https://devzone.nordicsemi.com/f/nordic-q-a/69691/impossible-to-use-ble-dfuHi, I&#39;m trying to set up BLE DFU for bith the app and net cores of the nrf5340. We are currentrly using NCS 1.4.99, commit 3366927a54 (need latest master for lorawan usage) I&#39;ve enabled all the configurations described in the doc: The coresen-USTelligent Community 13Mon, 21 Dec 2020 09:13:29 GMThttps://devzone.nordicsemi.com/thread/285989?ContentTypeID=1Mon, 21 Dec 2020 09:13:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a281cb19-ce17-4121-8547-89c8af51d493GiulianoFranchetto<p>Hi,</p> <p></p> <p>I&#39;ll try your suggestions today.</p> <p></p> <p>Rearding the revision we are using the latest one. Nordic sent us a few samples of the &quot;corrected&quot; silicon: nrf5340-QKAACA</p> <p></p> <p>Regards</p> <p>Giuliano</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/285976?ContentTypeID=1Mon, 21 Dec 2020 08:42:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:34470623-6578-4bb7-a0a6-86a073ef66faEinar Thorsrud<p>Hi&nbsp;Giuliano,</p> <p>I do not immediately see any problems. Do you see the same problem if using NCS v1.4.99-dev1 for testing this? What if you do DUF without encryption, by setting&nbsp;<code><span>CONFIG_MCUMGR_SMP_BT_AUTHEN</span></code><span><code>=n</code>?&nbsp;</span>Also, which nRF5340 revision do you use?</p> <p>Einar</p><div style="clear:both;"></div>