空余時間簡單寫了一個微信小程序ibeacon三點定位。
事先淘寶買了七八個ibeacon小設備，放置在辦公司角落。分別設置三個ibeacon的位置坐標點，根據每一個ibeacon到已經開啟藍牙的目標物距離，計算出目標物在當前區域內坐標位置。適用于區域內購物指示。當然，進入該區域事先要打開手機藍牙。
下面代碼：
var app = getApp() Page({ data: { motto: 'Hello World', openBLE:'打開藍牙設備', startBLEDiscovery:'初始化藍牙設備', startBLEDevices:'目標定位', reStartSearchBLE:'重置藍牙', startSearchBLE:'默認空', userInfo: {}, deviceId: '', searchFlag:true, deviceRSSI:'', deviceName:'', deviceId:[], advertisServiceUUIDs: [], advertisData:[], canvasPointX:'', canvasPointY:'', avatarUrl:'../index/bg-image.jpg', showPosition:'' }, //事件處理函數 bindViewTap: function() { wx.navigateTo({ url: '../logs/logs' }) }, onLoad: function () { var that = this //調用應用實例的方法獲取全局數據 //that.setData({ deviceId: opt.deviceId }) app.getUserInfo(function(userInfo){ //更新數據 that.setData({ userInfo:userInfo }) //判斷兼容性 if (wx.openBluetoothAdapter) { //打開藍牙適配器，如果沒有打開 showtoast wx.openBluetoothAdapter({ success: function(res){ // success //獲取本機的藍牙適配器狀態 wx.getBluetoothAdapterState({ success: function(res){ // success that.setData({ searchFlag:true }) }, fail: function(res) { // fail that.setData({ searchFlag:false }) }, complete: function(res) { // complete } }) }, fail: function(res) { // fail 本機是否已經打開藍牙設備 wx.showToast({title:'請打開本機藍牙設備，重新掃碼', duration:10000 }) }, complete: function(res) { // complete } }) } else { // 如果希望用戶在最新版本的客戶端上體驗您的小程序，可以這樣子提示 wx.showModal({ title: '提示', content: '當前微信版本過低，無法使用該功能，請升級到最新微信版本后重試。' }) } }) }, startBLEDevices: function(){ var that = this wx.startBluetoothDevicesDiscovery({ services: [], success: function(res){ //獲取本機藍牙設備狀態 // success that.setData({ showPosition:setInterval(that.devicesFunc,1000) }) }, fail: function(res) { // fail }, complete: function(res) { // complete } }) }, // startBLEDevices: function(){ // var that = this // that.setData({ // showPosition:setInterval(that.devicesFunc,1000) // }) // }, devicesFunc: function(){ var that = this wx.getBluetoothDevices({ success: function(res){ // console.log(res); var arrayRSSI = new Array(); var arraydeviceName = new Array(); var arraydeviceId = new Array(); // var arrayUUIDs = new Array(); var arrayadvertisData = new Array(); var pointADistance = ''; var pointBDistance = ''; var pointCDistance = ''; for(var i = 0; i<res.devices.length;i++){ //console.log(res.devices[i].name); if(res.devices[i].name.indexOf('craft')==0){ //console.log(res.devices[i]); arrayRSSI.push(res.devices[i].RSSI); arraydeviceName.push(res.devices[i].name); arraydeviceId[i]= res.devices[i].deviceId; arrayUUIDs[i]= res.devices[i].advertisServiceUUIDs[i]; arrayadvertisData[i]= res.devices[i].advertisData ; 調用計算rssi對應距離的函數 var iRssi = Math.abs(arrayRSSI[i]); var power = (iRssi-59)/(10*2.0); var mm = Math.pow(10, power); console.log(arraydeviceName[i]+"距離的位置是"+mm+"米"); 取01，02，03分別為，（2，0），（2，2），（0，2）固定坐標點，做定位 if(res.devices[i].name.indexOf('craft01')==0){ var pointARSSi = res.devices[i].RSSI ; var iRssi = Math.abs(pointARSSi); var power = (iRssi-55)/(10*2.0); var pointADistance = Math.pow(10, power); console.log("a"+pointADistance); console.log(pointARSSi); } if(res.devices[i].name.indexOf('craft02')==0){ var pointBRSSi = res.devices[i].RSSI; var iRssi = Math.abs(pointBRSSi); var power = (iRssi-55)/(10*2.0); var pointBDistance = Math.pow(10, power); console.log("b"+pointBDistance); console.log(pointBRSSi); } if(res.devices[i].name.indexOf('craft03')==0){ var pointCRSSi = res.devices[i].RSSI; var iRssi = Math.abs(pointCRSSi); var power = (iRssi-57)/(10*2.0); var pointCDistance = Math.pow(10, power); console.log("c"+pointCDistance); console.log(pointCRSSi); } } } // 從 arrayRSSI 取三個距離定位點最近的ibeacon參與定位 if(arrayRSSI.length > 3){ //根據arrayRSSI進行信號強弱排序.