https://devzone.nordicsemi.com/f/nordic-q-a/25973/can-not-disable-rx-or-txi need to disable RX when data was transmit and enable RX again when data transmit complete. i tried : NRF_UART0-&gt;TASKS_STOPRX = 1; NRF_UART0-&gt;TASKS_STARTRX=1; NRF_UART0-&gt;TASKS_STOPTX=1; NRF_UART0-&gt;TASKS_STARTX=1; ( i use SDK11 pca10028)en-USTelligent Community 13Thu, 19 Oct 2017 10:38:54 GMThttps://devzone.nordicsemi.com/thread/102335?ContentTypeID=1Thu, 19 Oct 2017 10:38:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5c90738c-a7c3-4390-9dc1-df04bb3c2d02Bj&#248;rn Kvaale<p><a href="https://devzone.nordicsemi.com/question/1119/handling-the-uart-when-sleeping/">Here&#39;s a link</a> to some code.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/102334?ContentTypeID=1Wed, 18 Oct 2017 15:27:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:da243366-fc1c-48b3-aa6b-8cc3921dc073phanhust<p>i tried, but nothing happend. could you show me more detail or maybe your code. thanks</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/102333?ContentTypeID=1Tue, 17 Oct 2017 07:27:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9adc0982-e346-40d6-a599-1f54cf46fb36Bj&#248;rn Kvaale<p>Have you taken a look at <a href="https://devzone.nordicsemi.com/question/75841/about-a-procedure-with-uart-as-disable/">this case</a>?</p><div style="clear:both;"></div>