https://devzone.nordicsemi.com/f/nordic-q-a/76256/porting-a-segger-ble-softdevice-project-from-nrf52840-dk-to-nrf52840-dongle-works-but-no-ledI have a working code using SoftDevice 140 7.2.0 and Segger ES on the nRF52840 DK. I made the single adjustment of the preprocessor variable BOARD_PCA10056 to BOARD_PCA10059 as indicated by the tutorial. I used the nRFConnectProgrammer to flash the dongleen-USTelligent Community 13Fri, 11 Jun 2021 13:41:38 GMThttps://devzone.nordicsemi.com/thread/314932?ContentTypeID=1Fri, 11 Jun 2021 13:41:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b704267a-1513-4400-bfa1-65cf6d5f8155brianreinhold<p>I figured that out. It just must of been the case the pc-ble-driver turned on the LED. I thought it was a power on LED.. What was confusing me were the error messages in the nRFConnect app and the fact it told me to press the reset button (which I did). If this is always the case, it would be very helpful to say in the log &#39;programming successful DFU now disabled&quot;. instead of all these error messages?&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/314920?ContentTypeID=1Fri, 11 Jun 2021 13:04:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:236bf705-aafb-4801-af1f-8bc810076009Simonr<p>Hi</p> <p>What kinds of error messages are you referring to? The nRFConnect programmer will give some errors when the DFU is disabled and the application is running, as it will no longer be able to communicate with the PC when the USB DFU firmware is no longer running, so that part is expected behavior.</p> <p>The green LED you&#39;re not seeing is likely because the application you&#39;re now running is not turning this LED on. This is not an indicator that an application is running, but will only be on if your application says so.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>