距離越遠rssi值越小 for(var i = 0 ; i < arrayRSSI.length ; i ++){ for(var j = i+1 ; j< arrayRSSI.length ; j++){ if(arrayRSSI[i]<arrayRSSI[j]){ var select = arrayRSSI[i]; arrayRSSI[i] = arrayRSSI[j]; arrayRSSI[j] = select; } } } //獲取最近的三個距離 for(var i = 0 ; i < 3; i++){ if(i==0){ var pointARSSi = res.devices[i].RSSI ; var iRssi = Math.abs(pointARSSi); var power = (iRssi-55)/(10*2.0); var pointADistance = Math.pow(10, power); console.log("a"+pointADistance); console.log(pointARSSi); } if(i==1){ var pointBRSSi = res.devices[i].RSSI; var iRssi = Math.abs(pointBRSSi); var power = (iRssi-55)/(10*2.0); var pointBDistance = Math.pow(10, power); console.log("b"+pointBDistance); console.log(pointBRSSi); } if(i==2){ var pointCRSSi = res.devices[i].RSSI; var iRssi = Math.abs(pointCRSSi); var power = (iRssi-57)/(10*2.0); var pointCDistance = Math.pow(10, power); console.log("c"+pointCDistance); console.log(pointCRSSi); } } } //獲取定位點的x和y if(!pointADistance==''&&!pointBDistance==''&&!pointCDistance==''){ var pointDX='';var pointDY = ''; var p = Math.pow(pointADistance,2)/10-Math.pow(pointBDistance,2)/10; pointDX = 2.5 - p; var m = Math.pow(pointADistance,2)/10-Math.pow(pointCDistance,2)/10; pointDY = 2.5 - m; console.log('目標所在位置X是'+pointDX); console.log('目標所在位置Y是'+pointDY); if(pointDX > 0 && pointDY > 0){ wx.showToast({title:'歡迎進入25樓craft', duration:4000 }); } that.setData({ canvasPointX:pointDX, canvasPointY:pointDY }) //創建畫布 //計算坐標點在規定canvas上的位置顯示 var context = wx.createCanvasContext(); context.setStrokeStyle("#00ff00"); //a,b,c,d,e,f a,b起始坐標，c半徑，d，e起始和終止角度 context.arc(that.data.canvasPointX*30,that.data.canvasPointY*30,5,0,2*Math.PI); context.fill(); wx.drawCanvas({ canvasId: 'firstCanvas', actions: context.getActions() // 獲取繪圖動作數組 }) wx.showModal({title:'X軸:'+pointDX+'Y軸:'+pointDY, duration:5000 }); //開始網絡請求 wx.request({ url: 'http://craftww.cn/weixinIbeacon/index.php', data: {}, method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT // header: {}, // 設置請求的 header success: function(res){ // success }, fail: function(res) { // fail }, complete: function(res) { // complete } }) }else{ wx.showToast({title:'正在搜索...', duration:1000 }) 開始網絡請求 wx.request({ url: 'http://craftww.cn/weixinIbeacon/index.php', data: {}, method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT // header: {}, // 設置請求的 header success: function(res){ // success }, fail: function(res) { // fail }, complete: function(res) { // complete } }) } }, fail: function(res) { // fail }, complete: function(res) { // complete } }) } , //動態顯示 createList: function(thisName){ var that = this that.setData({ array:[{deviceDistance:"1"},{deviceDistance:"1"},{deviceDistance:"1"},{deviceDistance:"1"},{deviceDistance:"1"}] }) }, reStartSearchBLE: function(){ var that = this //清除本地數據緩存 wx.stopBluetoothDevicesDiscovery({ success: function(res){ // success }, fail: function(res) { // fail }, complete: function(res) { // complete } }) wx.clearStorageSync(); clearInterval(that.data.showPosition); console.log(that.data.showPosition); // that.context.clearRect(0,0,canvas.width,canvas.height); //斷開藍牙 var that = this wx.closeBluetoothAdapter({ success: function(res){ // success console.log('重置成功'); //打開藍牙適配器，如果沒有打開 showtoast wx.openBluetoothAdapter({ success: function(res){ // success //獲取本機的藍牙適配器狀態 wx.getBluetoothAdapterState({ success: function(res){ // success }, fail: function(res) { // fail }, complete: function(res) { // complete } }) }, fail: function(res) { }, complete: function(res) { // complete } }) }, fail: function(res) { // fail }, complete: function(res) { // complete } }) } //zheli})以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
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