Javascript 如何使用react-native-ble plx发现服务UUID和特征UUID？ 问题:
我正在尝试连接到我的蓝牙设备，但是在连接并发现所有服务和特征后，我无法前进，因为返回的信息不足。我没有收到任何服务UUID或任何特征UUID 我需要做什么才能访问UUID，然后才能读取特征 我所尝试的： 调用Javascript 如何使用react-native-ble plx发现服务UUID和特征UUID？ 问题:,javascript,react-native,bluetooth-lowenergy,react-native-android,react-native-ble-plx,Javascript,React Native,Bluetooth Lowenergy,React Native Android,React Native Ble Plx,我正在尝试连接到我的蓝牙设备，但是在连接并发现所有服务和特征后，我无法前进，因为返回的信息不足。我没有收到任何服务UUID或任何特征UUID 我需要做什么才能访问UUID，然后才能读取特征 我所尝试的： 调用device.discoverAllServicesAndCharacteristics（）后我的设备返回： {u 40:0，{u 65:0，{u 55:null，{u 72:null} 当我登录设备时，我得到： 06-23 16:36:54.758 4397 4597 I ReactN
device.discoverAllServicesAndCharacteristics（）后我的设备返回：
{u 40:0，{u 65:0，{u 55:null，{u 72:null}
当我登录设备时，我得到：
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { isConnectable: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: rssi: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: serviceData: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: overflowServiceUUIDs: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: mtu: 23,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: localName: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: manufacturerData: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: txPowerLevel: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: id: '00:1E:C0:65:D7:DB',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: solicitedServiceUUIDs: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: name: 'RND7DB',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: serviceUUIDs: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: _manager:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _eventEmitter:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _subscriber:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _subscriptionsForType:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { appStateDidChange:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: [ { subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: emitter:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: isAvailable: true,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: _eventHandlers: { change: {}, memoryWarning: {} },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: currentState: 'active' },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: listener: [Function],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: context: undefined,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: eventType: 'appStateDidChange',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: key: 0 } ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: websocketMessage: [ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: websocketOpen: [ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: websocketClosed: [ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: websocketFailed: [ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: didUpdateDimensions:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: [ { subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: emitter:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: sharedSubscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: _currentSubscription: null },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: listener: [Function],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: context: undefined,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: eventType: 'didUpdateDimensions',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: key: 0 } ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: hardwareBackPress:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: [ { subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: emitter:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: sharedSubscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: _currentSubscription: null },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: listener: [Function],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: context: undefined,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: eventType: 'hardwareBackPress',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: key: 0 } ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: collectBugExtraData:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: [ { subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: emitter:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: sharedSubscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: _currentSubscription: null },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: listener: [Function: collectExtraData],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: context: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: eventType: 'collectBugExtraData',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: key: 0 } ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: collectRedBoxExtraData:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: [ { subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: emitter:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: sharedSubscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: _currentSubscription: null },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: listener: [Function: collectExtraData],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: context: null,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: eventType: 'collectRedBoxExtraData',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: key: 0 } ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: url:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: [ { subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: emitter: { _subscriber: [Circular] },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: listener: [Function],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: context: undefined,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: eventType: 'url',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: key: 0 },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: emitter: { _subscriber: [Circular] },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: listener: [Function],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: context: undefined,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: eventType: 'url',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: key: 1 } ],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: toggleElementInspector:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: [ { subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: emitter:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: sharedSubscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: _currentSubscription: null },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: listener: [Function],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: context: undefined,
06-23 16:36:54.758 4397 4597 I ReactNativeJS: eventType: 'toggleElementInspector',
06-23 16:36:54.758 4397 4597 I ReactNativeJS: key: 0 },
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: emitter:
06-23 16:36:54.758 4397 4597 I ReactNativeJS: { _subscriber: [Circular],
06-23 16:36:54.758 4397 4597 I ReactNativeJS: sharedSubscribe
在这一点上，我不知道该怎么做，因为我没有收到任何有价值的信息来进一步从特征中获取信息
根据，我需要UUID从我的设备读取
device.readCharacteristicForService(
serviceUUID: UUID,
characteristicUUID: UUID,
transactionId: ?TransactionId
): Promise<Characteristic>
以下是我如何使用它，希望能有所帮助
const { updateCharacteristic } = this.props
const connectedDevice = await manager.connectToDevice(device.id)
const services = await connectedDevice.discoverAllServicesAndCharacteristics()
const characteristic = await this.getServicesAndCharacteristics(services)
getServicesAndCharacteristics(device) {
return new Promise((resolve, reject) => {
device.services().then(services => {
const characteristics = []
services.forEach((service, i) => {
service.characteristics().then(c => {
characteristics.push(c)
if (i === services.length - 1) {
const temp = characteristics.reduce(
(acc, current) => {
return [...acc, ...current]
},
[]
)
const dialog = temp.find(
characteristic =>
characteristic.isWritableWithoutResponse
)
if (!dialog) {
reject('No writable characteristic')
}
resolve(dialog)
}
})
})
})
})
}
致以最诚挚的问候。这是我如何使用它的，希望能有所帮助
const { updateCharacteristic } = this.props
const connectedDevice = await manager.connectToDevice(device.id)
const services = await connectedDevice.discoverAllServicesAndCharacteristics()
const characteristic = await this.getServicesAndCharacteristics(services)
getServicesAndCharacteristics(device) {
return new Promise((resolve, reject) => {
device.services().then(services => {
const characteristics = []
services.forEach((service, i) => {
service.characteristics().then(c => {
characteristics.push(c)
if (i === services.length - 1) {
const temp = characteristics.reduce(
(acc, current) => {
return [...acc, ...current]
},
[]
)
const dialog = temp.find(
characteristic =>
characteristic.isWritableWithoutResponse
)
if (!dialog) {
reject('No writable characteristic')
}
resolve(dialog)
}
})
})
})
})
}
致以最良好的祝愿