https://devzone.nordicsemi.com/f/nordic-q-a/100063/setting-bluetooth-mac-addressI am working on a very simple project. I have modified the bthome_sensor_template zephyr example to send a Bluetooth alert whenever a sensor is triggered, it works well so far. My problem is that whenever I power on the device I have to go in and reconnecten-USTelligent Community 13Wed, 24 May 2023 17:44:39 GMThttps://devzone.nordicsemi.com/thread/427322?ContentTypeID=1Wed, 24 May 2023 17:44:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0836256e-8319-4334-b4ae-e49353ac2f80Jduncan<p>I did what you said and I was still having trouble so I just went in and did a deeper debug. What I found out was that I needed to make my bt_le_adv_start &quot;param&quot; advertising parameter BT_LE_ADV_NCONN_IDENTITY to match my BT_LE_ADV_PARAM &quot;_options&quot; parameter. I also thought that my bt_addr_le_t address type needed to be BT_ADDR_LE_PUBLIC in order to set up a persistent MAC address, but it actually needed to be BT_ADDR_LE_RANDOM. Anyways using bt_id_create() before bt_enable()&nbsp;worked I just had some set up issues I needed to fix. My device works now, it shows up as the same device on each power up so I don&#39;t have to reconnect to it each time. Thanks Einer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/427087?ContentTypeID=1Wed, 24 May 2023 06:45:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3ee02d43-8309-4edd-8fcc-f3bef63ae9a1Einar Thorsrud<p>Hi,</p> <p>The address is private random by default. You can use a static random address by calling&nbsp;<code>bt_id_create()</code> before <code>bt_enable()</code>.</p><div style="clear:both;"></div>