSB0) and baud rate. I click the Test CAT button and it doesn’t change color – neither red nor green. Sometimes, this disables the Test PTT button, but when it doesn’t toggling the Test PTT button toggles Tx on the KX3.

Back on the WSJT-X main screen, the frequency mirrors the KX3’s frequency, changes to frequency on the radio change in WSJT-X and vice versa, but the “fake it” split mode doesn’t work.

This is with WSJT-X 2.1.10 which was built from source code. The RPi 4 is running Raspian Buster which has been updated with the latest changes.

For comparison, I installed WSJT-X 2.1.12 from the .deb file on the website onto a desktop computer running Linux Mint 19. I saw the same problems. Again FLRig worked fine.

I did various things such as changing the owner of the serial ports to the local user and changing the group of the serial ports to the local user – no change.

I started WSJT-X using sudo and the Test CAT button worked and turned green, so I think there may still be a permission issue.

Thanks for any suggestions, 73,

Mark, N8ME

Karza <kari.sillanmaki@...>

#9787

Hi Mark,

On 11.5.2020 15.41, Mark Erbaugh wrote:

..

I did the “usermod -a -G dialout pi” to add my local user (pi) to the dialout group for access to the serial ports.

You issuded "sudo usermod ...", right?
After that, did you log off and on again?
Does command 'id' show 'dialout' as one of your groups now?

What does command 'ls -ltr /dev/tty*' show when you have
the KUSB cable connected?

Back on the WSJT-X main screen, the frequency mirrors the KX3’s frequency, changes to frequency on the radio change in WSJT-X and vice versa, but the “fake it” split mode doesn’t work.

What exactly does not work? How did you test?

I did various things such as changing the owner of the serial ports to the local user and changing the group of the serial ports to the local user – no change.

No need to do anything like that.

73's de Kari, oh2gqc

Mark Erbaugh <mark.election@...>

#9790

Kari,

Thanks for the reply. See below.

You issuded "sudo usermod ..", right?

After that, did you log off and on again?

Does command 'id' show 'dialout' as one of your groups now?

I’m not sure I had logged off and back on, but I did just now.

Id shows that pi is a member of the dialout group

What does command 'ls -ltr /dev/tty*' show when you have

the KUSB cable connected?

crw-rw---- 1 root dialout 188, 0 May 11 10:19 /dev/ttyUSB0

What exactly does not work? How did you test?

I retested, and it seems the only thing not working is the Test CAT button.

73,

Mark

Bill Somerville

#9791

On 11/05/2020 15:30, Mark Erbaugh wrote:

Kari,

Thanks for the reply. See below.
You issuded "sudo usermod ..", right?
After that, did you log off and on again?
Does command 'id' show 'dialout' as one of your groups now?
 
I’m not sure I had logged off and back on, but I did just now.

Id shows that pi is a member of the dialout group
 
What does command 'ls -ltr /dev/tty*' show when you have
the KUSB cable connected?
 
crw-rw---- 1 root dialout 188, 0 May 11 10:19 /dev/ttyUSB0
What exactly does not work? How did you test?
I retested, and it seems the only thing not working is the Test CAT button.

73,

Mark

Hi Mark,

if the "Test CAT " button is not working then you should be getting an error message window. What does that error message window say, including the text revealed by the "Show Details ..." button?

73
Bill
G4WJS.

Mark Erbaugh <mark.election@...>

#9808

No error message. The only thing that happens is that the Test PTT button becomes active.

Show quoted text

On May 11, 2020, at 11:23 AM, Bill Somerville <g4wjs@...> wrote:

On 11/05/2020 15:30, Mark Erbaugh wrote:
Kari,

Thanks for the reply. See below.
You issuded "sudo usermod ..", right?
After that, did you log off and on again?
Does command 'id' show 'dialout' as one of your groups now?
 
I’m not sure I had logged off and back on, but I did just now.

Id shows that pi is a member of the dialout group
 
What does command 'ls -ltr /dev/tty*' show when you have
the KUSB cable connected?
 
crw-rw---- 1 root dialout 188, 0 May 11 10:19 /dev/ttyUSB0
What exactly does not work? How did you test?
I retested, and it seems the only thing not working is the Test CAT button.

73,

Mark
Hi Mark,

if the "Test CAT " button is not working then you should be getting an error message window. What does that error message window say, including the text revealed by the "Show Details ..." button?

73
Bill
G4WJS.

Bill Somerville

#9809

Hi Mark,

so, to sure, the "Test CAT" button is not turning green, and yet the "Test PTT " button is becoming enabled. That should only happen if the "PTT Method" is not "CAT" or "VOX". What do you have "Settings->Radio->PTT Method" set to?

73
Bill
G4WJS.

On 11/05/2020 17:25, Mark Erbaugh wrote:

Show quoted text

No error message. The only thing that happens is that the Test PTT button becomes active.

On May 11, 2020, at 11:23 AM, Bill Somerville <g4wjs@...> wrote:
On 11/05/2020 15:30, Mark Erbaugh wrote:
Kari,

Thanks for the reply. See below.
You issuded "sudo usermod ..", right?
After that, did you log off and on again?
Does command 'id' show 'dialout' as one of your groups now?
 
I’m not sure I had logged off and back on, but I did just now.

Id shows that pi is a member of the dialout group
 
What does command 'ls -ltr /dev/tty*' show when you have
the KUSB cable connected?
 
crw-rw---- 1 root dialout 188, 0 May 11 10:19 /dev/ttyUSB0
What exactly does not work? How did you test?
I retested, and it seems the only thing not working is the Test CAT button.

73,

Mark
Hi Mark,

if the "Test CAT " button is not working then you should be getting an error message window. What does that error message window say, including the text revealed by the "Show Details ..." button?

73
Bill
G4WJS.

jgrantham@...

#9814

If you have FLRig working, launch that and then set WSJT-x to use FLRig as the radio. Works great.

Get Outlook for iOS

Show quoted text

From: WSJTX@groups.io <WSJTX@groups.io> on behalf of Mark Erbaugh <mark.election@...>
Sent: Monday, May 11, 2020 7:41:33 AM
To: WSJTX@groups.io <WSJTX@groups.io>
Subject: [WSJTX] Linux Serial Port Issues