https://devzone.nordicsemi.com/f/nordic-q-a/45666/how-to-test-mesh-dfu-example-v3-1-01. I read the Configuring DFU over Mesh &amp; nrfutil User Guide , but still do not know how to test this example. 2.is we must need 2 devices, A connenct to PC for nrfutil , B is the target to upgrade , but which firmware should burning to A &amp; B. 3.Ien-USTelligent Community 13Wed, 03 Apr 2019 11:53:43 GMThttps://devzone.nordicsemi.com/thread/179979?ContentTypeID=1Wed, 03 Apr 2019 11:53:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ecfce645-a27f-4973-85a6-ebb58833b370Joakim Jakobsen<p>Hi.&nbsp;</p> <p>You already have a related ticket for this:&nbsp;</p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/45595/how-to-use-the-dfu-example">https://devzone.nordicsemi.com/f/nordic-q-a/45595/how-to-use-the-dfu-example</a>&nbsp;</p> <p>You haven&#39;t responded to the feedback from my colleague.&nbsp;<br />Please try to keep the discussion in one ticket, instead of just creating new ones.&nbsp;</p> <p></p> <p>Best regards.</p><div style="clear:both;"></div>