<div dir="ltr"><div>Stephen - <br></div><div>Thank you for that detailed reply. Before I gave up last night, I was wondering if Kenwood was using a "rebranded" driver. You saved me a lot of time trying to track that info down. Regrettably, I'm still getting the "
Device Cannot Start (Code 10)" error message, even with the Silicon Labs drivers. It wouldn't surprise me if recent Win 10 updates are the culprit. Back to the drawing board on my end.</div><div><br></div><div>Matt</div><div>N8SHA<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jul 11, 2021 at 8:10 AM Stephen H Smith <<a href="mailto:WA8LMF2@aol.com">WA8LMF2@aol.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div>On 7/10/2021 11:30 PM, Matthew Adair
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hi folks,</div>
<div>I know the last time I tried connecting my TH-D74 to my PC
as KISS TNC, it worked fine. However, my PC no longer
recognizes when I attach my radio to it. I've removed and
re-installed the Kenwood Virtual ComPort drivers, but no luck.
The Kenwood programmer doesn't recognize it either. Nothing
shows up in the Com ports under the device manager. I've also
tried multiple USB cables.<br>
</div>
<div><br>
</div>
<div>I also tried adding it manually through the device manager.
When I do that, it reports that the "Device Cannot Start (Code
10)" Most of the resources I see say to update the drivers.
I've made sure I have the latest from the Kenwood website, but
those are still dated 2016.</div>
<div><br>
</div>
<div>Hoping somebody out there might have some solutions -
Thanks!<br>
</div>
<div><br>
</div>
<div>Matt Adair</div>
<div>N8SHA<br>
</div>
</div>
</blockquote>
<p><font face="Arial"> </font></p>
<p><font face="Arial">The "driver" in question is nothing
Kenwood-specific. it is the software for the Sllicon Labs
a.k.a. "Silabs" </font>CP210x USB-to-Serial bridge chip.
This is one of the common chips widely used in
USB<-->serial cable "dongles", along with the Prolific 2302
and the FTDI chip. The only difference is that the
USB<-->serial conversion is inside the device, instead of in
an external cable assembly. The "Silabs" chip is particularly
popular with the Japanese radio manufacturers and is used in a
wide variety of Kenwood and Yaesu products. <br>
</p>
<p>A characteristic pattern is that mfrs adopt a particular
USB<-->serial chip in their product designs, put the
then-current version of the chip's driver on their web site as
through it was something proprietary, and then forget about
it. Unfortunately, like most software, these device drivers are
forever being updated to play catch-up with newer versions of
operating systems. Especially the incessant every-6-months FORCED
updates of Windows 10. The problem is even worse for products
that have been discontinued -- most mfrs just don't bother to
check for software changes in 3rd party components used in their
products. <br>
</p>
<p>For radio programming interfaces, GPS devices, soundcard
interfaces, etc that use one of the known USB<-->serial
interfaces, NEVER use the driver provided on a CD-ROM or linked on
the manufacturer's website. It is virtually guaranteed to be
several versions out of date. Go to the chip vendor's website
instead. For the Silabs chip, the latest version was released
in
January of this year: <br>
</p>
<p>
<a href="https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers" target="_blank"><https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers></a></p>
<p>The best way to do the update is to first completely remove all
signs of the previous driver. When you remove the device in the
Windows Device Manager, be sure to check the box for "Delete the
driver software for this device" in the Uninstall dialog. Then
run the setup for the newly-downloaded version. <br>
</p>
<p><br>
</p>
<p>These are the direct links for the updates for the other popular
USB<-->serial chips:</p>
<p>- FTDI chips:
<a href="https://ftdichip.com/drivers/vcp-drivers/" target="_blank"><https://ftdichip.com/drivers/vcp-drivers/></a></p>
<p>- Prolific PL-2302
<a href="http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41" target="_blank"><http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41></a></p>
<p>- Mysterious Chinese "CN340" chip used in many generic
programming cables on eBay:<br>
<a href="http://www.wch.cn/download/CH341SER_ZIP.html" target="_blank"><http://www.wch.cn/download/CH341SER_ZIP.html></a> Page
is all in Chinese and will look like a mess if you don't have a
Unicode font installed,, but the link works anyway.</p>
<p>___________________________________________________________<br>
</p>
<p>NOTE: I always have the latest versions of all these drivers in
my "Ham Software DVD MegaPack" collection which is updated
monthly, and is downloadable for free from my website here:</p>
<p> <a href="http://WA8LMF.net/HamDisks" target="_blank"><http://WA8LMF.net/HamDisks></a></p>
<p>I sell DVDs and flash drives of this collection at hamfests and
radio club meetings, but the ISO image of the DVD is downloadable
for free from the web site.</p>
<hr width="100%" size="2">Stephen H. Smith wa8lmf (at) <a href="http://aol.com" target="_blank">aol.com</a> <br>
Skype: WA8LMF<br>
EchoLink: Node # 14400 [Think bottom of the 2-meter
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<p><br>
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<p><br>
</p>
</div>
</blockquote></div>