web_blue 0.2.0

A starting point for Dart libraries or applications.

Dart wrapper via dart:js for https://webbluetoothcg.github.io/web-bluetooth/

Features

• canUseBlue
• getAvailability
• subscribeAvailabilitychanged/unsubscribeAvailabilitychanged
• getDevices/requestDevice
• connect/disconnect
• getPrimaryService/getCharacteristic
• startNotifications/stopNotifications
• subscribeValueChanged/unsubscribeValueChanged
• readValue/writeValueWithResponse

Usage

canUseBlue

bool canUse = canUseBlue();
print('canUse $canUse');

getAvailability

https://developer.mozilla.org/en-US/docs/Web/API/Bluetooth/getAvailability

bool availability = await blue.getAvailability();
print('availability $availability');

subscribeAvailabilitychanged/unsubscribeAvailabilitychanged

https://developer.mozilla.org/en-US/docs/Web/API/Bluetooth/onavailabilitychanged

final EventListener _handleAvailabilitychanged = allowInterop((Event event) {}
...
blue.subscribeAvailabilitychanged(_handleAvailabilitychanged);
...
blue.unsubscribeAvailabilitychanged(_handleAvailabilitychanged);

getDevices/requestDevice

• https://developer.mozilla.org/en-US/docs/Web/API/Bluetooth/getDevices

List<BlueDevice> getDevices = await blue.getDevices();
_device = getDevices[0];

• https://developer.mozilla.org/en-US/docs/Web/API/Bluetooth/requestDevice

BlueDevice requestDevice = await blue.requestDevice(RequestOptions(
  optionalServices: [BlueUUID.getService(WOODEMI_SERV__COMMAND)],
  acceptAllDevices: true,
));
_device = requestDevice;

connect/disconnect

• https://developer.mozilla.org/en-US/docs/Web/API/BluetoothRemoteGATTServer/connect

_device?.gatt.connect().then((value) {
  print('device.gatt.connect success');
}).catchError((error) {
  print('device.gatt.connect $error');
});

• https://developer.mozilla.org/en-US/docs/Web/API/BluetoothRemoteGATTServer/disconnect

_device?.gatt.disconnect();

getPrimaryService/getCharacteristic

• https://developer.mozilla.org/en-US/docs/Web/API/BluetoothRemoteGATTServer/getPrimaryService

_service = await _device!.gatt.getPrimaryService(BlueUUID.getService(WOODEMI_SERV__COMMAND));

• https://developer.mozilla.org/en-US/docs/Web/API/BluetoothRemoteGATTService/getCharacteristic

_characteristic = await _service!.getCharacteristic(BlueUUID.getCharacteristic(WOODEMI_CHAR__COMMAND_REQUEST));

startNotifications/stopNotifications

• https://developer.mozilla.org/en-US/docs/Web/API/BluetoothRemoteGATTCharacteristic/startNotifications

await _characteristic!.startNotifications();

• https://developer.mozilla.org/en-US/docs/Web/API/BluetoothRemoteGATTCharacteristic/stopNotifications

await _characteristic!.stopNotifications();

subscribeValueChanged/unsubscribeValueChanged

• https://developer.mozilla.org/en-US/docs/Web/API/BluetoothRemoteGATTCharacteristic/characteristicvaluechanged

final EventListener _handleValueChanged = allowInterop((event) {}
...
_characteristic!.subscribeValueChanged(_handleValueChanged);
...
_characteristic!.unsubscribeValueChanged(_handleValueChanged);

readValue/writeValueWithResponse

• https://developer.mozilla.org/en-US/docs/Web/API/BluetoothRemoteGATTCharacteristic/readValue

var byteData = await _characteristic!.readValue();

• https://developer.mozilla.org/en-US/docs/Web/API/BluetoothRemoteGATTCharacteristic/writeValueWithResponse

_characteristic!.writeValueWithResponse(Uint8List.fromList([0x01, 0x0A, 0x00, 0x00, 0x00, 0x01]));

Additional information

Status in Chromium: https://chromestatus.com/feature/5264933985976320