BLE bootloader failing on specific Android tablet

On Friady we were finishing off our final testing for our nRF5340 based product (SDK 2.1) when we discovered we couldnt do firmware updates from Samsung Galaxy Tab A8 tablets (Android 14). We developed the product using the Tab A9+'s which work fine (Android 14), and the bootloader is fine on our older Tab A (2016) and Tab A (2019) tablets which are Android 8/11.

We run our own Android app on them so removed that and am using your Device Manager app to remove our app as variable. Firmware app_update.bin is identical on all 4 tablets.

Works fine on 3 tablets, but not the A8's. Have tried multiple A8's and same failure on each other them.

Downloaded the Device Manager source from Github and have that on the A8 so I can capture the logs in Logcat

As far as the perpherial logging goes, it connects to the central, and then gets disconnected a few seconds later multiple times

[00:00:00.002,014] <inf> main: ~~~~~~~~
board: nrf5340dk_nrf5340_cpuapp
[00:00:00.002,014] <inf> main: build time: Jan 20 2025 15:45:57
[00:00:00.002,044] <inf> main: firmware version: 751
[00:00:01.504,730] <inf> main: MEMORY_SYSTEM_SIZE_HEARTBEATS: 138752
[00:00:01.506,958] <inf> main: Startup : NOT in Test Jig
[00:00:01.509,735] <inf> bluetooth: MAC Address: 00:48:A0:20:06:B8 (0x3c)
[00:00:01.509,765] <inf> taskBlinkLED: enableBlinkFor 5
[00:00:01.526,824] <inf> bluetooth: Bluetooth initialized
[00:00:01.529,327] <inf> bluetooth: Advertising successfully started
[00:00:10.150,207] <wrn> bt_hci_core: opcode 0x200a status 0x09
[00:00:10.150,390] <inf> bluetooth: Connected
[00:00:10.150,421] <inf> bleConnectionManager: onConnect
[00:00:10.150,421] <inf> taskBlinkLED: disableBlinkFor 5
[00:00:11.705,871] <inf> mcuboot_util: Swap type: none
[00:00:11.706,085] <inf> mcuboot_util: Swap type: none
[00:00:11.796,142] <inf> bluetooth: Connection parameters updated: interval 15 ms, latency 0 intervals, timeout 5000 ms
[00:00:11.796,142] <inf> taskRadio: Connection Parameters Changed
[00:00:16.850,128] <err> bluetooth: Disconnected (reason 0x08)
[00:00:16.850,158] <inf> bleConnectionManager: onDisconnect
[00:00:16.850,158] <wrn> taskRadio: Resetting states...
[00:00:16.850,219] <inf> taskBlinkLED: enableBlinkFor 5
[00:00:16.853,454] <inf> bluetooth: Advertising successfully started
[00:00:16.966,247] <wrn> bt_hci_core: opcode 0x200a status 0x09
[00:00:16.966,400] <inf> bluetooth: Connected
[00:00:16.966,430] <inf> bleConnectionManager: onConnect
[00:00:16.966,461] <inf> taskBlinkLED: disableBlinkFor 5
[00:00:23.269,775] <wrn> bt_hci_core: Not reporting packet for non-connected conn
[00:00:23.269,989] <err> bluetooth: Disconnected (reason 0x08)
[00:00:23.270,019] <inf> bleConnectionManager: onDisconnect
[00:00:23.270,050] <wrn> taskRadio: Resetting states...
[00:00:23.270,111] <inf> taskBlinkLED: enableBlinkFor 5
[00:00:23.273,315] <inf> bluetooth: Advertising successfully started
[00:00:24.331,481] <wrn> bt_hci_core: opcode 0x200a status 0x09
[00:00:24.331,634] <inf> bluetooth: Connected
[00:00:24.331,665] <inf> bleConnectionManager: onConnect
[00:00:24.331,695] <inf> taskBlinkLED: disableBlinkFor 5
[00:00:30.424,041] <wrn> bt_hci_core: Not reporting packet for non-connected conn
[00:00:30.424,255] <err> bluetooth: Disconnected (reason 0x08)
[00:00:30.424,285] <inf> bleConnectionManager: onDisconnect
[00:00:30.424,285] <wrn> taskRadio: Resetting states...
[00:00:30.424,346] <inf> taskBlinkLED: enableBlinkFor 5
[00:00:30.427,581] <inf> bluetooth: Advertising successfully started
[00:00:30.757,232] <wrn> bt_hci_core: opcode 0x200a status 0x09
[00:00:30.757,385] <inf> bluetooth: Connected
[00:00:30.757,415] <inf> bleConnectionManager: onConnect
[00:00:30.757,415] <inf> taskBlinkLED: disableBlinkFor 5

