https://devzone.nordicsemi.com/f/nordic-q-a/72738/cli-lock-upGood afternoon, I&#39;m working on troubleshooting an issue we&#39;re having in the field. We are using the CLI libraries to provide an nRF52840-based board with an interface to the host PC over USB CDC ACM using the associated CLI transport. What we&#39;re seeingen-USTelligent Community 13Mon, 15 Mar 2021 13:48:20 GMThttps://devzone.nordicsemi.com/thread/299815?ContentTypeID=1Mon, 15 Mar 2021 13:48:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:75d0f84a-e031-4565-a1a4-fffd1e54f702Kenneth<p>Hello,</p> <p>You are using a relative old nRF5 SDK, I suggest to repeat tests with the latest 17.0.2:<br /><a href="https://www.nordicsemi.com/Software-and-tools/Software/nRF5-SDK/Download#infotabs">https://www.nordicsemi.com/Software-and-tools/Software/nRF5-SDK/Download#infotabs</a></p> <p>I know there have been fixes in general to the USB driver and USB examples that may affect the issue you see, though I am not aware of anything in specific. Maybe the release notes for the latest nRF5 SDK can show something.</p> <p>Kenneth</p><div style="clear:both;"></div>