https://devzone.nordicsemi.com/f/nordic-q-a/21691/uart-printfHi, I am playing with the SDK13 examples, UART (w/o softdevice). I use gnu gcc. The example runs and when I type q or Q the code goes to the printf(&quot; \r\nExit!\r\n&quot;) as designed. The problem is that I did not find a way to see that output on my terminalen-USTelligent Community 13Sun, 30 Apr 2017 18:31:12 GMThttps://devzone.nordicsemi.com/thread/85195?ContentTypeID=1Sun, 30 Apr 2017 18:31:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:180f51e7-202b-413c-9ebf-893d4194e61egian<p>ok there is a problem with the flow control. I have changed the structure: APP_UART_FLOW_CONTROL_ENABLED to APP_UART_FLOW_CONTROL_DISABLED, now I can see everything on screen.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/85194?ContentTypeID=1Fri, 28 Apr 2017 15:15:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:49fb7cf6-e377-43b6-b586-dc254c5085a8gian<p>I do not have a logic Analyzer</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/85193?ContentTypeID=1Fri, 28 Apr 2017 14:15:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fcc7ad99-b797-430d-ba77-1ee8bccb33a7gian<p>Ok, I did some additional test and I confirm I can receive correctly but I am not able to transmit. I am using a PCA10040. I have a CP2102. On the PCA10040 I have connected RXD (p0.08) to TXD (CP2102), TDX (p0.06) to RXD(CP2102) and RTS (p0.05) to CTS(CP2102).</p> <p>I have also installed another program iUARTAssistant...and I have the same results.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/85192?ContentTypeID=1Fri, 28 Apr 2017 13:12:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d264ae82-0440-49c9-99d3-86bb3d87af7bHung Bui<p>It seems that you only have RX on the device and no TX. Which hardware board are you using ? Have you made sure you connected all the UART pins properly ?</p> <p>Can you capture a logic analyzer trace on the UART pins ? And maybe a photo of your setup</p><div style="clear:both;"></div>