https://devzone.nordicsemi.com/f/nordic-q-a/3867/potential-problem-for-long-term-test-with-uart-enabledI&#39;m testing a data collecting program which samples data every 2s and reports it through UART ( printf(&quot;data=%d\r\n&quot;, data) ) on a PCA10001 board. I found this program may run into the error handler (FAILED) in some cases after running about 2 hours.en-USTelligent Community 13Mon, 22 Sep 2014 15:17:34 GMThttps://devzone.nordicsemi.com/thread/13931?ContentTypeID=1Mon, 22 Sep 2014 15:17:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a16777c7-f9a5-4e29-8cc4-e4f055c4456ascytulip<p>But isn&#39;t it 38400bps (4.8KB/s)? Why will it take more than 2s to send data? May you provide me some materials explaining the detailed UART operations? Thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/13930?ContentTypeID=1Mon, 22 Sep 2014 07:37:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:799d6163-1ea8-41d5-b9c7-af0e2dc7db8dNguyen Hoan Hoang<p>Because it could take more than 2s to send your data through UART at that baud rate.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/13929?ContentTypeID=1Mon, 22 Sep 2014 05:43:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78ec0a7c-4dc4-4b2d-bfb2-6463828b7d49scytulip<p>Seems OK. Do you know why?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/13928?ContentTypeID=1Sat, 20 Sep 2014 01:40:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78c69c7f-1b1d-418d-8977-3fbc43d36e80Nguyen Hoan Hoang<p>Have you tried a high UART speed say 115200 or higher ?</p><div style="clear:both;"></div>