nRF Connect not able to open COM

[Timur Beganovic]

nRF Connect suddenly can not find the COM port to my nRF Dongle. The same setup used to work fine untill today. I reinstalled the nRF Connect, JLink drivers but it is still the same. As you can see, the device is listed in the Device manager.  I searched about this problem but couldn't find any solution. Please help!

[Mttrinh]

Hi,

Seems weird, and you haven't changed anything since last time you tried?

Can you try upgrade the JLink firmware? Also try a different COM port.

 

[Timur Beganovic]

Hi,

thank you for the response.

I uninstalled and installed again nrf Command Line Tools as well as nRF Connect. It didn't help. I also tried different COM ports without success.

Which JLink firmware version do you recommend?

[Mttrinh]

Can you try with v6.22g?

[Timur Beganovic]

After I installed JLink 6.22g, I got the same log output in nRF Connect.

Then I uninstalled the other JLink version and left only v6.22g. The output in nRF Connect was:

Failed to open nrfjprog: Error occured when open device long term. Errorcode: CouldNotLoadDLL (0x3)

Finally I reinstalled nrf command line tools which installs the JLink v6.20 and have the same output as in the first message I posted.

[Timur Beganovic]

I went through the bundle.js and found out that the function "validatePort" returns undefined "adapterToUse".

const adapterToUse = getState().app.adapter.api.adapters.find(x => x.state.port === port.comName);

Do you know what might be the cause for this error?

[Timur Beganovic]

The error was eliminated after I updated Windows. Unfortunately, I can not tell what caused the error but it is obvious that it has nothing to do with nRF tools or JLink drivers.