Exception on device.discoverServices()

[vovagorodok]

Exception when trying await device.discoverServices() at https://github.com/vovagorodok/ble_backends/blob/main/packages/flutter_web_bluetooth_backend/lib/flutter_web_bluetooth_connector.dart#L48

DartError: SecurityError Tried getting blocklisted UUID (getPrimaryServices). https://goo.gl/HxfxSQ
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 274:3        throw_
package:flutter_web_bluetooth/src/bluetooth_device.dart 423:9                      <fn>
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 623:19                <fn>
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 648:23                <fn>
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 598:5                 <fn>
dart-sdk/lib/async/zone.dart 1854:54                                               runBinary
dart-sdk/lib/async/future_impl.dart 237:22                                         handleError
dart-sdk/lib/async/future_impl.dart 960:46                                         handleError
dart-sdk/lib/async/future_impl.dart 981:13                                         _propagateToListeners
dart-sdk/lib/async/future_impl.dart 738:5                                          [_completeErrorObject]
dart-sdk/lib/async/future_impl.dart 742:5                                          [_completeError]
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 511:7                 completeError
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 582:12                _asyncRethrow
package:flutter_web_bluetooth/web/native_bluetooth_remote_gatt_server.dart 154:47  <fn>
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 623:19                <fn>
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 648:23                <fn>
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 598:5                 <fn>
dart-sdk/lib/async/zone.dart 1854:54                                               runBinary
dart-sdk/lib/async/future_impl.dart 237:22                                         handleError
dart-sdk/lib/async/future_impl.dart 960:46                                         handleError
dart-sdk/lib/async/future_impl.dart 981:13                                         _propagateToListeners
dart-sdk/lib/async/future_impl.dart 738:5                                          [_completeErrorObject]
dart-sdk/lib/async/future_impl.dart 832:7                                          <fn>
dart-sdk/lib/async/schedule_microtask.dart 40:34                                   _microtaskLoop
dart-sdk/lib/async/schedule_microtask.dart 49:5                                    _startMicrotaskLoop
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 118:77   tear
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 188:69                <fn>

Starting by

flutter run -d chrome --debug --web-browser-flag "--enable-experimental-web-platform-features"

Peripheral

Same issue with both:

• ESP32 dev board with https://github.com/vovagorodok/ArduinoBleOTA software
• Arduino Nano 33 IoT board

Hardware Information:

• Hardware Model: Lenovo ThinkPad T14 Gen 5
• Memory: 48.0 GiB
• Processor: Intel® Core™ Ultra 5 135U × 14
• Graphics: Intel® Graphics (MTL)
• Disk Capacity: (null)

Software Information:

• Firmware Version: N47ET26W (1.15 )
• OS Name: Fedora Linux 42 (Workstation Edition)
• OS Build: (null)
• OS Type: 64-bit
• GNOME Version: 48
• Windowing System: Wayland
• Kernel Version: Linux 6.16.9-200.fc42.x86_64

[jeroen1602]

It looks like you may be trying to use a service that is on a browser block list and thus not allowed.

check here for the current list.

The list mostly stops websites from locating users or updating firmware.

[vovagorodok]

Do you mean this list https://github.com/WebBluetoothCG/registries/blob/master/gatt_blocklist.txt ?

[jeroen1602]

Yes that is the one. It seems something went wrong with pasting my original message

[vovagorodok]

Hmm, strange.

Checked on devices:

• ESP32 dev board
• Arduino Nano 33 IoT board

Checked with services:

• ArduinoBleOTA
• ArduinoBleChess
• even without any services

Checked with BLE libraries:

• NimBLE-Arduino
• ArduinoBLE
• Native ESP32 ble

Issue exist with all combinations.
Not sure what can be blacklisted here.
Maybe it is issue of combination: flutter_web_bluetooth + Chrome + Fedora Linux
I wonder where to go next with this. Create Chrome issue?

[jeroen1602]

You could try to remove services from your list of optional services until the discoverServices does work.

If it really is a bug in chromium then you should check here if is also broken on their own example site. (If it does work there then it is probably a bug in flutter_web_bluetooth)

As well as here for the actual implementation of the blocklist that may differ from the txt document hosted on GitHub.

[vovagorodok]

As well as here for the actual implementation of the blocklist that may differ from the txt document hosted on GitHub.

There no my services in this list

If it really is a bug in chromium then you should check here if is also broken on their own example site. (If it does work there then it is probably a bug in flutter_web_bluetooth)

Same issue when field for Service UUID is empty

But works correctly when specific service UUID is provided

Browser issue? Or my understanding?