https://devzone.nordicsemi.com/f/nordic-q-a/24451/sdk-14-issue-with-secure-buttonless-dfuI was trying to verify the DFU functionality on SDK 14 on nRF52832. Here is what I did. 1. Using nRFgo to erase all 2. Program bootloader/soft device with C:\svn\nordic\nRF5_SDK_14.0.0_3bcc1f7\trunk\examples\dfu\secure_dfu_test_images\ble\nrf52832en-USTelligent Community 13Tue, 22 Aug 2017 19:29:28 GMThttps://devzone.nordicsemi.com/thread/96271?ContentTypeID=1Tue, 22 Aug 2017 19:29:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0b794e9c-315e-4366-8bb3-550768d9d993Rbai<p>4.9.3 compiler works fine.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/96270?ContentTypeID=1Tue, 22 Aug 2017 08:17:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:49e1b9b1-95cb-46a0-9e2c-ff709ca9c71fHung Bui<p>Good to know Rbai. Yes I think you should try with 4.9.x</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/96269?ContentTypeID=1Mon, 21 Aug 2017 19:07:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3ac93365-88f6-480e-bf93-3ffae3120b45Rbai<p>It is working by following your guide. It is still worth looking at the issue of the armgcc. Maybe I need to downgrade gnu version to 4.9.x?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/96268?ContentTypeID=1Mon, 21 Aug 2017 08:39:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3b850b51-bc7c-46c1-bfb0-d7c05494861bHung Bui<p>Hi,</p> <p>Could you try to follow my guide <a href="https://devzone.nordicsemi.com/blogs/1085/getting-started-with-nordics-secure-dfu-bootloader/">here</a> ?</p> <p>The main (and only) difference between the debug and the release version of the bootloader is the version checking. I explained that in the blog.</p> <p>Beside, if you want to get rid of the warning , just adjust the RAM start setting to what showed in the warning.</p><div style="clear:both;"></div>