https://devzone.nordicsemi.com/f/nordic-q-a/85143/dfu-3-nrf52840dk-over-ble-mesh-serial-connectionHi there, We would like process to process a Mesh DFU Mesh: I dont know if I can call that a mesh but it&#39;s basically 4 52840_DK connected in serial over BLE using nRF5_SDK_15.2.0 GateWay --&gt;Node1--&gt;Node2--&gt;Node3 periph ---&gt;central ---&gt;periph en-USTelligent Community 13Mon, 28 Feb 2022 08:47:09 GMThttps://devzone.nordicsemi.com/thread/355188?ContentTypeID=1Mon, 28 Feb 2022 08:47:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:acb090d9-0e0d-4f8c-a0d2-dc5745132940tesc<p>Hi,</p> <p>The Mesh DFU solution is specific to nRF5 SDK for Mesh, and uses a similar and parallel network to the Bluetooth mesh network for transferring the upgrade. It is only suited for use with a Bluetooth mesh network, not with other network types.</p> <p>What you describe is a topology of standard BLE devices connected to each other as peripherals and centrals.</p> <p>What you can do for your use case, is to use <a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.2.0%2Fble_sdk_app_dfu_bootloader.html">Secure DFU Bootloader</a> from nRF5 SDK.</p> <p>Regards,<br />Terje</p><div style="clear:both;"></div>