https://devzone.nordicsemi.com/f/nordic-q-a/49221/dfu-bootloaderHi, I am using nRF52832. I want to update my boot loader using DFU, I am unable to find correct command to get .zip file. I am using below command: nrfutil.exe pkg generate bootloader.zip --bootloader secure_bootloader_ble_s132_pca10040.hex --applicationen-USTelligent Community 13Wed, 03 Jul 2019 08:06:26 GMThttps://devzone.nordicsemi.com/thread/196162?ContentTypeID=1Wed, 03 Jul 2019 08:06:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ed1aea6c-7ed1-48ab-9c4c-534fa247ea32Hung Bui<p>It&#39;s up to you. If you want your image to be signed you would need to provide the private key.&nbsp;</p> <p>If you use the secure bootloader, it wouldn&#39;t accept an image without signature.&nbsp;</p> <p>Please have a look at my guide <a href="https://devzone.nordicsemi.com/nordic/b/blog/posts/getting-started-with-nordics-secure-dfu-bootloader">here</a>.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/196122?ContentTypeID=1Wed, 03 Jul 2019 06:04:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4341909f-7fa0-499a-8c3e-e6dc68375559chandan<p>I am using below commands and getting Waring :</p> <p>nrfutil.exe pkg generate bootloader.zip --bootloader secure_bootloader_ble_s132_pca10040.hex --bootloader-version 02 --hw-version 52 --sd-req 0xB7</p> <p><img height="111" src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1562133853439v1.png" width="423" alt=" " /></p> <p></p> <p>Should i also add key&nbsp;--key-file ? if yes which one pubic or private?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/196013?ContentTypeID=1Tue, 02 Jul 2019 13:14:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:73451301-6e32-4d83-9cb9-3c60c799fa06Hung Bui<p>Hi Chandan,&nbsp;</p> <p>Which issue you have ? I think you need <em>--bootloader-version</em>&nbsp;in addition&nbsp; .</p><div style="clear:both;"></div>