https://devzone.nordicsemi.com/f/nordic-q-a/82708/nrf52840---usb-functionnality-without-vbusHello, Due to a routing error, the VBUS pin of the nRF52840 is connected to the GND. The software works on the devkit but not on my prototype. From what I saw in the product specification, it seems that it could be caused by the unconnecteden-USTelligent Community 13Mon, 13 Dec 2021 12:53:29 GMThttps://devzone.nordicsemi.com/thread/343171?ContentTypeID=1Mon, 13 Dec 2021 12:53:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:04096746-2b6a-42d3-9c98-adf47cba73e5aboulerie<p>Ok, thank you very much for your answer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/343123?ContentTypeID=1Mon, 13 Dec 2021 10:51:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:39f52c59-747d-41b6-a933-e9fa3e46b7dfTurbo J<p>No. The USB data pins are <em>powered</em> via VBUS.</p><div style="clear:both;"></div>