/guides/nrf-connect-sdk-guides/b/getting-started/posts/nrf-connect-sdk-tutorial---part-1-ncs-v1-4-0&rarr; Check out the preceding part of this tutorial series before starting on this: nRF Connect SDK Tutorial series - Part 0 This part of the nRF Connect SDK Tutorial series will be short and concise and will get you up and running w...en-USTelligent Community 13 Non-Productionhttps://test-devzone.nordicsemi.com/guides/nrf-connect-sdk-guides/b/getting-started/posts/nrf-connect-sdk-tutorial---part-1-ncs-v1-4-0Mon, 05 Apr 2021 11:05:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e8cf8d17-e580-4fe9-aa78-2081c4e10ca5user1031270<p><img src="/resized-image/__size/320x240/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-e8cf8d17-e580-4fe9-aa78-2081c4e10ca5/pastedimage1617620744719v1.png" alt=" " /></p><img src="https://test-devzone.nordicsemi.com/aggbug?PostID=1341&AppID=25&AppType=Weblog&ContentType=0" width="1" height="1">https://test-devzone.nordicsemi.com/guides/nrf-connect-sdk-guides/b/getting-started/posts/nrf-connect-sdk-tutorial---part-1-ncs-v1-4-0Mon, 05 Apr 2021 11:04:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e8cf8d17-e580-4fe9-aa78-2081c4e10ca5user1031270<p>this project ,i right click &quot;Solution &#39;hello_world&quot; want to include header file in project, but had not the item&quot;Proprecessor&quot;,I want to use SEGGER_RTT_printf,this fuction declaration in the SEGGER_RTT.h,NO matter how can i&nbsp;add header file ,build result always said &quot;undefined&nbsp;<span>SEGGER_RTT_printf&quot;</span></p><img src="https://test-devzone.nordicsemi.com/aggbug?PostID=1341&AppID=25&AppType=Weblog&ContentType=0" width="1" height="1">