https://devzone.nordicsemi.com/f/nordic-q-a/28599/is-it-possible-to-use-serial-dfu-without-softdeviceI think the answer is mostly no. My application is similar to the Gazell sample projects, it does not use Softdevice. What are the steps to make my application to be compatible with the softdevice so that I can use the serial DFU. I have gone throughen-USTelligent Community 13Mon, 18 Dec 2017 17:00:52 GMThttps://devzone.nordicsemi.com/thread/113345?ContentTypeID=1Mon, 18 Dec 2017 17:00:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a6b470b6-60c4-4545-b252-988378ba1ca0Joe<p>Thanks a lot! I will study the note.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/113344?ContentTypeID=1Mon, 18 Dec 2017 11:56:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a58c6fa6-28b1-4d05-9e35-77c1c4508203run_ar<p>Actually, you do not need the Softdevice, only the MBR. You could take a look at the thread sdk to find a standalone MBR (same as is used with Softdevice). Description <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.threadsdk.v0.11.0/thread_example_dfu.html?cp=4_2_0_2_4_0#thread_example_dfu_mbr_setup">here</a>.</p><div style="clear:both;"></div>