https://devzone.nordicsemi.com/f/nordic-q-a/101340/blinky-fail-to-flash-nrf52840-dkHello, I just start to learn Nordic Nrf52840 DK device by following the instruction of nordic DevAcademy. This is my first time experience and I followed the instruction but I can not successfully flash blinky sample program to device. It is PCA10056en-USTelligent Community 13Thu, 29 Jun 2023 14:13:07 GMThttps://devzone.nordicsemi.com/thread/433729?ContentTypeID=1Thu, 29 Jun 2023 14:13:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b5d5928d-d785-460e-85e8-242e39115366Rem_sketch<p>Thank you, Susheel. Now, it works.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/433713?ContentTypeID=1Thu, 29 Jun 2023 13:37:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4b71737a-30c9-48dc-9ed5-1983f226ec5eSusheel Nuguru<p>seems like your chip has access protection enabled. Can you open the command prompt and type below to erase flash and clear access protection?</p> <p><pre class="ui-code" data-mode="text">nrfjprog --recover -f nrf52</pre></p><div style="clear:both;"></div>