https://devzone.nordicsemi.com/f/nordic-q-a/35712/upload-failed-when-performing-dfu-over-bleDeveloped with SDK 15.0.0. and s132_nrf52_6.0.0_softdevice After I generate the DFU package, and upload it with nRF Toolbox, it will returns &quot; Upload failed: REMOTE DFU INVALID CRC ERROR &quot;. The code for generating the package: nrfutil.exe pkg generateen-USTelligent Community 13Mon, 25 Jun 2018 15:40:37 GMThttps://devzone.nordicsemi.com/thread/137511?ContentTypeID=1Mon, 25 Jun 2018 15:40:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7b2de937-cd55-4ef3-a66c-6e333adecd70littlebei<p>Thanks a lot, It works well now.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/137496?ContentTypeID=1Mon, 25 Jun 2018 15:09:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ea97fe41-6534-404a-b324-5a505d1f54b9Hung Bui<p>Hei ,</p> <p>&nbsp;</p> <p>Could you try follow <a href="https://devzone.nordicsemi.com/b/blog/posts/getting-started-with-nordics-secure-dfu-bootloader">my guide here</a> and let me know if you have the same issue. Please try to update first with an example in the SDK, ble_app_hrs for example (not the precompiled hex, as it contains the softdevice).&nbsp;</p><div style="clear:both;"></div>