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Windows will do this sometimes. You have to force the second com port to another port. In device manager right click on the port you want to change. Select "properties", then "port settings", and then the "advanced" button. Here you will find a drop down to
change the com port. You may see some ports that show as "in use" but you know that you are not using them. In that case it is OK to choose them anyway. Whenever windows sees a new com port it reserves the port for all future time as "in use" so that, if you
ever install that hardware again, it can get the same port. If you are not sure then choose a port that is not marked "in use". Finally, click OK.?
Tony
AD0VC
From:[email protected] <[email protected]> on behalf of Erik Larson via groups.io <kd7ykq@...>
Sent:?Friday, April 25, 2025 4:45 PM To:[email protected] <[email protected]> Subject:?Re: [QRPLabs] #qmx SSB Firmware beta 1_01_006 release ?
Windows:
Edition ? ?Windows 11 Pro
Version ? ?24H2 Installed on ? ??11/?18/?2024 OS build ? ?26100.3775 Experience ? ?Windows Feature Experience Pack 1000.26100.66.0 ?
Installed QMX firmware 1_01_006.
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Set serial ports = 1:
One serial port show up in Device manager, and it works. Audio device works, WST-X is able to TX and RX normally. ?
Set serial ports = 2:
Two serial ports show up in Device Manager, but they BOTH are assigned to the SAME COM port (COM5) - See Picture.
PUTTY or WSJT-X can connect to the QMX+, but they cannot both connect.
Looking at the USB device Details:
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There are a lot more, but mostly GUIDs and system stuff that are the same between both ports. Let me know if you need any others, this seems to be the pertinent ones.
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Tried changing one of the instances to COM6 and then opening them. the one on COM5 still opened properly, the one on COM6 gave this error:
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Set serial ports = 3:
No USB devices show up. Not serial ports nor audio device.
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I am willing to do whatever testing might help you Hans - even let you remote onto this computer if you think that will help.
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Erik - AD7OV
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