https://devzone.nordicsemi.com/f/nordic-q-a/97496/programmatically-update-firmwareHi I&#39;m using an nRF52840 with Zephyr and nRF Connect SDK v2.1.0. In our device, we use USB (CDC ACM) as an interface that accepts JSON formatted commands. At the same time, we require a means for DFU via USB. I checked out the SMP server sample .en-USTelligent Community 13Thu, 09 Mar 2023 15:11:13 GMThttps://devzone.nordicsemi.com/thread/414431?ContentTypeID=1Thu, 09 Mar 2023 15:11:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8f060a6e-4533-4b78-96b7-5b87be8f67a8Amanda Hsieh<p>Hi,&nbsp;</p> <p><span>The management subsystem is based on the Simple Management Protocol (SMP) provided by&nbsp;</span><a href="https://github.com/apache/mynewt-mcumgr"><span>MCUmgr</span></a>. You can contact their&nbsp;Slack channel:<span>&nbsp;</span><a href="https://mynewt.slack.com/messages/C7Y3K0C2J" rel="nofollow">https://mynewt.slack.com/messages/C7Y3K0C2J</a>&nbsp;for your requirement.&nbsp;</p> <p>Regards,<br />Amanda H.</p><div style="clear:both;"></div>