The state status is Unknown(147) after FOTA DFU on 54L15

Hello there,

Working on bringing up the FOTA feature on the 54L15. I began with the LBS example.  I was using the Nordic "Device Manage" to push the FOTA build. 

The state flow changes as:  "Uploading"  /  "Resetting"  /  "Confirming" / "UNKNOWN(147)".  The build has been uploaded successfully, but this "unknown" state bothers me. 

Then I used "nRF Connect" to build the connection and run the same DFU for the progress log (attached below).  I wonder if this "unknown state" is something I need concern. 

Thank you in advance. 

nRF Connect, 2025-02-20
Nordic_LBS (EA:0B:16:96:F4:6D)
V 10:12:51.625 [McuMgr] Connecting...
D 10:12:51.629 [McuMgr] gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE, LE 1M)
D 10:12:51.659 [McuMgr] [Callback] Connection state changed with status: 0 and new state: 2 (CONNECTED)
I 10:12:51.661 [McuMgr] Connected to EA:0B:16:96:F4:6D
D 10:12:51.662 [McuMgr] wait(300)
V 10:12:51.965 [McuMgr] Discovering services...
D 10:12:51.975 [McuMgr] gatt.discoverServices()
I 10:12:51.999 [McuMgr] Services discovered
V 10:12:52.003 [McuMgr] Primary service found
V 10:12:52.007 [McuMgr] Requesting new MTU...
D 10:12:52.010 [McuMgr] gatt.requestMtu(498)
I 10:12:52.090 [McuMgr] MTU changed to: 498
D 10:12:52.100 [McuMgr] gatt.setCharacteristicNotification(da2e7828-fbce-4e01-ae9e-261174997c48, true)
V 10:12:52.103 [McuMgr] Enabling notifications for da2e7828-fbce-4e01-ae9e-261174997c48
D 10:12:52.105 [McuMgr] gatt.writeDescriptor(00002902-0000-1000-8000-00805f9b34fb, value=0x01-00)
I 10:12:52.208 [McuMgr] Data written to descr. 00002902-0000-1000-8000-00805f9b34fb
V 10:12:52.219 [McuMgr] Waiting for value change...
V 10:12:52.223 [McuMgr] Writing characteristic da2e7828-fbce-4e01-ae9e-261174997c48 (WRITE COMMAND)
D 10:12:52.225 [McuMgr] gatt.writeCharacteristic(da2e7828-fbce-4e01-ae9e-261174997c48, value=0x000000010000FF06A0, WRITE COMMAND)
I 10:12:52.234 [McuMgr] Data written to da2e7828-fbce-4e01-ae9e-261174997c48
I 10:12:52.296 [McuMgr] Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 01-00-00-19-00-00-FF-06-BF-68-62-75-66-5F-73-69-7A-65-19-09-AB-69-62-75-66-5F-63-6F-75-6E-74-04-FF
I 10:12:52.298 [McuMgr] Wait for value changed complete
A 10:12:52.300 [McuMgr] Received Header (Version: 0, Op: 1, Flags: 0, Len: 25, Group: 0, Seq: 255, Command: 6) CBOR {"buf_size":2475,"buf_count":4}
I 10:12:52.309 [McuMgr] SMP reassembly supported with buffer size: 2475 bytes and count: 4
V 10:12:52.311 [McuMgr] Requesting connection priority: HIGH (11.25–15ms, 0, 5s)...
D 10:12:52.312 [McuMgr] gatt.requestConnectionPriority(HIGH)
A 10:12:52.328 [McuMgr] Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 0, Command: 8) CBOR {}
V 10:12:52.516 [McuMgr] Writing characteristic da2e7828-fbce-4e01-ae9e-261174997c48 (WRITE COMMAND)
