[Elecraft] K3S USB port

[Jim Sheldon]

Hi Fred,
Not the K3 utility, but I did have the P3 utility running simultaneously 
for a time and it seemed to work just fine.  It connected and pulled in 
the FW versions I was looking for.

I did find what was giving the P3 it's information and the reason it had 
a slight update delay.  Turns out that FLDIGI on the Raspberry Pi 2 was 
echoing the serial information via /devttyUSB0 from the Pi and that was 
getting sent back to the P3 over the K3S's RS-232 on the RJ-45 
connection.  After I shut down FLDIGI on the Pi, the updates stopped and 
the P3 no longer changed the displayed frequency as the K3S was tuned.  
As soon as I restarted FLDIGI on the Pi 2, it went back to updating as 
the K3S changed frequency (with a slight delay) and almost instantly if 
the point and click controls in FLDIGI were used to change frequency.

I understand what's happening now and it seems to be only with the Pi 2 
and FLDIGI that it works this way.  Could prove to be useful, but I 
don't plan to rely on it - LOL.

Jim

------ Original Message ------
From: "Cady, Fred" <fcady at montana.edu>
To: "Elecraft Mailing List" <elecraft at mailman.qth.net>; "Jim Sheldon" 
<w0eb at cox.net>
Sent: 3/3/2016 1:56:03 PM
Subject: Re: [Elecraft] K3S USB port

>Hi Jim,
>It's my understanding that the RS232 port is live for serial data out 
>from the K3 (RXD) but not for serial data in (TXD).
>Have you tried to use the K3 Utility with your set up? That would 
>require bidirectional serial data and in theory shouldn't work.
>Cheers,
>Fred KE7X
>
>
>________________________________________
>From: Elecraft <elecraft-bounces at mailman.qth.net> on behalf of Jim 
>Sheldon <w0eb at cox.net>
>Sent: Thursday, March 3, 2016 10:48 AM
>To: Elecraft Mailing List
>Subject: [Elecraft] K3S USB port
>
>First off, this is NOT a complaint, merely an observation. and in my
>opinion, worthy of note for the programmers to check out.  I didn't
>think this was supposed to work but it seems to work quite well, at
>least in my case.
>
>I am using serial RS-232 with the following cabling - Desktop COM-1 to
>P3, P3 to K3S using the DE-9 to RJ-45 adapter (not the two headed cable
>between the P3 and K3S) from my desktop computer.  I am also running 
>the
>USB port cable to a Raspberry Pi model 2, single board Linux computer
>with the K3S configured as the USB Audio Codecs AND serial comms using
>/devttyUSB0 for rig control with VOX for PTT, in FLDIGI on the 
>Raspberry
>Pi.  All serial speeds are set to 38.4K baud.
>
>The P3 still indicates the K3S frequency as I tune (slight delay),
>FLDIGI on the Pi 2 indicates the K3S frequency as I tune.  TX/RX audio
>from and to FLDIGI on the Pi 2 work properly, and I am able to make
>contacts with no problem as well.  I can also tune the K3S using
>FLDIGI's frequency control.  I am using N3FJP's AC Log program on the
>big desktop computer for logging and it also displays the proper
>band/mode from the K3S.  It also follows frequency changes made by the
>FLDIGI program on the Pi 2.  I did not attempt to configure DTR or RTS
>for push to talk as VOX works so well.
>
>It was my original understanding that you couldn't do this (RS-232 
>using
>the RJ-45 jack AND the USB port simultaneously).  I DO have the K3S
>RS-232 configured to USB in the menu.  The difference may be due to the
>fact that I'm using two separate computers here with both
>talking/listening to the K3S.
>
>I'm running FW version UC 5.46, DSP 1 and 2  version 2.86, FL version
>1.25 on the K3S and MCU 1.57, SVGA 1.31 and the FPGA's 1.04 in the P3.
>
>DISCLAIMER: If anyone else tries this, make sure to SAVE YOUR
>CONFIGURATION prior to making any changes so you won't forget what they
>were before and if something messes up you can re-load the previous
>version.
>
>
>Jim Sheldon, W0EB
>
>
>
>
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