https://devzone.nordicsemi.com/f/nordic-q-a/26289/problems-with-nrf_log-or-not-full-output-in-rtt-viewerHi to everyone! I have a problem with the NRF_LOG or with RTT Viewer. I wrote this simple code, just to test an output console. int i = 0; while (i&lt; 100) { NRF_LOG_INFO(&quot;%i&quot;, i); NRF_LOG_FLUSH(); i++; } But, when I execute it,en-USTelligent Community 13Thu, 09 Nov 2017 19:41:49 GMThttps://devzone.nordicsemi.com/thread/103480?ContentTypeID=1Thu, 09 Nov 2017 19:41:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2cedf930-795c-421d-9c44-7e88fca22726nemunoz<p>Yeah! It works!</p> <p>I just added nrf_delay_ms(100); before i++; (as you said) and now everything is showing up.</p> <p>Thank you so much!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/103477?ContentTypeID=1Thu, 09 Nov 2017 19:38:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:32d29f41-7250-4c8f-aa7d-adac7f44640cnemunoz<p>I changed the SEGGER_RTT_CONFIG_BUFFER_SIZE_DOWN from 16 to 64 (and 256 at the end).</p> <p>Nothing changes. It still hangs on 20.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/103478?ContentTypeID=1Mon, 06 Nov 2017 13:08:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1da97d4e-17c3-4320-bd63-2b6e79c81483Jakub Rzeszutko<p>What will happen if you will increase RTT upstream buffer in SDK config (SEGGER_RTT_CONFIG_BUFFER_SIZE_DOWN) ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/103479?ContentTypeID=1Mon, 06 Nov 2017 12:18:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:88bc3c85-b7db-461a-a36d-6d5fbf1cb486J&#248;rn<p>Hello nemunoz</p> <p>I apologize for the late answer. I did some testing and from what I can tell the MCU is moving too fast for the RTT to keep up. I had sporadic jumps in counter value. When I introduced a delay between printing and restarting the counter loop everything worked as intended.</p> <p>Best regards</p> <p>Jørn Frøysa</p><div style="clear:both;"></div>