I’m a relative newbie that recently purchased a Proxmark3 Easy and have been attempting to get it set up on Windows 11. When did the initial flash yesterday I was able to run pm3 just fine, but today with no changes it is giving me the attached error. I was able to re-flash the bootrom and the image using the button trick but it still won’t recognize that it is attached to a serial port despite being visible as COM8 in the Device manager. I’m honestly not sure what to try next.
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Are you sure it’s COM8?
Check Device Manager in Windows (win + x), and see under COM ports.
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I am indeed sure it is COM8 - it is what appears and disappears in the Device Manager when I plug in and unplug it. If I run the ./pm3 --list command it appears in the output as well.
Tried a good old reboot? just in case something else is hogging the com-port…and I guess you are using the end-port, not the side-port?
Yes I have tried rebooting it, yes it is plugged into the end port.
I’m presuming here, but the legacy client script or driver may be struggling with a port higher than COM4.
Have you tried lowering the port number?
In device manager, right-click the Proxmark3 (COM8), select Properties>Port Settings>Advanced and change the COM Port Number to COM3 or COM4.
It also looks like you have a lot of com ports and windows is notorious for basically putting two devices on the same com port registration.
I would unplug the proxmark, reboot, open device manager and check the ports, then plug the proxmark in and make sure a new port appears for the proxmark.
Also have you installed any drivers for the proxmark? Sometimes people do that and it’s only meant to be used with very old proxmark firmware, so if you have installed a special proxmark driver then uninstall it.
Finally, there are many branches of proxmark firmware. What exactly have you compiled on your machine and flashed to your proxmark?