Hi Jamie, I'm very sorry for late reply. I was busy with other urgent works. Could you check this log? Why is "Removing temporary device..." happening? =============== first connection and pairing with my android test app : connect -> bonded -> disconnect from app =================================== Dec 17 07:35:38 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_ref() 0xfd1000: ref=1 Dec 17 07:35:38 bluetoothd[368]: ../bluez-5.50/src/agent.c:register_agent() agent :1.49 Dec 17 07:35:38 bluetoothd[368]: ../bluez-5.50/src/agent.c:unregister_agent() agent :1.49 Dec 17 07:35:38 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_disconnect() Agent :1.49 disconnected Dec 17 07:35:38 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_destroy() agent :1.49 Dec 17 07:35:38 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_unref() 0xfd1000: ref=0 Dec 17 07:35:38 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_ref() 0xfd1000: ref=1 Dec 17 07:35:38 bluetoothd[368]: ../bluez-5.50/src/agent.c:register_agent() agent :1.49 Dec 17 07:35:38 bluetoothd[368]: ../bluez-5.50/src/agent.c:add_default_agent() Default agent set to :1.49 /org/bluez/agent Dec 17 07:35:46 bluetoothd[368]: ../bluez-5.50/src/adapter.c:connected_callback() hci0 device 5C:CB:99:7F:77:02 connected eir_len 0 Dec 17 07:35:47 bluetoothd[368]: ../bluez-5.50/src/adapter.c:user_passkey_notify_callback() hci0 5C:CB:99:7F:77:02 Dec 17 07:35:47 bluetoothd[368]: ../bluez-5.50/src/adapter.c:user_passkey_notify_callback() passkey 859060 entered 0 Dec 17 07:35:47 bluetoothd[368]: ../bluez-5.50/src/device.c:new_auth() Requesting agent authentication for 5C:CB:99:7F:77:02 Dec 17 07:35:47 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_ref() 0xfd1000: ref=2 Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/adapter.c:new_irk_callback() hci0 new IRK for 5C:CB:99:7F:77:02 RPA 00:00:00:00:00:00 Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/adapter.c:new_csrk_callback() hci0 new CSRK for 5C:CB:99:7F:77:02 type 3 Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/adapter.c:new_csrk_callback() hci0 new CSRK for 5C:CB:99:7F:77:02 type 2 Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/adapter.c:new_long_term_key_callback() hci0 new LTK for 5C:CB:99:7F:77:02 type 1 enc_size 16 Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/device.c:device_set_bonded() Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/device.c:device_bonding_complete() bonding (nil) status 0x00 Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_unref() 0xfd1000: ref=1 Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/adapter.c:resume_discovery() Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/adapter.c:new_long_term_key_callback() hci0 new LTK for 5C:CB:99:7F:77:02 type 1 enc_size 16 Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/device.c:device_set_bonded() Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/device.c:device_bonding_complete() bonding (nil) status 0x00 Dec 17 07:35:56 bluetoothd[368]: ../bluez-5.50/src/adapter.c:resume_discovery() Dec 17 07:36:15 bluetoothd[368]: ../bluez-5.50/src/adapter.c:dev_disconnected() Device 5C:CB:99:7F:77:02 disconnected, reason 3 Dec 17 07:36:15 bluetoothd[368]: ../bluez-5.50/src/adapter.c:adapter_remove_connection() Dec 17 07:36:15 bluetoothd[368]: ../bluez-5.50/plugins/policy.c:disconnect_cb() reason 3 Dec 17 07:36:15 bluetoothd[368]: ../bluez-5.50/src/adapter.c:bonding_attempt_complete() hci0 bdaddr 5C:CB:99:7F:77:02 type 1 status 0xe Dec 17 07:36:15 bluetoothd[368]: ../bluez-5.50/src/device.c:device_bonding_complete() bonding (nil) status 0x0e Dec 17 07:36:15 bluetoothd[368]: ../bluez-5.50/src/device.c:device_bonding_failed() status 14 Dec 17 07:36:15 bluetoothd[368]: ../bluez-5.50/src/adapter.c:resume_discovery() Dec 17 07:36:36 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_disconnect() Agent :1.49 disconnected Dec 17 07:36:36 bluetoothd[368]: ../bluez-5.50/src/agent.c:remove_default_agent() Default agent cleared Dec 17 07:36:36 