https://devzone.nordicsemi.com/f/nordic-q-a/13608/rtt-viewer-adding-extra-terminalsI&#39;m new to using the RTT Viewer. It was working fine (all morning). I&#39;ve only been using the SEGGER_RTT_printf(0, &quot;string %d \n&quot;,x); call to dump text and data to the viewer. I only use terminal 0. RTT Viewer is now having problems. Terminal 0 outputen-USTelligent Community 13Tue, 03 May 2016 03:27:39 GMThttps://devzone.nordicsemi.com/thread/51933?ContentTypeID=1Tue, 03 May 2016 03:27:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ee7f4d2b-9b60-4d97-80da-e7cb1910b972Tien<p>Terminal data should always store in the buffer 0, and the terminal index is a special two bytes identifier (0xFF + ASCII 0-F). eg, if there is hex value 0xFFFF in terminal output stream, it will warn you &quot;Could not add output to terminal -1&quot;.</p> <p>And check your Keil Editor Settings : Encoding. UTF8 is prefered.</p><div style="clear:both;"></div>