https://devzone.nordicsemi.com/f/nordic-q-a/60475/why-my-board-can-t-broadcast1.when i use the example on the dir : examples\ble_peripheral\ble_app_blinky\pca10056\s140\arm5_no_packs i have sucess flash the softdevice and the app: the console show like that: &lt;info&gt; app_timer: RTC: initialized. &lt;info&gt; app: Blinky example starteden-USTelligent Community 13Wed, 22 Apr 2020 02:51:22 GMThttps://devzone.nordicsemi.com/thread/245930?ContentTypeID=1Wed, 22 Apr 2020 02:51:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:02190e19-eb7b-4f7b-bf37-7aa8715104e8flywithme<p>thanks a lot</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/245907?ContentTypeID=1Tue, 21 Apr 2020 19:17:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:22d8be06-32e0-4b23-b2f6-bf6a39cf910dAndreas<p>Hi,</p> <p>&nbsp;</p> <p>&nbsp;</p> [quote user=""]i have change the ic from 52832 to the 52840[/quote] <p>&nbsp;This is not possible, they are not pin-compatible. Do you mean you changed from the Engineering revision A that was originally on the PCA10056 v0.9.2 to revision 2, as indicated by QIAA<strong>D</strong>0 on the second image? If so your answer is explained in this blog post:&nbsp;<a href="https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/difference-between-nrf52840-engineering-a-and-b-re">https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/difference-between-nrf52840-engineering-a-and-b-re</a></p> <p>&nbsp;</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>