https://devzone.nordicsemi.com/f/nordic-q-a/119781/issue-with-ble-fota-on-nrf5340-using-python-no-notifications-for-chunksHi Nordic Tech Team, I am implementing BLE-based FOTA for the application core on an nRF5340 using MCUboot . The update works successfully when using the nRF Connect mobile app , but when I attempt the update using my Python script with Bleak , theen-USTelligent Community 13Fri, 14 Mar 2025 15:03:35 GMThttps://devzone.nordicsemi.com/thread/527409?ContentTypeID=1Fri, 14 Mar 2025 15:03:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:615535ba-1176-4c80-aec5-5b5bd75ec616Vidar Berg<p>Hello,</p> <p><span style="font-family:inherit;">I think maybe the easiest way to&nbsp;troubleshoot this further&nbsp;would be to capture BLE sniffer traces of both the working and failing DFU sessions and compare the SMP requests to see if you can spot any differences.</span></p> <p><span style="font-family:inherit;">nRF Sniffer for Bluetooth LE :&nbsp;</span><a style="font-family:inherit;" href="https://www.nordicsemi.com/Products/Development-tools/nRF-Sniffer-for-Bluetooth-LE">https://www.nordicsemi.com/Products/Development-tools/nRF-Sniffer-for-Bluetooth-LE</a><span style="font-family:inherit;">&nbsp;</span></p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>