The below is the Android Logcat output. It failed when switching to UPLOAD and retries multiple times. My gut is that the perpherial firmware is doing something BT5 ish that the A8 cannot support but the A9 tablet does.....

McuMgrBleTransport        Connected to EB:3D:2C:D6:60:A0
BluetoothGatt             discoverServices() - device: XX:XX:XX:XX:60:A0
BluetoothGatt             onSearchComplete() = Device=XX:XX:XX:XX:60:A0 Status=0
McuMgrBleTransport        Services discovered
BluetoothGatt             configureMTU() - device: XX:XX:XX:XX:60:A0 mtu: 498
BluetoothGatt             onConfigureMTU() - Device=XX:XX:XX:XX:60:A0 mtu=252 status=0
McuMgrBleTransport        MTU changed to: 252
BluetoothGatt             setCharacteristicNotification() - uuid: da2e7828-fbce-4e01-ae9e-261174997c48 enable: true
McuMgrBleTransport        Data written to descr. 00002902-0000-1000-8000-00805f9b34fb
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 01-00-00-06-00-00-FF-06-BF-62-72-63-08-FF
McuMgrBleTransport        Wait for value changed complete
McuMgrBleTransport        Received Header (Version: 0, Op: 1, Flags: 0, Len: 6, Group: 0, Seq: 255, Command: 6) CBOR {"rc":8}
BluetoothGatt             onPhyRead() - status=0 address=XX:XX:XX:XX:60:A0 txPhy=1 rxPhy=1
McuMgrBleTransport        PHY read (TX: LE 1M, RX: LE 1M)
BluetoothGatt             requestConnectionPriority() - params: 1
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 0, Command: 8) CBOR {}
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 1, Command: 6) CBOR {}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 01-00-00-06-00-00-00-08-BF-62-72-63-08-FF
McuMgrBleTransport        Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 01-00-00-06-00-00-01-06-BF-62-72-63-08-FF
McuMgrBleTransport        Received Header (Version: 0, Op: 1, Flags: 0, Len: 6, Group: 0, Seq: 0, Command: 8) CBOR {"rc":8}
McuMgrBleTransport        Received Header (Version: 0, Op: 1, Flags: 0, Len: 6, Group: 0, Seq: 1, Command: 6) CBOR {"rc":8}
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 1, Seq: 2, Command: 0) CBOR {}
McuMgrBleTransport        Sending (19 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 11, Group: 0, Seq: 3, Command: 7) CBOR {"format":"sv"}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 01-00-00-F4-00-01-02-00-BF-66-69-6D-61-67-65-73-9F-BF-64-73-6C-6F-74-00-67-76-65-72-73-69-6F-6E-65-30-2E-30-2E-30-64-68-61-73-68-58-20-69-D0-38-C3-0A-49-D6-81-41-9A-A7-36-5A-4B-26-1A-51-12-86-03-17-E9-CB-DE-35-BB-D7-27-31-F5-66-16-68-62-6F-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-65-30-2E-30-2E-30-64-68-61-73-68-58-20-69-D0-38-C3-0A-49-D6-81-41-9A-A7-36-5A-4B-26-1A-51-12-86-03-17-E9-CB-DE-35-BB-D7-27-31-F5-66-16-68-62-6F-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-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
McuMgrBleTransport        Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 73-00-FF
McuMgrBleTransport        Received Header (Version: 0, Op: 1, Flags: 0, Len: 244, Group: 1, Seq: 2, Command: 0) CBOR {"images":[{"slot":0,"version":"0.0.0","hash":"adA4wwpJ1oFBmqc2WksmGlEShgMX6cveNbvXJzH1ZhY=","bootable":true,"pending":false,"confirmed":true,"active":true,"permanent":false},{"slot":1,"version":"0.0.0","hash":"adA4wwpJ1oFBmqc2WksmGlEShgMX6cveNbvXJzH1ZhY=","bootable":true,"pending":false,"confirmed":false,"active":false,"permanent":false}],"splitStatus":0}
