https://devzone.nordicsemi.com/f/nordic-q-a/70276/nrf52840-dongle-nrf-connect-programmer-error-reopen-device-failedAttempting to program an nRF52840 dongle with sniffer_nrf52840dongle_nrf52840_7cc811f.hex, using nRF Connect Programmer v1.4.8, on Windows 7 Upon clicking &quot;Write&quot;, the red LED blinks quicker briefly, then goes out, and the log ends with &quot;ERROR Reopenen-USTelligent Community 13Mon, 11 Jan 2021 09:54:48 GMThttps://devzone.nordicsemi.com/thread/288325?ContentTypeID=1Mon, 11 Jan 2021 09:54:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:28f25977-9945-4890-af83-dedd8c89862fAmanda Hsieh<p>Hi Craig,&nbsp;</p> <p>The log is as expected.&nbsp;<span>The device will reset when the upgrade completes and the dongle will no longer show up in nRF Connect because the application used DFU Trigger Library is used, as it is no longer in DFU mode. Then the dongle can start to sniff. If you&nbsp;<a title="Installing nRF Sniffer" href="https://infocenter.nordicsemi.com/topic/ug_sniffer_ble/UG/sniffer_ble/installing_sniffer.html?cp=9_4_1">Install nRF Sniffer</a>&nbsp;correctly, you will see the frame as Figure 2. in the&nbsp;<a title="Running nRF Sniffer" href="https://infocenter.nordicsemi.com/topic/ug_sniffer_ble/UG/sniffer_ble/running_sniffer.html?cp=9_4_2">Running nRF Sniffer</a>&nbsp;when you open the Wireshark.&nbsp;&nbsp;</span></p> [quote user=""]Can you confirm whether or not nRF Sniffer supports sniffing extended advertisements with the nRF52840?[/quote] <p><span>Extended advertising is not yet supported by the nRF Sniffer.&nbsp;You may be able to see the initial packet&nbsp;ADV_EXT_IND&nbsp;but not the actual data extended packets, but not the actually extended packets that follow.&nbsp;See the explanation in this <a href="https://devzone.nordicsemi.com/f/nordic-q-a/64823/nrf-sniffer-capability-for-recognizing-extended-advertising-pdus/264784#264784">post</a>.&nbsp;</span></p> <p><span>-Amanda H.</span></p><div style="clear:both;"></div>