Detect that bootloader ran at application startuphttps://devzone.nordicsemi.com/f/nordic-q-a/52874/detect-that-bootloader-ran-at-application-startupWe are using the secure BLE bootloader from the nrf52 SDK versio 15.2. We did put in our own key files, but other than that I think that I don&#39;t think we changed much in the bootloader. When the bootloader runs and starts the new application, is thereen-USTelligent Community 13Tue, 08 Oct 2019 12:11:25 GMTRE: Detect that bootloader ran at application startuphttps://devzone.nordicsemi.com/thread/213907?ContentTypeID=1Tue, 08 Oct 2019 12:11:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0de47b6a-e695-4142-a071-40a73acab5a7jrowe<p>Thanks! I think that is what we will do.</p><div style="clear:both;"></div>RE: Detect that bootloader ran at application startuphttps://devzone.nordicsemi.com/thread/213893?ContentTypeID=1Tue, 08 Oct 2019 11:35:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1d11f7bc-4c73-4e23-9799-bfe02303dc54Susheel Nuguru[quote user=""]When the bootloader runs and starts the new application, is there any way to tell from the application that the bootloader just ran?[/quote] <p>Unfortunately, bootloader does not set anything&nbsp;for the app to detect that it just ran, but you can ofcourse change it like you mentioned by setting the GPREGRET registers.</p><div style="clear:both;"></div>