I’m using the RAK5010 for a project and there are some issues with connectivity over time. I just received my J-Link and thought I saw that there is debug output from the core RUI code. Is that not the case? I’m not getting any data in RTT Viewer.
Is there a document on how to setup RTT Viewer to show output from the RAK5010?
Answering my own question…
I updated the J-Link software and some setting were not preserved. After reselecting the correct Nordic Semi nRF52840 device, running J-Flash to verify that I have the correct device, RTT Viewer worked as I expected.
It is great that you have found the solution 
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