https://devzone.nordicsemi.com/f/nordic-q-a/45108/j-link-nrf-51822-not-connectingIn following the instructions of the nRF_Sniffer_User_Guide_v2.0.pdf, I&#39;m attempting to use Segger&#39;s J-Link software to configure my nRF-51822. The environment is a Mac OSX Mojave (10.14.3). J-Link reports it isn&#39;t able to connect via USB. Here&#39;s theen-USTelligent Community 13Wed, 20 Mar 2019 16:01:04 GMThttps://devzone.nordicsemi.com/thread/177427?ContentTypeID=1Wed, 20 Mar 2019 16:01:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b891ec99-e056-4bc2-af0b-6853cd81d8cfStian R&#248;ed Hafskjold<p>Ok, so this does not have an onboard JLink, according to this link: <a href="https://learn.adafruit.com/introducing-the-adafruit-bluefruit-le-sniffer/usb-driver-install">https://learn.adafruit.com/introducing-the-adafruit-bluefruit-le-sniffer/usb-driver-install</a></p> <p>You should probably install the drivers as described in the above link, and then just skip the &quot;install firmware with SEGGER J-Link&quot; section in the sniffer user guide. From the adafruit pages it seems to me that the dongle already has the sniffer firmware.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/177421?ContentTypeID=1Wed, 20 Mar 2019 15:46:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:33705a7d-1ec4-4955-b396-030dbe3f52ceadamb<p>This is the hardware:&nbsp;<a href="https://www.adafruit.com/product/2269">https://www.adafruit.com/product/2269</a><br /><br />I&#39;m sorry but I&#39;m not sure where to look for the chip revision.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/177416?ContentTypeID=1Wed, 20 Mar 2019 15:39:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2d4ea974-943f-406b-a04c-ef2cddd3f8eaStian R&#248;ed Hafskjold<p>What type of hardware is your nRF51822 soldered on? And which chip revision is this?</p><div style="clear:both;"></div>