https://devzone.nordicsemi.com/f/nordic-q-a/66096/what-stops-the-nrf_log_-uart-logging-outputHi All, the logging output (NRF_LOG_...) in the SDK17 via the UART works fine on the DK board (only change from the HRS example was the NRF_LOG_BACKEND_UART_TX_PIN has been changed to p0.19). But on our board there is no output on that pin. UART seemsen-USTelligent Community 13Fri, 18 Sep 2020 11:24:42 GMThttps://devzone.nordicsemi.com/thread/270329?ContentTypeID=1Fri, 18 Sep 2020 11:24:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1d2b71b8-9f03-4b35-9ed0-94bdff43b0bfHugo Habicht<p>Hi All,</p> <p>we figured it out. The DK is running with a Vdd of 3V and our own board with an external battery and DC-DC giving a Vdd of 1.8V. The serial to USB converter of course does not read those signals so we&#39;ll put in a level shifter.</p> <p>I wanted to delete the post above but maybe it helps somebody stumbling into the same trap.</p> <p>Regards,</p><div style="clear:both;"></div>