Gracefully shutting down modem doing BLE DFUhttps://devzone.nordicsemi.com/f/nordic-q-a/110756/gracefully-shutting-down-modem-doing-ble-dfuWe are using NRF52840 and modem HL78XX, zephyr NCS 2.4.1. BLE DFU could be started at any time and modem could be active during all DFU process and during reset by FOTA. What is the best way to gracefully shutdown modem during BLE DFU before reseten-USTelligent Community 13Fri, 03 May 2024 02:18:10 GMTRE: Gracefully shutting down modem doing BLE DFUhttps://devzone.nordicsemi.com/thread/481655?ContentTypeID=1Fri, 03 May 2024 02:18:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1f85fd81-9245-471d-a417-a5e318ed79bdiivanov<p>Hello,</p> <p>Thanks for advice.</p> <p>Yes, we found that it is possible to use MCUmgr Callbacks with mcumgr events subscribed.</p> <p>Works fine.</p> <p>Kind regards</p><div style="clear:both;"></div>RE: Gracefully shutting down modem doing BLE DFUhttps://devzone.nordicsemi.com/thread/481508?ContentTypeID=1Thu, 02 May 2024 11:19:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cee5ecd9-2707-438c-8bef-1f678da87b58Vidar Berg<p>Hello,</p> <p>Yes, it is possible to subscribe to mcumgr events to know when DFU has started, please see <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.6.1/zephyr/services/device_mgmt/mcumgr_callbacks.html">MCUmgr Callbacks</a>. I&#39;m not familiar with the modem your using, but I assume you may want to terminate any existing connections when receiving the DFU started event.</p> <p>Kind regards,</p> <p>Vidar</p><div style="clear:both;"></div>