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_destroy() agent :1.49 Dec 17 07:36:36 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_unref() 0xfd1000: ref=0 Dec 17 07:36:37 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_ref() 0xfd2808: ref=1 Dec 17 07:36:37 bluetoothd[368]: ../bluez-5.50/src/agent.c:register_agent() agent :1.51 Dec 17 07:36:37 bluetoothd[368]: ../bluez-5.50/src/agent.c:unregister_agent() agent :1.51 Dec 17 07:36:37 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_disconnect() Agent :1.51 disconnected Dec 17 07:36:37 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_destroy() agent :1.51 Dec 17 07:36:37 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_unref() 0xfd2808: ref=0 ============= second connection : this device unpaired unintentionally from the app system as soon as connected =================================== Dec 17 07:36:37 bluetoothd[368]: ../bluez-5.50/src/agent.c:agent_ref() 0xfd2808: ref=1 Dec 17 07:36:37 bluetoothd[368]: ../bluez-5.50/src/agent.c:register_agent() agent :1.51 Dec 17 07:36:37 bluetoothd[368]: ../bluez-5.50/src/agent.c:add_default_agent() Default agent set to :1.51 /org/bluez/agent Dec 17 07:36:42 bluetoothd[368]: ../bluez-5.50/src/adapter.c:connected_callback() hci0 device 4D:EE:4F:F1:6F:FD connected eir_len 0 Dec 17 07:36:42 bluetoothd[368]: ../bluez-5.50/src/device.c:device_create() dst 4D:EE:4F:F1:6F:FD Dec 17 07:36:42 bluetoothd[368]: ../bluez-5.50/src/device.c:device_new() address 4D:EE:4F:F1:6F:FD Dec 17 07:36:42 bluetoothd[368]: ../bluez-5.50/src/device.c:device_new() Creating device /org/bluez/hci0/dev_4D_EE_4F_F1_6F_FD Dec 17 07:36:43 bluetoothd[368]: ../bluez-5.50/src/adapter.c:dev_disconnected() Device 4D:EE:4F:F1:6F:FD disconnected, reason 3 Dec 17 07:36:43 bluetoothd[368]: ../bluez-5.50/src/adapter.c:adapter_remove_connection() Dec 17 07:36:43 bluetoothd[368]: ../bluez-5.50/src/adapter.c:adapter_remove_connection() Removing temporary device /org/bluez/hci0/dev_4D_EE_4F_F1_6F_FD Dec 17 07:36:43 bluetoothd[368]: ../bluez-5.50/src/device.c:device_remove() Removing device /org/bluez/hci0/dev_4D_EE_4F_F1_6F_FD Dec 17 07:36:43 bluetoothd[368]: ../bluez-5.50/src/device.c:btd_device_unref() Freeing device /org/bluez/hci0/dev_4D_EE_4F_F1_6F_FD Dec 17 07:36:43 bluetoothd[368]: ../bluez-5.50/src/device.c:device_free() 0xff3058 Dec 17 07:36:43 bluetoothd[368]: ../bluez-5.50/plugins/policy.c:disconnect_cb() reason 3 Dec 17 07:36:43 bluetoothd[368]: ../bluez-5.50/src/adapter.c:bonding_attempt_complete() hci0 bdaddr 4D:EE:4F:F1:6F:FD type 2 status 0xe Dec 17 07:36:43 bluetoothd[368]: ../bluez-5.50/src/adapter.c:resume_discovery() Thanks, Calvin 2020년 11월 27일 (금) 오후 5:43, Jamie Mccrae <Jamie.Mccrae@xxxxxxxxxxxxxxxx>님이 작성: > > Hi Calvin, > What type of address is it? If the device has a random resolvable address then this means once the device has paired and exchanged IRK that regardless of what random resolvable address the device uses, the other device will always know what the device's true address is and will use the correct encryption keys and details. If the device has a different random non-resolvable address or random static address which changes then you cannot match these against a pairing. > Thanks, > Jamie > > -----Original Message----- > From: C K <choongbeom@xxxxxxxxx> > Sent: 27 November 2020 06:46 > To: linux-bluetooth@xxxxxxxxxxxxxxx > Subject: BlueZ “Pin or Key missing” occurred even though it has already been paired > > EXTERNAL EMAIL: Be careful with attachments and links. > > Hello, > I have an issue with my bluez device. > I explained it on stackover flow. > Help me about this please. > > https://stackoverflow.com/questions/65001891/bluez-pin-or-key-missing-occurred-even-though-it-has-already-been-paired > > > Thanks, > Calvin > THIS MESSAGE, ANY ATTACHMENT(S), AND THE INFORMATION CONTAINED HEREIN MAY BE PROPRIETARY TO LAIRD CONNECTIVITY, INC. AND/OR ANOTHER PARTY, AND MAY FURTHER BE INTENDED TO BE KEPT CONFIDENTIAL. 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