BluetoothDemo/bluetooth_demo_L01/pages/index/index.js

const util = require("../../utils/util");
const {
    inArray,
    ab2hex
} = util
const plugin = requirePlugin("sdkPlugin").AiLink;
Page({
    data: {
        devices: [],
        connected: false,
        weight: "",
        imp: "",
        deviceId: null,
    },
    onLoad: function() {},
    // 初始化蓝牙模块
    openBluetoothAdapter() {
        wx.openBluetoothAdapter({
            success: (res) => {
                console.log('openBluetoothAdapter success', res)
                wx.showToast({
                    title: '蓝牙连接中',
                    icon: "none"
                })
                this.startBluetoothDevicesDiscovery()
            },
            fail: (res) => {
                if (res.errCode === 10001) {
                    wx.showToast({
                        title: '请打开蓝牙',
                        icon: "none"
                    })
                    // 监听本机蓝牙状态变化的事件
                    wx.onBluetoothAdapterStateChange((res) => {
                        console.log('onBluetoothAdapterStateChange', res)
                        if (res.available) {
                            this.startBluetoothDevicesDiscovery()
                        }
                    })
                }
            }
        })
    },

    // 开始搜寻附近的蓝牙外围设备
    startBluetoothDevicesDiscovery() {
        if (this._discoveryStarted) {
            return
        }
        this._discoveryStarted = true
        wx.startBluetoothDevicesDiscovery({
            allowDuplicatesKey: true, //是否允许重复上报同一设备
            services: [ //要搜索蓝牙设备主 service 的 uuid 列表
                "F0A0",
            ],
            success: (res) => {
                console.log('startBluetoothDevicesDiscovery success', res)
                this.onBluetoothDeviceFound()
            },
        })
    },
    // 停止搜寻附近的蓝牙外围设备
    stopBluetoothDevicesDiscovery() {
        wx.stopBluetoothDevicesDiscovery()
    },

    // 找到新设备的事件
    onBluetoothDeviceFound() {
        let that = this
        wx.onBluetoothDeviceFound((res) => {
            res.devices.forEach(device => {
                if (!device.name && !device.localName) {
                    return
                }
                if (device.advertisServiceUUIDs[0].indexOf("F0A0") !== -1) {
                    let value = ab2hex(device.advertisData)
                    let parseDataRes = plugin.parseBroadcastData(device.advertisData)
                    let analyzeData = plugin.analyzeBroadcastScaleData(parseDataRes)
                    let analyzeDataText = analyzeData.text
                    let data = analyzeData.data
                    const dataT = {}
                    const foundDevices = this.data.devices
                    const idx = inArray(foundDevices, 'deviceId', device.deviceId)
                    let buffer = device.advertisData.slice(0, 8)
                    device.mac = new Uint8Array(buffer)
                    let tempMac = Array.from(device.mac)
                    tempMac.reverse()
                    device.macAddr = ab2hex(tempMac, ':').toUpperCase()

                    if (idx === -1) {
                        dataT[`devices[${foundDevices.length}]`] = device
                    } else {
                        dataT[`devices[${idx}]`] = device
                    }
                    this.setData(dataT)
                    if (parseDataRes.status == 1) {
                        let dw1 = "kg"
                        if (data.weightUnit == "1") {
                            dw1 = "斤"
                        }
                        if (data.weightUnit == "4") {
                            dw1 = "st:lb"
                            data = 1 * data + 5
                        }
                        if (data.weightUnit == "6") {
                            dw1 = "lb"
                        }
                        if (data.weightDecimal == "1") {
                            data.weight = data.weight / 10
                        }
                        if (data.weightDecimal == "2") {
                            data.weight = data.weight / 100
                        }
                        if (data.weightDecimal == "3") {
                            data.weight = data.weight / 1000
                        }
                        that.setData({
                            weight: analyzeData.text
                        })
                        return
                    }
                }
            })
        })
    },
    //监听蓝牙连接状态
    onBLEConnectionStateChange() {
        wx.onBLEConnectionStateChange((res) => {
            if (!res.connected) {
                wx.stopBluetoothDevicesDiscovery();
                setTimeout(() => {
                    wx.showToast({
                        title: '连接已断开',
                        icon: 'none'
                    })
                }, 500)
                this.setData({
                    connected: false,
                    devices: [],
                    weight: "",
                    imp: ""
                })
            }
        })
    },

    /**
     * 断开蓝牙模块
     */
    closeBluetoothAdapter() {
        wx.stopBluetoothDevicesDiscovery();
        wx.closeBluetoothAdapter()
        this._discoveryStarted = false
        wx.showToast({
            title: '结束流程',
            icon: 'none'
        })
        this.setData({
            devices: [],
            weight: "",
            imp: ""
        })
    },
});