https://devzone.nordicsemi.com/f/nordic-q-a/39432/pca10056-nrf52840-q1aaaa-unstableI&#39;m finding my PCA10056 nRF52840 Q1AAAA development kit to be acting very strangely. 1) I takes almost 3x as long to program as a PCA10040 2) Generally I have to program it twice as the first time usually doesn&#39;t work 3) When debugging often iten-USTelligent Community 13Mon, 15 Oct 2018 12:01:06 GMThttps://devzone.nordicsemi.com/thread/152863?ContentTypeID=1Mon, 15 Oct 2018 12:01:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b8589840-c380-4993-bfef-804ca87687f2Kenneth<p>Hi,</p> <p>You are using a very early engineering version of the nRF52840 that is not tested. Make sure to order a new nRF52840-DK, they are all using the production hardware revision of the nRF52840 now (PCA10056 v1.0.0, build code QIAAC0).</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>