Frequent GATT errors

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DFU Bootloader version (please complete the following information):

• SDK version: don’t know; the firmware was provided by a 3rd party.
• Bonding used: no
• Library version: 1.11.1

Device information (please complete the following information):

• Device: various (including Pixel 2, OnePlus 3)
• OS: various (including 9.0, 11.0)

Describe the bug Firmware updates frequently fail on some devices, when using library version 1.11.1.
DfuProgressListener.onError() is called with error=133, errorType=1, message="GATT ERROR"

This happens more frequently on some devices than on others. Note that this seems to be a new issue in library version 1.11.1; I have not been able to reproduce it with versions 1.11.0 or 1.10.4.

I ran multiple firmware updates one after the other on several devices to test: On a Pixel 2, the error happened 5/10 times. On a OnePlus 3, it happened 1/12 times. One a Samsung Galaxy S10 it happened 0/10 times.

Logs

In the log below, note the line:

Scanning for new address finished with: null

The address is only null when the error occurs.

18:21:32.134 I/DfuBaseService: DFU service created. Version: 1.11.1
18:21:32.153 I/DfuBaseService: Starting DFU service in foreground
18:21:32.160 W/DfuBaseService: getNotificationTarget() should not return null if the service is to be started as a foreground service
18:21:32.238 I/DfuBaseService: Connecting to the device...
18:21:32.239 D/BluetoothGatt: connect() - device: EC:5E:29:62:B5:E8, auto: false
18:21:32.239 D/BluetoothGatt: registerApp()
18:21:32.240 D/BluetoothGatt: registerApp() - UUID=cd0731c0-ae04-40cf-be2c-4f897b4cff57
18:21:32.242 D/BluetoothGatt: onClientRegistered() - status=0 clientIf=10
18:21:32.243 D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=10 device=EC:5E:29:62:B5:E8
18:21:32.243 I/DfuBaseService: Connected to GATT server
18:21:32.244 D/BluetoothGatt: discoverServices() - device: EC:5E:29:62:B5:E8
18:21:32.245 I/DfuBaseService: Attempting to start service discovery... succeed
18:21:32.249 D/BluetoothGatt: onSearchComplete() = Device=EC:5E:29:62:B5:E8 Status=0
18:21:32.249 I/DfuBaseService: Services discovered
18:21:32.252 I/DfuImpl: Buttonless service without bond sharing found -> SDK 13 or newer
18:21:33.257 I/DfuImpl: Enabling indications...
18:21:33.267 D/BluetoothGatt: setCharacteristicNotification() - uuid: 8ec90003-f315-4f60-9fb8-838830daea50 enable: true
18:21:34.263 D/BluetoothGatt: onConnectionUpdated() - Device=FA:E2:8E:ED:62:77 interval=18 latency=0 timeout=400 status=0
18:21:34.302 I/DfuImpl: Sending Enter Bootloader (Op Code = 1)
18:21:34.352 I/DfuImpl: Response received (Op Code = 1, Status = 1)
18:21:35.860 V/FA: Inactivity, disconnecting from the service
18:21:38.384 D/BluetoothGatt: onClientConnectionState() - status=8 clientIf=10 device=EC:5E:29:62:B5:E8
18:21:38.385 W/DfuBaseService: Target device disconnected with status: 8
18:21:38.386 D/BluetoothGatt: onClientConnectionState() - status=8 clientIf=11 device=EC:5E:29:62:B5:E8
18:21:38.389 W/focusmotion.tk: Accessing hidden method Landroid/bluetooth/BluetoothGatt;->refresh()Z (greylist, reflection, allowed)
18:21:38.389 D/BluetoothGatt: refresh() - device: EC:5E:29:62:B5:E8
18:21:38.391 D/BluetoothGatt: setCharacteristicNotification() - uuid: 1cac0003-656e-696c-4b5f-6e6572726157 enable: false
18:21:38.391 I/DfuBaseService: Refreshing result: true
18:21:38.391 I/DfuBaseService: Cleaning up...
18:21:38.395 D/BluetoothGatt: cancelOpen() - device: EC:5E:29:62:B5:E8
18:21:38.397 I/FM: FM INFO: io.focusmotion.ptsdk.Device$Companion: "Sensoria-C1-1D43" connected: false
18:21:38.400 D/BluetoothGatt: close()
18:21:38.400 D/BluetoothGatt: unregisterApp() - mClientIf=10
18:21:38.401 I/DfuImpl: Restarting to bootloader mode
18:21:38.402 I/FM: FM INFO: DeviceService: DeviceService: device 0: Sensoria-C1-1D43
18:21:38.407 I/FM: FM INFO: DeviceService:   storing serial DE35017C12E84212
18:21:38.411 D/BluetoothAdapter: isLeEnabled(): ON
18:21:38.411 I/FM: FM INFO: DeviceService: DeviceService: device 1: Sensoria-C1-A0A1
18:21:38.413 D/BluetoothLeScanner: onScannerRegistered() - status=0 scannerId=10 mScannerId=0
18:21:38.414 I/FM: FM INFO: DeviceService:   storing serial 3FE44A921EBC570C
18:21:38.417 I/DfuBaseService: Action received: android.bluetooth.device.action.ACL_DISCONNECTED
18:21:38.539 D/BluetoothGatt: cancelOpen() - device: EC:5E:29:62:B5:E8
18:21:38.541 D/BluetoothGatt: close()
18:21:38.541 D/BluetoothGatt: unregisterApp() - mClientIf=11
