使用react-native-ble-plx庫進(jìn)行開發(fā)

安裝

yarn add react-native-ble-plx // 輔助數(shù)據(jù)發(fā)送接收buffer工具類 yarn add buffer react-native link react-native-ble-plx 復(fù)制代碼

android

修改build.gradle中的最低sdk版本為18

android {...defaultConfig {minSdkVersion 18... 復(fù)制代碼

添加權(quán)限

<uses-permission android:name="android.permission.BLUETOOTH"/> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/> <uses-permission-sdk-23 android:name="android.permission.ACCESS_COARSE_LOCATION"/><!-- Add this line if your application always requires BLE. More info can be found on:https://developer.android.com/guide/topics/connectivity/bluetooth-le.html#permissions--> <uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/> 復(fù)制代碼

使用

android權(quán)限申請(qǐng)

const permissions: Permission[] = ['android.permission.ACCESS_COARSE_LOCATION'];if (Platform.OS == "android") {for (const permission of permissions) {const check = await PermissionsAndroid.check(permission);console.log(`permission ${permission} check ${check}`);if (!check) {await PermissionsAndroid.request(permission);}} } 復(fù)制代碼

實(shí)例初始化

const bleManager = new BleManager(); 復(fù)制代碼

打開藍(lán)牙

const state = await this.bleManager.state(); if (state == State.PoweredOff) {if (Platform.OS == 'android') {const enable = await this.bleManager.enable();console.log(await this.bleManager.state());} else if (Platform.OS == 'ios') {// ios不能直接打開，用對(duì)話框提示打開藍(lán)牙} } 復(fù)制代碼

掃描設(shè)備

bleManager.startDeviceScan(null, null, async (error, device) => {if (error) return console.error(error);// 打印設(shè)備名稱console.log(device.name); }); 復(fù)制代碼

連接設(shè)備

uuid連接

bleManager.connectToDevice(id); 復(fù)制代碼

device連接

device.connect(); 復(fù)制代碼

獲取characteristic

const serviceDevice = await device.discoverAllServicesAndCharacteristics(); const services = await serviceDevice.services(); for (const service of services) {const serviceUUID = service.uuid;// 判斷service是否符合if (match) {const characteristics = await service.characteristics();for (const characteristic of characteristics) {const characteristicUUID = characteristic.uuid;// 判斷characteristic是否符合if (match) {// 獲取讀或者寫characteristic}}} } 復(fù)制代碼

數(shù)據(jù)發(fā)送

const array = [0x00, 0x01, ...]; const openValueBase64 = new Buffer(array).toString('base64'); await writeCharacteristic!.writeWithoutResponse(openValueBase64); 復(fù)制代碼

數(shù)據(jù)接收

// 監(jiān)聽 readCharacteristic.monitor((error, characteristic) => {if (error) return console.error(error);const value = characteristic!.value!;const buffer = Buffer.from(value, 'base64');// 打印讀取到的數(shù)據(jù)console.log('read', buffer); }); 復(fù)制代碼

總結(jié)

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