https://devzone.nordicsemi.com/f/nordic-q-a/83961/application-not-run-after-ble-dfu-on-nrf52840I use a example application from SDK_DIR\examples\ble_peripheral\ble_app_template\pca10056 base on nRF5 SDK v17.1.0,then use SDK_DIR\examples\dfu\secure_bootloader\pca10056_s140_ble_debug to write the application.The image i built follow https://infocenteren-USTelligent Community 13Mon, 24 Jan 2022 12:42:04 GMThttps://devzone.nordicsemi.com/thread/349249?ContentTypeID=1Mon, 24 Jan 2022 12:42:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:348049dd-28d6-4fe0-90c1-61a22f9b8ce9Vidar Berg<p>Hello,</p> <p>This is a known limitation when using RTT across bootloader and app, please see this thread for more details: <a href="https://devzone.nordicsemi.com/f/nordic-q-a/30310/easy-way-to-merge-bootloader-and-application-rtt-output">https://devzone.nordicsemi.com/f/nordic-q-a/30310/easy-way-to-merge-bootloader-and-application-rtt-output</a>. The simplest solution to this is to use UART logging in the app, is that an option?</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>