18:21:43.411 D/BluetoothAdapter: isLeEnabled(): ON
18:21:43.419 I/DfuImpl: Scanning for new address finished with: null
18:21:43.444 I/DfuBaseService: Starting DFU service in foreground
18:21:43.445 W/DfuBaseService: getNotificationTarget() should not return null if the service is to be started as a foreground service
18:21:45.465 I/DfuBaseService: Connecting to the device...
18:21:45.472 D/BluetoothGatt: connect() - device: EC:5E:29:62:B5:E8, auto: false
18:21:45.474 D/BluetoothGatt: registerApp()
18:21:45.477 D/BluetoothGatt: registerApp() - UUID=770bfdbf-ef2d-4c88-bb52-83059fa322bf
18:21:45.480 D/BluetoothGatt: onClientRegistered() - status=0 clientIf=11
18:22:15.488 D/BluetoothGatt: onClientConnectionState() - status=133 clientIf=11 device=EC:5E:29:62:B5:E8
18:22:15.489 E/DfuBaseService: Connection state change error: 133 newState: 0
18:22:15.490 I/DfuBaseService: Connection error after: 30025 ms
18:22:15.490 E/DfuBaseService: Device not reachable. Check if the device with address EC:5E:29:62:B5:E8 is in range, is advertising and is connectable
18:22:15.491 I/DfuBaseService: Attempt: 1
18:22:15.493 D/BluetoothGatt: refresh() - device: EC:5E:29:62:B5:E8
18:22:15.495 I/DfuBaseService: Refreshing result: true
18:22:15.495 I/DfuBaseService: Cleaning up...
18:22:15.497 D/BluetoothGatt: cancelOpen() - device: EC:5E:29:62:B5:E8
18:22:15.500 D/BluetoothGatt: close()
18:22:15.500 D/BluetoothGatt: unregisterApp() - mClientIf=11
18:22:15.502 I/DfuBaseService: Restarting the service
18:22:15.515 I/DfuBaseService: Starting DFU service in foreground
18:22:15.516 W/DfuBaseService: getNotificationTarget() should not return null if the service is to be started as a foreground service
18:22:17.531 I/DfuBaseService: Connecting to the device...
18:22:17.537 D/BluetoothGatt: connect() - device: EC:5E:29:62:B5:E8, auto: false
18:22:17.537 D/BluetoothGatt: registerApp()
18:22:17.541 D/BluetoothGatt: registerApp() - UUID=55fcb7bf-8046-4c28-8bc1-b9c1a6645d28
18:22:17.547 D/BluetoothGatt: onClientRegistered() - status=0 clientIf=10
18:22:47.552 D/BluetoothGatt: onClientConnectionState() - status=133 clientIf=10 device=EC:5E:29:62:B5:E8
18:22:47.553 E/DfuBaseService: Connection state change error: 133 newState: 0
18:22:47.554 I/DfuBaseService: Connection error after: 30023 ms
18:22:47.554 E/DfuBaseService: Device not reachable. Check if the device with address EC:5E:29:62:B5:E8 is in range, is advertising and is connectable
18:22:47.555 I/DfuBaseService: Attempt: 2
18:22:47.557 D/BluetoothGatt: refresh() - device: EC:5E:29:62:B5:E8
18:22:47.559 I/DfuBaseService: Refreshing result: true
18:22:47.559 I/DfuBaseService: Cleaning up...
18:22:47.561 D/BluetoothGatt: cancelOpen() - device: EC:5E:29:62:B5:E8
18:22:47.562 D/BluetoothGatt: close()
18:22:47.563 D/BluetoothGatt: unregisterApp() - mClientIf=10
18:22:47.563 I/DfuBaseService: Restarting the service
18:22:47.579 I/DfuBaseService: Starting DFU service in foreground
18:22:47.580 W/DfuBaseService: getNotificationTarget() should not return null if the service is to be started as a foreground service
18:22:49.598 I/DfuBaseService: Connecting to the device...
18:22:49.603 D/BluetoothGatt: connect() - device: EC:5E:29:62:B5:E8, auto: false
18:22:49.605 D/BluetoothGatt: registerApp()
18:22:49.608 D/BluetoothGatt: registerApp() - UUID=3cd80b94-97e9-4637-8f20-204c4d187d2e
18:22:49.616 D/BluetoothGatt: onClientRegistered() - status=0 clientIf=10
18:23:19.620 D/BluetoothGatt: onClientConnectionState() - status=133 clientIf=10 device=EC:5E:29:62:B5:E8
18:23:19.620 E/DfuBaseService: Connection state change error: 133 newState: 0
18:23:19.620 I/DfuBaseService: Connection error after: 30024 ms
18:23:19.621 E/DfuBaseService: Device not reachable. Check if the device with address EC:5E:29:62:B5:E8 is in range, is advertising and is connectable
18:23:19.621 I/DfuBaseService: Attempt: 3
18:23:19.623 D/BluetoothGatt: refresh() - device: EC:5E:29:62:B5:E8
18:23:19.623 I/DfuBaseService: Refreshing result: true
18:23:19.623 I/DfuBaseService: Cleaning up...
18:23:19.624 D/BluetoothGatt: cancelOpen() - device: EC:5E:29:62:B5:E8
18:23:19.625 D/BluetoothGatt: close()
18:23:19.625 D/BluetoothGatt: unregisterApp() - mClientIf=10
18:23:20.301 8831-8831/io.focusmotion.tkr I/DfuBaseService: DFU service destroyed

[QuentinFarizon]

I’ve rollbacked to 1.11.0 since mid-august and did not encounter any customer issue since. In particular it fixed the issue on a customer’s Oppo phone.

[QuentinFarizon]

It’s difficult to test because it’s happening only on specific devices (1% of our customers).