Validate                  Validation response: {"images":[{"slot":0,"version":"0.0.0","hash":"adA4wwpJ1oFBmqc2WksmGlEShgMX6cveNbvXJzH1ZhY=","bootable":true,"pending":false,"confirmed":true,"active":true,"permanent":false},{"slot":1,"version":"0.0.0","hash":"adA4wwpJ1oFBmqc2WksmGlEShgMX6cveNbvXJzH1ZhY=","bootable":true,"pending":false,"confirmed":false,"active":false,"permanent":false}],"splitStatus":0}
FirmwareUp...ePerformer   Moving from state VALIDATE to state UPLOAD
ImageUpgradeViewModel     Uploading firmware...
McuMgrBleTransport        Sending (248 bytes) Header (Version: 1, Op: 2, Flags: 0, Len: 240, Group: 1, Seq: 4, Command: 1) CBOR {"data":"PbjzlgAAAAAAAgAAXFADAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////","len":218028,"sha":"2xpbY1ZHpNFAuX1m7jidoDKGaWDtiKgTfT7gkEqF500=","off":0}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 01-00-00-06-00-00-03-07-BF-62-72-63-08-FF
McuMgrBleTransport        Received Header (Version: 0, Op: 1, Flags: 0, Len: 6, Group: 0, Seq: 3, Command: 7) CBOR {"rc":8}
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 5, Command: 8) CBOR {}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
BluetoothGatt             onConnectionUpdated() - Device=XX:XX:XX:XX:60:A0 interval=12 latency=0 timeout=500 status=0
McuMgrBleTransport        Connection parameters updated (interval: 15.0ms, latency: 0, timeout: 5000ms)
BluetoothGatt             onClientConnectionState() - status=62 clientIf=5 device=XX:XX:XX:XX:60:A0
McuMgrBleTransport        Error: (0x3e): GATT CONN FAIL ESTABLISH
McuMgrBleTransport        Disconnected
BluetoothGatt             close()
BluetoothGatt             unregisterApp() - mClientIf=5
Uploader                  Uploader write failure for chunk with offset=0: io.runtime.mcumgr.ble.exception.McuMgrDisconnectedException
BluetoothAdapter          getBleEnabledArray(): ON
BluetoothGatt             connect() - device: XX:XX:XX:XX:60:A0, auto: false
BluetoothGatt             registerApp()
BluetoothGatt             registerApp() - UUID=1305d0c1-682b-47e8-9568-abea74c88fb2
BluetoothGatt             onClientRegistered() - status=0 clientIf=5
BluetoothAdapter          getBleEnabledArray(): ON
BluetoothGatt             onClientConnectionState() - status=0 clientIf=5 device=XX:XX:XX:XX:60:A0
McuMgrBleTransport        Connected to EB:3D:2C:D6:60:A0
BluetoothGatt             discoverServices() - device: XX:XX:XX:XX:60:A0
BluetoothGatt             onSearchComplete() = Device=XX:XX:XX:XX:60:A0 Status=0
McuMgrBleTransport        Services discovered
BluetoothGatt             configureMTU() - device: XX:XX:XX:XX:60:A0 mtu: 498
BluetoothGatt             onConfigureMTU() - Device=XX:XX:XX:XX:60:A0 mtu=252 status=0
McuMgrBleTransport        MTU changed to: 252
BluetoothGatt             setCharacteristicNotification() - uuid: da2e7828-fbce-4e01-ae9e-261174997c48 enable: true
McuMgrBleTransport        Data written to descr. 00002902-0000-1000-8000-00805f9b34fb
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 01-00-00-06-00-00-FF-06-BF-62-72-63-08-FF
McuMgrBleTransport        Wait for value changed complete
McuMgrBleTransport        Received Header (Version: 0, Op: 1, Flags: 0, Len: 6, Group: 0, Seq: 255, Command: 6) CBOR {"rc":8}
