NRF52840 USB stucks after whilehttps://devzone.nordicsemi.com/f/nordic-q-a/26586/nrf52840-usb-stucks-after-whileHi, i am checking NRF52840 for USB behaviour. I&#39;m using example usbd_cdc_acm. But USB receiving stucks after few bytes (between 0 and 50) and does not receives nothing more. I corrected the buffer size as recommended in devzone.nordicsemi.comen-USTelligent Community 13Sun, 05 Nov 2017 22:32:31 GMTRE: NRF52840 USB stucks after whilehttps://devzone.nordicsemi.com/thread/104568?ContentTypeID=1Sun, 05 Nov 2017 22:32:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:da933d5b-e23d-4698-a75e-05aa5622012aSigurd<p>Hi,</p> <p>From your description, I suspect it could be a issue with your nRF52840-PDK board. Please create a <a href="https://www.nordicsemi.com/eng/Support-Community/Contact-Support-Team">Mypage</a> support case ticket regarding this issue, and we will find a solution for you. Remember to add the information about the board version in the MyPage ticket.</p><div style="clear:both;"></div>RE: NRF52840 USB stucks after whilehttps://devzone.nordicsemi.com/thread/104567?ContentTypeID=1Sun, 05 Nov 2017 16:49:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d2ce65d8-7fa7-4af1-a793-500f1525f74fmartin.richter.supervag<ul> <li>nRF5_SDK_14.1.0_1dda907, no softdevice</li> <li>PCA 10056, V0.9.2, 2017.33, 683265658 bought by mouser.com</li> <li>a have only one pc of 52840 PDK</li> <li>no custom boards with &quot;engineer sample&quot;.</li> </ul> <p>Problem is not by sending the bytes to the computer, but with receiving bytes from the PC.</p><div style="clear:both;"></div>RE: NRF52840 USB stucks after whilehttps://devzone.nordicsemi.com/thread/104566?ContentTypeID=1Sat, 04 Nov 2017 15:00:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1ef8a71a-e896-4f34-a7de-d23dca4f94cbSigurd<p>Hi,</p> <p>Please provide some more information.</p> <ul> <li> <p>What SDK version are you using?</p> </li> <li> <p>What version of the nRF52840 PDK are you using? It should be printed below PCA10056 on the sticker on the kit.</p> </li> <li> <p>Do you have more than 1 nRF52840-PDK you can test with?</p> </li> <li> <p>Do you have custom boards using &quot;engineer samples&quot; ?</p> </li> </ul> <p>If you are using engineer samples:</p> <ul> <li>How many of these custom boards with engineer samples do you have ?</li> <li>What is the build code on the engineer samples?</li> </ul><div style="clear:both;"></div>