https://devzone.nordicsemi.com/f/nordic-q-a/58779/debug-and-testing-bmd-350-that-has-nrf52832-using-keilI have the bmdware.uvprojx project opened in Keil uVision 5 and have the BMD 350 breakout board containing the nRF52832 chip connected to my PC via a J Link debugger (EDU mini). When I use the nRFConnect v3.3.0 application to Select the Device (J-Linken-USTelligent Community 13Fri, 06 Mar 2020 15:58:41 GMThttps://devzone.nordicsemi.com/thread/238585?ContentTypeID=1Fri, 06 Mar 2020 15:58:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9ce534a5-6f68-4549-9b07-a250811e9859J&#248;rgen Holmefjord<p>Hi,</p> <p>I&#39;m not familiar with that particular Keil project, so you may get better support on that by contacting U-blox support.</p> <p>The <a href="https://infocenter.nordicsemi.com/topic/ug_nrfconnect_ble/UG/nRF_Connect_BLE/nRF_Connect_intro.html">BLE app in nRF Connect for desktop</a> is used for communication with other BLE devices using a Nordic development kit or Dongle as the communication layer instead of the built-in Bluetooth of the computer. This is done by interacting with the softdevice running on the chip through our <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_serialization.html?cp=7_1_3_43">serialization solution</a>. This works over UART (through J-Link VCOM functionality on DKs) or USB (on Dongles and DKs with USB support). As far as I can see, the J-Link EDU mini does not have any VCOM functionality built-in.</p> <p>I would recommend that you test with a more recent version of the J-Link RTT Viewer. The old versions sometimes do not work that well. It is also up to the firmware if it uses RTT to print anything. If you are running a U-blox firmware, you should check with their support if this is the case in this application.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>