https://devzone.nordicsemi.com/f/nordic-q-a/39227/nrf52840-not-detected-when-using-usbd-cdc-exampleI have made a custom board based on the raytac NRF52840 module (MDBT50). When i load in the USBD CDC example (SDK version: 15.2), The device is not detected. There is no output on the &#39;dmesg&#39; (my OS is Ubuntu 16.04). What could be the problem? Do i needen-USTelligent Community 13Mon, 08 Oct 2018 17:05:11 GMThttps://devzone.nordicsemi.com/thread/152104?ContentTypeID=1Mon, 08 Oct 2018 17:05:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:14190512-4c02-49aa-abcb-5f2282f5a268rgujju<p>It has started working now, It was probably a soldering issue. To confirm that i soldered it properly this time I checked the resistance between the D+ and D- pins with ground.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/151921?ContentTypeID=1Sun, 07 Oct 2018 12:27:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:305a192c-1b0e-4038-994f-52ddd66443dfrgujju<p>That is the problem right. if it were pulling D+ line to around 3V it would have printed something on &#39;dmesg&#39;. But it isnt pulling to 3V</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/151918?ContentTypeID=1Sun, 07 Oct 2018 09:51:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bf5b1794-6115-462a-b243-0cb1beb7db00Turbo J<p>Triple check the USB data lines - especially D+ line. You could also try to measure voltage - once USB is active it should be pulled to around 3V.</p><div style="clear:both;"></div>