BluetoothGatt             onPhyRead() - status=0 address=XX:XX:XX:XX:60:A0 txPhy=1 rxPhy=1
McuMgrBleTransport        PHY read (TX: LE 1M, RX: LE 1M)
McuMgrBleTransport        Sending (248 bytes) Header (Version: 1, Op: 2, Flags: 0, Len: 240, Group: 1, Seq: 0, Command: 1) CBOR {"data":"PbjzlgAAAAAAAgAAXFADAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////","len":218028,"sha":"2xpbY1ZHpNFAuX1m7jidoDKGaWDtiKgTfT7gkEqF500=","off":0}
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 1, Command: 6) CBOR {}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Sending (19 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 11, Group: 0, Seq: 2, Command: 7) CBOR {"format":"sv"}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 3, Command: 8) CBOR {}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
BluetoothGatt             onClientConnectionState() - status=8 clientIf=5 device=XX:XX:XX:XX:60:A0
McuMgrBleTransport        Error: (0x8): GATT CONN TIMEOUT
McuMgrBleTransport        Disconnected
BluetoothGatt             close()
BluetoothGatt             unregisterApp() - mClientIf=5
Uploader                  Uploader write failure for chunk with offset=0: io.runtime.mcumgr.ble.exception.McuMgrDisconnectedException
BluetoothAdapter          getBleEnabledArray(): ON
BluetoothGatt             connect() - device: XX:XX:XX:XX:60:A0, auto: false
BluetoothGatt             registerApp()
BluetoothGatt             registerApp() - UUID=336bad41-11c9-419f-b6d3-e48e85476271
BluetoothGatt             onClientRegistered() - status=0 clientIf=5
BluetoothAdapter          getBleEnabledArray(): ON
BluetoothGatt             onClientConnectionState() - status=0 clientIf=5 device=XX:XX:XX:XX:60:A0
McuMgrBleTransport        Connected to EB:3D:2C:D6:60:A0
BluetoothGatt             discoverServices() - device: XX:XX:XX:XX:60:A0
BluetoothGatt             onSearchComplete() = Device=XX:XX:XX:XX:60:A0 Status=0
McuMgrBleTransport        Services discovered
BluetoothGatt             configureMTU() - device: XX:XX:XX:XX:60:A0 mtu: 498
BluetoothGatt             onConfigureMTU() - Device=XX:XX:XX:XX:60:A0 mtu=252 status=0
McuMgrBleTransport        MTU changed to: 252
BluetoothGatt             setCharacteristicNotification() - uuid: da2e7828-fbce-4e01-ae9e-261174997c48 enable: true
McuMgrBleTransport        Data written to descr. 00002902-0000-1000-8000-00805f9b34fb
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 01-00-00-06-00-00-FF-06-BF-62-72-63-08-FF
McuMgrBleTransport        Wait for value changed complete
McuMgrBleTransport        Received Header (Version: 0, Op: 1, Flags: 0, Len: 6, Group: 0, Seq: 255, Command: 6) CBOR {"rc":8}
BluetoothGatt             onPhyRead() - status=0 address=XX:XX:XX:XX:60:A0 txPhy=1 rxPhy=1
McuMgrBleTransport        PHY read (TX: LE 1M, RX: LE 1M)
McuMgrBleTransport        Sending (248 bytes) Header (Version: 1, Op: 2, Flags: 0, Len: 240, Group: 1, Seq: 0, Command: 1) CBOR {"data":"PbjzlgAAAAAAAgAAXFADAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////","len":218028,"sha":"2xpbY1ZHpNFAuX1m7jidoDKGaWDtiKgTfT7gkEqF500=","off":0}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 1, Command: 6) CBOR {}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Sending (19 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 11, Group: 0, Seq: 2, Command: 7) CBOR {"format":"sv"}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 3, Command: 8) CBOR {}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
