https://devzone.nordicsemi.com/f/nordic-q-a/89478/how-are-addresses-handled-with-bleI noticed that if I set options = BT_LE_ADV_OPT_NONE in bt_le_adv_param I get a random address at each bootup and if I set it to BT_LE_ADV_OPT_USE_IDENTITY I get always the same address. My device is currently unconnectable (I only use BLE to detecten-USTelligent Community 13Thu, 30 Jun 2022 16:06:40 GMThttps://devzone.nordicsemi.com/thread/374964?ContentTypeID=1Thu, 30 Jun 2022 16:06:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5bc4e5d1-7048-4703-9679-8facd847871bdejans<p>Hi,<br /><br />BT_LE_ADV_OPT_NONE means that no options are specified.<br />BT_LE_ADV_OPT_USE_IDENTITY specifies advertising using local identity which preserves address after reboot.&nbsp;<br />You could check Advertising section in this&nbsp;<a href="https://devzone.nordicsemi.com/guides/nrf-connect-sdk-guides/b/software/posts/building-a-ble-application-on-ncs-comparing-and-contrasting-to-softdevice-based-ble-applications">guide</a>.<br />Bluetooth&nbsp;<a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/applications/nrf_desktop/doc/ble_bond.html#local-identities">local identity</a>&nbsp;is used by the Zephyr API. Every Bluetooth local identity has its own Bluetooth address and Identity Resolving Key (IRK).<br />You can also read more about&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/2084/gap-address-types">address types</a>&nbsp;and&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/27012/how-to-distinguish-between-random-and-public-gap-addresses">how to distinguish different addresses</a>.<br /><br />Best regards,<br />Dejan</p><div style="clear:both;"></div>