https://devzone.nordicsemi.com/f/nordic-q-a/62246/ozone-connection-failedHi Devzone: I am not sure if I should ask segger or here, basically I am trying to use Ozone for performance analysis. I always get this message when starting: Device &quot;NRF52840_XXAA&quot; selected. InitTarget() start InitTarget() end TotalIRLenen-USTelligent Community 13Mon, 08 Jun 2020 15:32:28 GMThttps://devzone.nordicsemi.com/thread/253864?ContentTypeID=1Mon, 08 Jun 2020 15:32:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:98326c84-8c63-4cfb-a192-c6d81ec00e7fcpeng<p>Thanks! it worked.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/253748?ContentTypeID=1Mon, 08 Jun 2020 10:40:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0fc482e5-b896-4afd-a678-d67ad6f13e31H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>nRF devices does not have JTAG. When setting up your project in ozone, please make sure that you select SWD, and not JTAG.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>