[nRF5340] BLE DFU – Increase transfer rate kB/s

[nRF5340] BLE DFU – Increase transfer rate kB/shttps://devzone.nordicsemi.com/f/nordic-q-a/124480/nrf5340-ble-dfu-increase-transfer-rate-kb-sHi Nordic Support Team, I’m working on an application running on a custom nRF5340 board with nRF Connect SDK 3.0.2. My goal is to perform BLE DFU only on the Application Core, using an external flash memory. Is there a way to improve the BLE DFUen-USTelligent Community 13Fri, 19 Sep 2025 12:19:39 GMTRE: [nRF5340] BLE DFU – Increase transfer rate kB/shttps://devzone.nordicsemi.com/thread/549312?ContentTypeID=1Fri, 19 Sep 2025 12:19:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dc8a795a-84fd-446c-a6e0-35bc1c8054d0Einar Thorsrud<p>Hi,</p> <p>You can have a look at <a href="https://github.com/droidecahedron/nrf_ble_dfu_dle">this </a>unofficial sample, and you should ad <code>NCS_SAMPLE_MCUMGR_BT_OTA_DFU_SPEEDUP=y</code> (this will enable a set of other configs that affect DFU speed, such as BLE buffers). Also note that there may be other limiting factors, such as flash write speeds.</p><div style="clear:both;"></div>