https://devzone.nordicsemi.com/f/nordic-q-a/35985/nrf52840-detection-in-linux-pcHi all, What I need to do for detection of nRF52840 PDK as /dev/ttyUSB0 when connected to LINUX PC? I have tried all serial examples but every one is detecting PDK as /dev/ttyACM0 after connecting USB to micro USB cable to J2 power source port nearen-USTelligent Community 13Tue, 03 Jul 2018 08:43:59 GMThttps://devzone.nordicsemi.com/thread/138699?ContentTypeID=1Tue, 03 Jul 2018 08:43:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a214dcc4-2068-4902-baae-3793e365b85eH&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>The segger IC (USB connection &quot;J2&quot;) will always enumerate as a ACM device, as it is a USB com port emulator. It will also enumerate a mass storage device (/dev/sdX).</p> <p>In order to enumerate the nRF52840 over USB, you need to connect to connect J3, also marked &quot;nRF USB&quot;.</p> <p>I see that you are using the PDK. Note that we do strongly recommend that you obtain the latest silicon version, which is revision 1. Engineering sample A workarounds for USB has been removed from the SDK from v15.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p> <p>&nbsp;</p><div style="clear:both;"></div>