bt_hci_core: bt_enable: No HCI driver registered Bluetooth init failed (err -19)https://devzone.nordicsemi.com/f/nordic-q-a/111455/bt_hci_core-bt_enable-no-hci-driver-registered-bluetooth-init-failed-err--19Hi, I&#39;m having some problems with the BLE role peripheral not being able to play ads and not being able to enable bluetooth. When I upgraded from sdk v2.4.2 to v2.6.0 it seems to no longer be able to initiate bluetooth and play ads. fox. Besides, readingen-USTelligent Community 13Fri, 24 May 2024 07:27:37 GMTRE: bt_hci_core: bt_enable: No HCI driver registered Bluetooth init failed (err -19)https://devzone.nordicsemi.com/thread/485728?ContentTypeID=1Fri, 24 May 2024 07:27:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c2504a77-beb0-4be2-8a2f-0a550b7f15dfSimonr<p>Hi</p> <p>What sample is your project based on exactly? This error points to there not being an HCI driver registered at all. Can you confirm that&nbsp;<span>CONFIG_BT_HCI=y is set in your prj.conf, as well as upload what Bluetooth HCI driver is used with&nbsp;<a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/kconfig/index.html#CONFIG_BT_HCI_BUS_TYPE">CONFIG_BT_HCI_BUS_TYPE</a>.&nbsp;</span></p> <p><span>Best regards,</span></p> <p><span>Simon</span></p><div style="clear:both;"></div>