<div dir="ltr"><div>After sleeping on it, I'm almost certain that we made some mistaken assumptions. I think the micro-USB "data" port on the DFT-70 is really an OTG port, not an embedded pl2303 chip. This explains why your Linux box calls it /dev/ttyACM0 and instead of /dev/ttyUSB0. If this is the case, the pl2303 module is not needed at all, and it had probably been loaded when you had some other cable plugged in. To support USB OTG, your Linux box loads one of several modules whose name starts with g_ (g_serial, g_cdc, g_multi). I think the choice depends on the capabilities that the OTG device advertizes, or possibly one or more modules whose names start with cdc_ (cdc_ether, cdc_subset, cdc_eem).</div><div><br></div><div>you can test this theory by first removing the pl2303 module:</div><div> sudo modprobe -r pl2303</div><div>and then plugging your FT-70 back in. If my theory is correct, /dev/ttyACM0 will come back into existence, but pl2303 will not reload. <br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 3, 2019 at 11:06 PM Dennis Carr <<a href="mailto:dennisthetiger@chez-vrolet.net">dennisthetiger@chez-vrolet.net</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">On Wed, 3 Apr 2019 22:36:26 -0700<br>
Dan Clemmensen <<a href="mailto:danclemmensen@gmail.com" target="_blank">danclemmensen@gmail.com</a>> wrote:<br>
<br>
> Sorry, I made a few mistakes, apparently. You will need to get an<br>
> answer from someone who has an FT-70.<br>
<br>
No, you're fine, you're on the right track - but you're probably not<br>
wrong about anyone else who's had the experience. <br>
<br>
Of note, having issues with virtualbox seeing my USB devices. I'm just<br>
gonna have to do this on my Windows box at work, methinks. <br>
<br>
-Dennis<br>
<br>
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