https://devzone.nordicsemi.com/f/nordic-q-a/64607/pca10040-doesn-t-workDear technical support team, I&#39;m using a PCA10040 board to sniff BLE packet. Following the document named &quot;nRF Sniffer for Bluetooth LE v3.0.0&quot;, I managed to see some packets on wireshark during several seconds (arround 30s). After that, the boarden-USTelligent Community 13Tue, 11 Aug 2020 12:11:41 GMThttps://devzone.nordicsemi.com/thread/264038?ContentTypeID=1Tue, 11 Aug 2020 12:11:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:faf7e676-5406-4972-994f-9d720262cf71tesc<p>Hi,</p> <p>If you press and hold the &quot;IF BOOT/RESET&quot; when powering the board, it will enter bootloader mode for the interface MCU (entering the bootloader for the Segger J-Link programmer on the board).</p> <p>Instead of starting the board that way, try powering it the normal way and try the following command from a command line such as cmd.exe:</p> <p>nrfjprog --recover</p> <p>You can also try to install the latest <a href="https://www.segger.com/downloads/jlink/#J-LinkSoftwareAndDocumentationPack">J-Link Software and Documentation Pack</a> from Segger, then use the program J-Link Configurator to upgrade the interface MCU firmware to the latest firmware version, to see if that improves the stability.</p> <p>Regards,<br />Terje</p><div style="clear:both;"></div>