USER MANUAL – Z-PASS1/Z-PASS2
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Sometimes the COM can be marked as “in use”:
If you need to use this COM number, click on “Continue”, then go to the device manager.
We must uncheck the “in use” flag by uninstalling the port. Since the port is not connected, click on “Show
hidden peripherals”:
Now all the ports that are not in use are displayed in transparent (also our COM3):