https://devzone.nordicsemi.com/f/nordic-q-a/100323/unable-to-start-advertising-using-hci-uart-projectHi, I started a new project where a nRF52840 DK is used in controller mode to advertise sensor data. The board is flashed with the HCI UART project found in the Zephyr SDK. I executed successfully most of the HCI commands (i.e. scan), but I&#39;m unableen-USTelligent Community 13Tue, 06 Jun 2023 08:04:29 GMThttps://devzone.nordicsemi.com/thread/429475?ContentTypeID=1Tue, 06 Jun 2023 08:04:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:46d59b2f-95b2-4fb3-bff4-16a42184ceafGemoTech<p>Thanks Hung,&nbsp;</p> <p>It seems to work with this format.</p> <p>BR,<br />Gerald</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/428759?ContentTypeID=1Thu, 01 Jun 2023 13:28:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:120c50db-dd4b-483e-b4a2-8c3edc982c59Hung Bui<p>Hi Gemo,&nbsp;<br />I will try to take a look. But a quick comment is that the address of the advertiser need to follow a certain format of the MSB bits:</p> <p><br /><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1685626045523v1.png" alt=" " /></p> <p>(page 2678 in spec v 5.4)</p> <p></p> <p>My suggestion is to try to test in a nRF52840 BLE sample to see if the address is accepted before testing on the HCI commands. It&#39;s easier to debug and find what&#39;s wrong in the code.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/428736?ContentTypeID=1Thu, 01 Jun 2023 12:47:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7aae7213-a23d-42b7-bd8e-638f8482942fGemoTech<p>I just discovered that it works if a random address is assigned first. I tried before to set a static address but it didn&#39;t work.<br />What is the rule about the address assignment ?</p><div style="clear:both;"></div>