BluetoothDemo/pages/G01/index.js

const util = require("../../utils/util");
const {
	inArray,
	ab2hex
} = util
Page({
	data: {
		connected: false,
		height: "",
		devices: [],
		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,
			interval: 1000, //上报设备的间隔
			services: [
				"FFF0",
			],
			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.name.indexOf("WSD") !== -1) {
					let value = ab2hex(device.advertisData, "")
					let type = value.substring(22, 24)
					let num = value.substring(28, 29)
					let dw = value.substring(29, 30)
					let data = parseInt(value.substring(24, 28), 16)
					let unit = "cm"
					const foundDevices = this.data.devices
					const idx = inArray(foundDevices, 'deviceId', device.deviceId)
					const dataT = {}
					let buffer = device.advertisData.slice(3, 9)
					device.mac = new Uint8Array(buffer) // 保存广播数据中的mac地址，这是由于iOS不直接返回mac地址
					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 (dw == "1") {
						unit = "FT"
						data = data * 2.54
					}
					if (num == "1") {
						data = data / 10
					}
					if (num == "2") {
						data = data / 100
					}
					if (num == "3") {
						data = data / 1000
					}
					if (type == "01") {
						that.setData({
							height: data + unit
						})
						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: [],
					height: "",
				})
			}
		})
	},

	/**
	 * 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: [],
			height: "",
		})
	},
});