https://devzone.nordicsemi.com/f/nordic-q-a/17190/please-help-me-with-generating-init-packet-for-dfuHi, I need help for generating the init packet. I&#39;m using SDK 11.0.0 , s130 on nrf51822. To build bootloader, I&#39;ve used the sample bootloader with some include path changes for linking. I have my application code ready. Both my bootloader and applicationen-USTelligent Community 13Thu, 20 Oct 2016 11:54:48 GMThttps://devzone.nordicsemi.com/thread/66027?ContentTypeID=1Thu, 20 Oct 2016 11:54:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:63523ce6-9f96-4254-8c6d-f65c77fe2346bjorn-spockeli<p>Happy to help. :) I would appreciate if you could mark the answer as correct ( click the checkmark in the circle to the left of the answer).</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/66026?ContentTypeID=1Thu, 20 Oct 2016 11:48:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2324541e-0682-4bab-a43b-93c988da0a57Raghu GS<p>Thank you, after changing --sd-req 0xfeff to --sd-req 0xfffe its working fine. I hope this will be useful for someone else too..</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/66025?ContentTypeID=1Thu, 20 Oct 2016 11:00:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:48e6056e-8387-42fd-811b-3353690b7d5fbjorn-spockeli<p>I think the softdevice requirement option is incorrect, i.e.</p> <p><code>--sd-req 0xfeff</code> should be <code>--sd-req 0xfffe</code>.</p><div style="clear:both;"></div>