https://devzone.nordicsemi.com/f/nordic-q-a/76507/dfu-to-update-third-party-ecuWe would like to try using the standard DFU process to update third party ECU connected to the nrf52 chip. Our idea is to modify the standard DFU zip package - to add a new parameter to the manifest.json, for example a motor controller: Then, whenen-USTelligent Community 13Mon, 21 Jun 2021 11:15:19 GMThttps://devzone.nordicsemi.com/thread/316239?ContentTypeID=1Mon, 21 Jun 2021 11:15:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a51247c0-5c6d-4427-853e-c1cca77c01a4Vidar Berg<p>Hello,</p> <p>If you use nRF5 SDK 15.3.0 or later and look at the source code, you should see that there is a FW update type called &quot;External application&quot;. It&#39;s still an experimental feature, and documentation is lacking, but should be a good starting point for what you are trying to do.</p> <p><strong>sdk_config.h setting from nRF5 SDK 17.0.2</strong></p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1624273776439v1.png" alt=" " /></p> <p>Do you expect Bank 1 on your device to be large enough to receive the full image before transferring it over SPI/i2c?</p> <p><strong>Bank 1 is the free area between main application and reserved application data/bootloader:</strong></p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1624274063164v2.png" alt=" " /></p><div style="clear:both;"></div>