https://devzone.nordicsemi.com/f/nordic-q-a/80652/using-uart-on-donfle-with-an-external-power-supply-of-3-3vHi everybody, I am experience a strange thing with dongle. With a modified Uart example, i modified uart0 pinout to pins rx-&gt;1.13 and tx-&gt;1.15. I think thats pins are free and available to be uart0. Later and following the guide, i cut sb2 and solderen-USTelligent Community 13Fri, 15 Oct 2021 11:51:28 GMThttps://devzone.nordicsemi.com/thread/334333?ContentTypeID=1Fri, 15 Oct 2021 11:51:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e4329a13-a2b7-4886-9b16-6548f4eff586sotillo2409<p>Ok maybe that is, when arribe new dongles to my house, i burned 2 because of solder and desolder, but is okay i will try, now is working with 5v and the regulator, so enough at the momment.</p> <p>Thank you for the support Simonr.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/334292?ContentTypeID=1Fri, 15 Oct 2021 09:26:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c8dfdd17-f67c-4b11-9577-3ee3136c8dcdSimonr<p>Hi</p> <p>If you check out the <a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf52840%2Fpin.html&amp;anchor=aqfn73">pin assignments in the nRF52840 PS</a>, you&#39;ll see that P1.13 and P1.15 are recommended to only run as Standard drive, Low freq. I/Os. This is because they&#39;re located close to the radio, and may interfere with the radio performance when running at higher frequencies while the radio is active, which I&#39;m guessing why you don&#39;t see the data over BLE at all.</p> <p>Try using pins that do not have this recommended usage note instead, and I think you should be able to see that the device is able to receive and transmit data over BLE while the UART is active.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>