D 10:12:52.530 [McuMgr] gatt.writeCharacteristic(da2e7828-fbce-4e01-ae9e-261174997c48, value=0x0800000100000008A0, WRITE COMMAND)
I 10:12:52.553 [McuMgr] Data written to da2e7828-fbce-4e01-ae9e-261174997c48
I 10:12:52.603 [McuMgr] Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 09-00-00-15-00-00-00-08-BF-6A-62-6F-6F-74-6C-6F-61-64-65-72-67-4D-43-55-62-6F-6F-74-FF
I 10:12:52.604 Connection parameters updated (interval: 11.25ms, latency: 0, timeout: 420ms)
I 10:12:52.609 [McuMgr] Connection parameters updated (interval: 11.25ms, latency: 0, timeout: 420ms)
A 10:12:52.612 [McuMgr] Received Header (Version: 1, Op: 1, Flags: 0, Len: 21, Group: 0, Seq: 0, Command: 8) CBOR {"bootloader":"MCUboot"}
A 10:12:52.619 [McuMgr] Sending (20 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 12, Group: 0, Seq: 1, Command: 8) CBOR {"query":"mode"}
V 10:12:52.623 [McuMgr] Writing characteristic da2e7828-fbce-4e01-ae9e-261174997c48 (WRITE COMMAND)
D 10:12:52.645 [McuMgr] gatt.writeCharacteristic(da2e7828-fbce-4e01-ae9e-261174997c48, value=0x0800000C00000108A1657175657279646D6F6465, WRITE COMMAND)
I 10:12:52.654 [McuMgr] Data written to da2e7828-fbce-4e01-ae9e-261174997c48
I 10:12:52.695 [McuMgr] Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 09-00-00-08-00-00-01-08-BF-64-6D-6F-64-65-03-FF
A 10:12:52.700 [McuMgr] Received Header (Version: 1, Op: 1, Flags: 0, Len: 8, Group: 0, Seq: 1, Command: 8) CBOR {"mode":3}
I 10:12:52.718 Connection parameters updated (interval: 15.0ms, latency: 0, timeout: 5000ms)
A 10:12:52.724 [McuMgr] Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 1, Seq: 2, Command: 0) CBOR {}
V 10:12:52.731 [McuMgr] Writing characteristic da2e7828-fbce-4e01-ae9e-261174997c48 (WRITE COMMAND)
D 10:12:52.735 [McuMgr] gatt.writeCharacteristic(da2e7828-fbce-4e01-ae9e-261174997c48, value=0x0800000100010200A0, WRITE COMMAND)
I 10:12:52.742 [McuMgr] Connection parameters updated (interval: 15.0ms, latency: 0, timeout: 5000ms)
I 10:12:52.748 [McuMgr] Data written to da2e7828-fbce-4e01-ae9e-261174997c48
I 10:12:52.794 [McuMgr] Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 09-00-00-86-00-01-02-00-BF-66-69-6D-61-67-65-73-9F-BF-64-73-6C-6F-74-00-67-76-65-72-73-69-6F-6E-65-32-2E-39-2E-30-64-68-61-73-68-58-20-17-CB-1E-84-51-5E-24-82-5C-1A-FB-A8-42-82-50-16-25-2A-65-D7-A1-C8-6F-8F-AD-C5-74-1F-F3-EE-CF-77-68-62-6F-6F-74-61-62-6C-65-F5-67-70-65-6E-64-69-6E-67-F4-69-63-6F-6E-66-69-72-6D-65-64-F5-66-61-63-74-69-76-65-F5-69-70-65-72-6D-61-6E-65-6E-74-F4-FF-FF-6B-73-70-6C-69-74-53-74-61-74-75-73-00-FF
A 10:12:52.798 [McuMgr] Received Header (Version: 1, Op: 1, Flags: 0, Len: 134, Group: 1, Seq: 2, Command: 0) CBOR {"images":[{"slot":0,"version":"2.9.0","hash":"F8sehFFeJIJcGvuoQoJQFiUqZdehyG+PrcV0H/Puz3c=","bootable":true,"pending":false,"confirmed":true,"active":true,"permanent":false}],"splitStatus":0}
V 10:12:52.822 [McuMgr] Uploading firmware...
A 10:12:56.735 [McuMgr] 223448 bytes sent in 3802 ms (58.77 kB/s)
V 10:12:56.802 [McuMgr] New state: TEST
A 10:12:56.814 [McuMgr] Sending (57 bytes) Header (Version: 1, Op: 2, Flags: 0, Len: 49, Group: 1, Seq: 97, Command: 0) CBOR {"confirm":false,"hash":"HzzGrL14Rm51milVEjNuA/2+Fyci1kDIK4VYA/trUQM="}
V 10:12:56.819 [McuMgr] Writing characteristic da2e7828-fbce-4e01-ae9e-261174997c48 (WRITE COMMAND)
D 10:12:56.848 [McuMgr] gatt.writeCharacteristic(da2e7828-fbce-4e01-ae9e-261174997c48, value=0x0A00003100016100A267636F6E6669726DF4646861736858201F3CC6ACBD78466E759A295512336E03FDBE172722D640C82B855803FB6B5103, WRITE COMMAND)
I 10:12:56.868 [McuMgr] Data written to da2e7828-fbce-4e01-ae9e-261174997c48
I 10:12:56.894 [McuMgr] Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 0B-00-00-F4-00-01-61-00-BF-66-69-6D-61-67-65-73-9F-BF-64-73-6C-6F-74-00-67-76-65-72-73-69-6F-6E-65-32-2E-39-2E-30-64-68-61-73-68-58-20-17-CB-1E-84-51-5E-24-82-5C-1A-FB-A8-42-82-50-16-25-2A-65-D7-A1-C8-6F-8F-AD-C5-74-1F-F3-EE-CF-77-68-62-6F-6F-74-61-62-6C-65-F5-67-70-65-6E-64-69-6E-67-F4-69-63-6F-6E-66-69-72-6D-65-64-F5-66-61-63-74-69-76-65-F5-69-70-65-72-6D-61-6E-65-6E-74-F4-FF-BF-64-73-6C-6F-74-01-67-76-65-72-73-69-6F-6E-65-32-2E-39-2E-30-64-68-61-73-68-58-20-1F-3C-C6-AC-BD-78-46-6E-75-9A-29-55-12-33-6E-03-FD-BE-17-27-22-D6-40-C8-2B-85-58-03-FB-6B-51-03-68-62-6F-6F-74-61-62-6C-65-F5-67-70-65-6E-64-69-6E-67-F5-69-63-6F-6E-66-69-72-6D-65-64-F4-66-61-63-74-69-76-65-F4-69-70-65-72-6D-61-6E-65-6E-74-F4-FF-FF-6B-73-70-6C-69-74-53-74-61-74-75-73-00-FF
A 10:12:56.903 [McuMgr] Received Header (Version: 1, Op: 3, Flags: 0, Len: 244, Group: 1, Seq: 97, Command: 0) CBOR {"images":[{"slot":0,"version":"2.9.0","hash":"F8sehFFeJIJcGvuoQoJQFiUqZdehyG+PrcV0H/Puz3c=","bootable":true,"pending":false,"confirmed":true,"active":true,"permanent":false},{"slot":1,"version":"2.9.0","hash":"HzzGrL14Rm51milVEjNuA/2+Fyci1kDIK4VYA/trUQM=","bootable":true,"pending":true,"confirmed":false,"active":false,"permanent":false}],"splitStatus":0}
V 10:12:56.920 [McuMgr] New state: RESET
A 10:12:56.943 [McuMgr] Sending (9 bytes) Header (Version: 1, Op: 2, Flags: 0, Len: 1, Group: 0, Seq: 98, Command: 5) CBOR {}
V 10:12:56.949 [McuMgr] Writing characteristic da2e7828-fbce-4e01-ae9e-261174997c48 (WRITE COMMAND)
D 10:12:56.952 [McuMgr] gatt.writeCharacteristic(da2e7828-fbce-4e01-ae9e-261174997c48, value=0x0A00000100006205A0, WRITE COMMAND)
I 10:12:56.959 [McuMgr] Data written to da2e7828-fbce-4e01-ae9e-261174997c48
I 10:12:56.999 [McuMgr] Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 0B-00-00-02-00-00-62-05-BF-FF
A 10:12:57.005 [McuMgr] Received Header (Version: 1, Op: 3, Flags: 0, Len: 2, Group: 0, Seq: 98, Command: 5) CBOR {}
D 10:13:02.283 [Server callback] Connection state changed with status: 0 and new state: DISCONNECTED (0)
I 10:13:02.283 [Server] Device disconnected
D 10:13:02.294 [Callback] Connection state changed with status: 8 and new state: DISCONNECTED (0)
E 10:13:02.294 Error 8 (0x8): GATT CONN TIMEOUT
I 10:13:02.294 Disconnected
D 10:13:02.321 [McuMgr] [Callback] Connection state changed with status: 8 and new state: 0 (DISCONNECTED)
W 10:13:02.324 [McuMgr] Error: (0x8): GATT CONN TIMEOUT
I 10:13:02.326 [McuMgr] Disconnected
D 10:13:02.330 [McuMgr] gatt.close()
D 10:13:02.333 [Broadcast] Action received: android.bluetooth.device.action.ACL_DISCONNECTED
V 10:13:07.025 [McuMgr] Connecting...
D 10:13:07.037 [McuMgr] gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE, LE 1M)
V 10:13:07.052 [McuMgr] New state: CONFIRM
D 10:13:37.110 [Server callback] Connection state changed with status: 0 and new state: DISCONNECTED (0)
I 10:13:37.110 [Server] Device disconnected
D 10:13:37.115 [McuMgr] [Callback] Connection state changed with status: 147 and new state: 0 (DISCONNECTED)
W 10:13:37.126 [McuMgr] Error: (0x93): UNKNOWN (147)
W 10:13:37.130 [McuMgr] Connection attempt timed out
D 10:13:37.136 [McuMgr] gatt.close()
D 10:13:37.146 gatt.close()
D 10:13:37.148 wait(200)
V 10:13:37.350 Connecting to EA:0B:16:96:F4:6D...
D 10:13:37.351 gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE, preferred PHY = LE 1M)
D 10:13:59.616 [Server callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I 10:13:59.617 [Server] Device with address EA:0B:16:96:F4:6D connected
D 10:13:59.643 [Callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I 10:13:59.643 Connected to EA:0B:16:96:F4:6D
V 10:13:59.644 Discovering services...
D 10:13:59.644 gatt.discoverServices()
D 10:13:59.649 [Callback] Services discovered with status: 0
I 10:13:59.649 Services discovered
V 10:13:59.652 Generic Attribute (0x1801)
- Service Changed [I] (0x2A05)
   Client Characteristic Configuration (0x2902)
- Client Supported Features [R W] (0x2B29)
- Database Hash [R] (0x2B2A)
Generic Access (0x1800)
- Device Name [R] (0x2A00)
- Appearance [R] (0x2A01)
- Peripheral Preferred Connection Parameters [R] (0x2A04)
Nordic LED Button Service (00001523-1212-efde-1523-785feabcd123)
- Button [N R] (00001524-1212-efde-1523-785feabcd123)
   Client Characteristic Configuration (0x2902)
- LED [W] (00001525-1212-efde-1523-785feabcd123)
SMP Service (8d53dc1d-1db7-4cd3-868b-8a527460aa84)
- SMP Characteristic [N WNR] (da2e7828-fbce-4e01-ae9e-261174997c48)
   Client Characteristic Configuration (0x2902)
D 10:13:59.653 gatt.setCharacteristicNotification(00002a05-0000-1000-8000-00805f9b34fb, true)
D 10:13:59.654 gatt.setCharacteristicNotification(00001524-1212-efde-1523-785feabcd123, true)
I 10:14:00.016 [Server] PHY updated (TX: LE 2M, RX: LE 2M)
I 10:14:00.016 PHY updated (TX: LE 2M, RX: LE 2M)
D 10:14:00.127 [Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED

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