Re: A couple of interesting tidbits #draws #xastir #wsjtx #pulseaudio

Jack Spitznagel

Thanks for pointing this out John. I will putter around with Annaliese’s instructions… Exactly why I bought this little beast in the first place! Since my most of rigs are primarily ICOM, it will be interesting to mix it in with use of the built in sound systems of the 7100 and 7300. Also interesting to learn if trying this is not going to overload the Pi B 3+. RPi are cheap, so the ICOMs will probably be run by a cluster rather than with the DRAWS.


I still am struggling with getting an appropriate drive level for using fldigi and wsjtx on the IC-7000. Xastir/YAAC does work on the 7000 and all programs I have tried work fine on the FT-817, but properly configuring the DRAWS and IC-7000 for HF digital modes has bugged me since early December. My correspondence with Basil and Brian about that is here in the UDRC archive.


Love to know if there has been any “discovery” made about this issue.



Jack Spitznagel





From: <> On Behalf Of John D Hays - K7VE
Sent: Friday, April 12, 2019 13:10
Subject: [udrc] A couple of interesting tidbits #xastir #wsjtx #pulseaudio #draws


Here is a screenshot from K7UDR's remote base.  It runs a headless DRAWS™ HAT on a Raspberry Pi 3+.  I access it from about 60 miles away over VNC.

The left and right mini DIN-6 ports run independently via an install and configuration of Pulse Audio.  Pulse Audio is not installed on the DRAWS™ beta images and is in test mode at the moment.  Anna has instructions for setup at for the adventurous/experimenter.

On the left mini DIN-6 is an FT-817 hooked up to a dipole, with CAT control via USB port.  In the screen shot we are running WSJT-X. PTT is via CAT for this transceiver configuration.


On the right mini DIN-6 is an IC-706Mk2G. Which under CAT control over a second USB port.  This radio doesn't allow PTT over CAT (CI-V), so applications must support an alternative keying method.  Fortunately, direwolf supports PTT via GPIO on the Raspberry Pi/DRAWS™.  In the screenshot you will Xastir running, using gpsd for position and direwolf for the packet modem.   


In this configuration, both an HF datamode and Xastir/Direwolf are running simultaneously from one DRAWS™ HAT, using two attached radios.

Fldigi can access Pulse Audio natively, other applications are using ALSA mappings of Pulse Audio 'devices' for audio.

Screen Shot 2019-04-12 at 9.43.43 AM.png

Any application that uses direwolf, should be able to take advantage of this type of configuration for packet applications.   Data mode applications access either through native Pulse Audio support, or via Pulse Audio/ALSA mappings.




John D. Hays


J Spitznagel
Science River LLC

Join to automatically receive all group messages.