BluetoothGatt             onClientConnectionState() - status=8 clientIf=5 device=XX:XX:XX:XX:60:A0
McuMgrBleTransport        Error: (0x8): GATT CONN TIMEOUT
McuMgrBleTransport        Disconnected
BluetoothGatt             close()
BluetoothGatt             unregisterApp() - mClientIf=5
Uploader                  Uploader write failure for chunk with offset=0: io.runtime.mcumgr.ble.exception.McuMgrDisconnectedException
BluetoothAdapter          getBleEnabledArray(): ON
BluetoothGatt             connect() - device: XX:XX:XX:XX:60:A0, auto: false
BluetoothGatt             registerApp()
BluetoothGatt             registerApp() - UUID=d335c2c5-2d9e-4c87-8697-ab1b89115fc2
BluetoothGatt             onClientRegistered() - status=0 clientIf=5
BluetoothAdapter          getBleEnabledArray(): ON
BluetoothGatt             onClientConnectionState() - status=0 clientIf=5 device=XX:XX:XX:XX:60:A0
McuMgrBleTransport        Connected to EB:3D:2C:D6:60:A0
BluetoothGatt             discoverServices() - device: XX:XX:XX:XX:60:A0
BluetoothGatt             onSearchComplete() = Device=XX:XX:XX:XX:60:A0 Status=0
McuMgrBleTransport        Services discovered
BluetoothGatt             configureMTU() - device: XX:XX:XX:XX:60:A0 mtu: 498
BluetoothGatt             onConfigureMTU() - Device=XX:XX:XX:XX:60:A0 mtu=252 status=0
McuMgrBleTransport        MTU changed to: 252
BluetoothGatt             setCharacteristicNotification() - uuid: da2e7828-fbce-4e01-ae9e-261174997c48 enable: true
McuMgrBleTransport        Data written to descr. 00002902-0000-1000-8000-00805f9b34fb
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Notification received from da2e7828-fbce-4e01-ae9e-261174997c48, value: (0x) 01-00-00-06-00-00-FF-06-BF-62-72-63-08-FF
McuMgrBleTransport        Wait for value changed complete
McuMgrBleTransport        Received Header (Version: 0, Op: 1, Flags: 0, Len: 6, Group: 0, Seq: 255, Command: 6) CBOR {"rc":8}
BluetoothGatt             onPhyRead() - status=0 address=XX:XX:XX:XX:60:A0 txPhy=1 rxPhy=1
McuMgrBleTransport        PHY read (TX: LE 1M, RX: LE 1M)
McuMgrBleTransport        Sending (248 bytes) Header (Version: 1, Op: 2, Flags: 0, Len: 240, Group: 1, Seq: 0, Command: 1) CBOR {"data":"PbjzlgAAAAAAAgAAXFADAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////","len":218028,"sha":"2xpbY1ZHpNFAuX1m7jidoDKGaWDtiKgTfT7gkEqF500=","off":0}
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 1, Command: 6) CBOR {}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Sending (19 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 11, Group: 0, Seq: 2, Command: 7) CBOR {"format":"sv"}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
McuMgrBleTransport        Sending (9 bytes) Header (Version: 1, Op: 0, Flags: 0, Len: 1, Group: 0, Seq: 3, Command: 8) CBOR {}
McuMgrBleTransport        Data written to da2e7828-fbce-4e01-ae9e-261174997c48
BluetoothGatt             onClientConnectionState() - status=8 clientIf=5 device=XX:XX:XX:XX:60:A0
McuMgrBleTransport        Error: (0x8): GATT CONN TIMEOUT

Anyone got any ideas here?

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