"cannot connect J-Link via USB"

[Cindy]

Hi 

I'm really new to this, forgive me it's a stupid question. I'm using the nRF52 DK from Nordic. 

I started with the "Developing with SEGGER Embedded Studio", but when I tried to "connect to JLink" under "target" menu, it shows like that 

In Device Manager 

and here's the 

Any help would be appreciated. 

Thanks,

Cindy

[Martin Lesund]

Hi Cindy,

• Please make sure you have the latest nrfjprog.
• SES IDE version v4.12
• Newer Jlink version

[Cindy]

the latest version I download from https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Command-Line-Tools/Download#infotabs is 6.44

[Cindy]

oh but weirdly, it dose work after I reinstalled the same version... Thanks. 

[awneil]

Cindy said:

In Device Manager 

It's not the COM port that matters here - it's the J-Link driver:

Although it's odd that one should be present but not the other!

Cindy said:

weirdly, it dose work after I reinstalled the same version

You do seem to get an awful lot of pop-ups during the installation asking to install many different drivers - it can look like it's asking you the same thing over & over!

Maybe you accidentally clicked 'cancel' instead of 'ok' on one of them?

Or just missed one of them ... 

Anyhow - good that it's working now!

Please verify the answer: