https://devzone.nordicsemi.com/f/nordic-q-a/79774/debugging-without-the-power-supply-with-usbHi There, Now, I want to supply energy on the board with external power. As to say, I cannot supply power on the board by USB. In this condition, can I connect the board with a USB to debug or log the boards? Regards, Gaosheng Liuen-USTelligent Community 13Mon, 20 Sep 2021 14:47:11 GMThttps://devzone.nordicsemi.com/thread/330325?ContentTypeID=1Mon, 20 Sep 2021 14:47:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7712fab3-7f32-426d-b01d-aac12089b0d0lgs<p>Thank you very much!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/330170?ContentTypeID=1Mon, 20 Sep 2021 07:34:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5ee70f9d-938c-4985-912a-2d656f89d039ketiljo<p>Won&#39;t it be easier to just supply it from USB and measure the current when you&#39;re debugging?&nbsp;<a href="https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/dk/hw_measure_current.html">https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/dk/hw_measure_current.html</a></p> <p>How to debug with another debugger_&nbsp;<a href="https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/dk/hw_debug_in_trace.html">https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/dk/hw_debug_in_trace.html</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/330083?ContentTypeID=1Fri, 17 Sep 2021 14:18:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ce90befa-9c89-48af-87c8-63884a8edd49lgs<p>What&#39;s the external debugger? How to debug?</p> <p>I mean I want to log the board with the USB plugged in my PC, but not supply power. The power is supplied by external power sources.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/330074?ContentTypeID=1Fri, 17 Sep 2021 13:52:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:784ae4aa-6307-4bc4-a78b-868e06d3416aketiljo<p>Not unless you an external or separate debugger.</p><div style="clear:both;"></div>