IC-7300 with USB CAT control problem corrected in Beta 7 #draws #gpsd #fldigi #wsjtx

Julie McGrew

The goal was to control an IC-7300 with a USB cable and operate fldigi, wsjt-x, and JS8Call using the radio's sound card.  DRAWS received the audio fine, but would not control the radio. The IC-7300 was on ttyUSB0, but the command "stty -F /dev/ttyUSB0" returned the "device or resource busy" error.  Unable to find the culprit I installed lsof with this command:  "sudo apt-get install lsof" and ran:  "sudo lsof /dev/ttyUSB0".  The response showed that ttyUSB0 was being used by gpsd.

The Wiki directions for setting up gpsd read as follows:
Update, or create, the configuration file, /etc/default/gpsd, using a text editor, and set the following values:
DEVICES="/dev/ttySC0 /dev/pps0"

I checked the file and it looked like this:
#Configure gpsd
DEVICES="/dev/ttySC0 /dev/pps0"

So, I commented out USBAUTO="true" and rebooted DRAWS.  Now "stty -F /dev/ttyUSB0" reported the port speed at 115,200 so I issued "stty -F /dev/ttyUSB0 19,200" to get the speed to match what was set in fldigi and on the radio.  I created a symlink between /dev/ttyUSB0 and /dev/IC-7300 for a persistant name and now the CAT control works fine with fldigi, wsjt-x, and JS8Call (ver .13).

The question now becomes is it necessary to hotplug gpsd with "USBAUTO="true"?  If not, perhaps rather than comment out the line I should have used USBAUTO="false"?  I would very much appreciated some input on whether I need to make further corrections to this configuration to insure that gpsd runs correctly.

Many thanks for DRAWS.  What a fantastic product!

julie mcgrew

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