https://devzone.nordicsemi.com/f/nordic-q-a/67227/not-output-with-printfHello, I have the following application code (based on the template project from the SDK): The receive callback is working and I get all the characters from my terminal, but I don´t get any output with printf. How can I fix this?en-USTelligent Community 13Thu, 15 Oct 2020 12:36:27 GMThttps://devzone.nordicsemi.com/thread/275084?ContentTypeID=1Thu, 15 Oct 2020 12:36:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8d40f67e-a8d0-4ccf-94fd-ae7bc7f4e12cKarl Ylvisaker<p>Hello,</p> [quote user="Kampino"]the macro was missing and I add it. But the problem still exists.[/quote] <p>Could you also confirm for me that you have added the retarget source file&nbsp;<span>components\libraries\uart\retarget.c to your project?<br /><br />Best regards,<br />Karl</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/275017?ContentTypeID=1Thu, 15 Oct 2020 09:25:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:890e904d-1c39-49ac-b889-b88e9e99f87aKampino<p>Hello,</p> <p>the macro was missing and I add it. But the problem still exists.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/275015?ContentTypeID=1Thu, 15 Oct 2020 09:15:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6b4ca054-a7b4-450d-b021-242a8d034b72Karl Ylvisaker<p>Hello,</p> [quote user=""]<p>The receive callback is working and I get all the characters from my terminal, but I don´t get any output with printf.</p> <p>How can I fix this?</p>[/quote] <p>Could you check whether or not RETARGET_ENABLED is defined to 1 in your sdk_config?<br /><br />Best regards,<br />Karl&nbsp;</p><div style="clear:both;"></div>