https://devzone.nordicsemi.com/f/nordic-q-a/12253/bootloader-only-supports-for-one-softdevice-in-image-signingIn the nordic documentation it mentioned that in the init packet we can write list of supported softdevices so that if one of that matches it will start the dfu. But in Signed image example the in source file dfu_init_template_signing.c while (i &lt;en-USTelligent Community 13Wed, 02 Mar 2016 10:50:53 GMThttps://devzone.nordicsemi.com/thread/46350?ContentTypeID=1Wed, 02 Mar 2016 10:50:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9dd29522-eb21-4abf-b73a-cc6acf4cf58eVidar Berg<p>This appears to be a mistake as the while loop has no effect, but you can try to replace this loop with the one from dfu_init_template.c.</p><div style="clear:both;"></div>