Com port works for the first time and then could not be opened in Windows 11. Unplug and plug again to make it work again for one more time only.

[Danial Saleemi]

I'm using USB to serial adapter to connect an arm7-based evaluation board. This serial port helps me to program the said microcontroller using a utility called "ARMWSD". I was able to successfully do the said operation on Windows 10 without any problem, but in Windows 11, the same setup works for one time only. That is; I can open the com port, download my code into the microcontroller using ARMWSD., and immediately receive the pop-up: "COM Port cannot be opened". As a way around, if I unplug the USB (adapter) from the laptop, and plug it back again, then I am able to use the com port again fo

Continue reading...