连接蓝牙设备，需要使用微信的wxcreateBLEConnection接口，参数为蓝牙设备的deviceId（这个参数在搜索的设备信息里面可以直接拿到）。
2 在blejs里面新增connect、disconnect、getDevConStatus三个接口，用以统一管理设备连接和设备断开，因为在安卓平台上，重复去连接会导致设备没有办法断开连接。所以在blejs里面还维护了一个连接/正在连接的设备数组，方便统一管理设备。当调用connect的时候，会先去这个数组里面查找是否有该设备，如果有就不再去调用连接了。当调用disconnect或者设备被动断开，会把该设备从这个数组里面删除。
蓝牙读取数据问题。小程序蓝牙接收不完整是蓝牙读取数据问题导致的。微信小程序，简称小程序是一种不需要下载安装即可使用的应用，它实现了应用“触手可及”的梦想，用户扫一扫或搜一下即可打开应用。
//indexjs
//获取应用实例
const app = getApp()
const util = require('//utils/utiljs')
const bletool = require('//utils/bletooljs')
Page({
data: {
// lists: [{ 'order_no': '1111', 'car_no': '321', 'car_type': '尚好捷', 'order_date': '2018-01-02 08:00', 'order_money': '1600', 'order_time': '4' }],
car_no: '',
order_no: '',
lists: [],
bleList: [], //蓝牙设备数组
serviceId: '',//592B3370-3900-9A71-4535-35D4212D2837
serviceMac: '',//C9:9B:4C:E7:DE:10
service_psd: '',//855525B837253705595800000329
service_uuid: '',
deviceId:'',
characteristics:[] //特征值
},
onLoad: function (options) {
thisinitBle();
},
onReady: function () {
// 页面渲染完成
},
onShow: function () {
if (appglobalDatacar_nolength>0){
thisgetDeviceInfo();
}
},
onHide: function () {
// 页面隐藏
},
onUnload: function () {
// 页面关闭
appglobalDatacar_no=''
},
//蓝牙相关
//初始化蓝牙
initBle: function () {
var that = this;
wxonBluetoothAdapterStateChange(function (res) {
consolelog('adapterState changed, now is', res)
appglobalDatable_state = resavailable;
if (resavailable) {
thatinitBle();
} else {
utilshowToast('手机蓝牙已关闭');
appglobalDatable_isonnectting = false;
}
})
//打开蓝牙适配器
wxopenBluetoothAdapter({
success: function (res) {
consolelog('打开蓝牙适配器成功');
thatgetBluetoothAdapterState();
appglobalDatable_state = true;
thatonBluetoothDeviceFound();
},
fail: function (res) {
// fail
consolelog(res)
utilshowToast('请打开手机蓝牙');
},
complete: function (res) {
// complete
}
})
},
onBluetoothDeviceFound:function(){
var that = this;
//监听扫描
wxonBluetoothDeviceFound(function (res) {
// res电脑模拟器返回的为数组；手机返回的为蓝牙设备对象
consolelog('监听搜索新设备：', res);
thatupdateBleList([res])
})
},
getBluetoothAdapterState: function () {
var that = this;
wxgetBluetoothAdapterState({
success: function (res) {
var available = resavailable;
var discovering = resdiscovering;
if (!available) {
utilshowToast('蓝牙不可用');
} else {
if (!discovering) {
// thatstartBluetoothDevicesDiscovery();
}
}
}
})
},
startBluetoothDevicesDiscovery: function () {
var that = this;
var services = [];
servicespush(thisdataserviceId);
wxshowLoading({
title: '设备搜索中'
});
setTimeout(function () {
wxhideLoading();
if (appglobalDatadeviceIdlength==0){
utilshowModal('设备搜索失败，请重试');
}
}, 10000)
if(bletoolisIOS()){
wxstartBluetoothDevicesDiscovery({
services: services,
allowDuplicatesKey: true,
success: function (res) {
consolelog('ios搜索成功');
consolelog(res);
},
fail: function (err) {
consolelog(err);
}
});
}else{
wxstartBluetoothDevicesDiscovery({
// services: services,
allowDuplicatesKey: true,
success: function (res) {
consolelog('Android搜索成功');
consolelog(res);
},
fail: function (err) {
consolelog(err);
wxhideLoading();
thatstartBluetoothDevicesDiscovery();
// thatgetBluetoothAdapterState();
utilshowToast('搜索失败');
}
});
}
},
startConnectDevices: function (ltype, array) {
var that = this;
clearTimeout(thatgetConnectedTimer);
thatgetConnectedTimer = null;
wxstopBluetoothDevicesDiscovery({
success: function (res) {
// success
}
})
appglobalDatable_isonnectting = true;
consolelog('连接前：'+thatdeviceId);
wxcreateBLEConnection({
deviceId: thatdeviceId,
success: function (res) {
if (reserrCode == 0) {
consolelog('连接成功：');
thatgetService(thatdeviceId);
}
},
fail: function (err) {
consolelog('连接失败：', err);
wxhideLoading();
utilshowModal('设备连接失败，请重试');
// if (ltype == 'loop') {
// thatconnectDeviceIndex += 1;
// thatloopConnect(array);
// } else {
// thatstartBluetoothDevicesDiscovery();
// thatgetConnectedBluetoothDevices();
// }
appglobalDatable_isonnectting = false;
},
complete: function () {
}
});
},
getService: function (deviceId) {
var that = this;
// 监听蓝牙连接
wxonBLEConnectionStateChange(function (res) {
consolelog(res);
appglobalDatable_isonnectting = resconnected
if (!resconnected) {
utilshowToast('连接断开');
}
});
// 获取蓝牙设备service值
wxgetBLEDeviceServices({
deviceId: deviceId,
success: function (res) {
consolelog('获取蓝牙设备service值');
consolelog(res);
thatgetCharacter(deviceId, resservices);
}
})
},
getCharacter: function (deviceId, services) {
var that = this;
servicesforEach(function (value, index, array) {
if (valueisPrimary) {
thatsetData({
service_uuid: valueuuid,
deviceId: deviceId
})
appglobalDataservice_uuid= valueuuid;
appglobalDatadeviceId=deviceId;
}
});
//监听通知
wxonBLECharacteristicValueChange(function (res) {
// callback
consolelog('value change', res)
const hex = bletoolbuf2char(resvalue)
consolelog('返回的数据：', hex)
//配对密码
if (hexindexOf('855800000106') != -1) {
wxhideLoading();
var charact_write = thatdatacharacteristics[1]
bletoolwriteDataToDevice(thatdatadeviceId, thatdataservice_uuid, charact_write, thatdataservice_psd);
wxshowToast({
title: '设备已连接',
icon: 'success',
duration: 3000
})
setTimeout(function () {
bletoolwriteDataToDevice(thatdatadeviceId, thatdataservice_uuid, charact_write, '235525B837253705590400000273');
}, 2000)
} else if (hexindexOf('23040000') != -1) {
//启动成功
thatstarRenting();
}
})
wxgetBLEDeviceCharacteristics({
deviceId: deviceId,
serviceId: thatgetServiceUUID(),
success: function (res) {
wxgetBLEDeviceCharacteristics({
deviceId: deviceId,
serviceId: thatgetServiceUUID(),
success: function (res) {
consolelog('特征', res)
thatsetData({
characteristics:rescharacteristics
})
appglobalDatacharacteristics = rescharacteristics;
var charact_read = rescharacteristics[0]
},
loopConnect: function (devicesId) {
var that = this;
var listLen = devicesIdlength;
if (devicesId[thisconnectDeviceIndex]) {
thisdeviceId = devicesId[thisconnectDeviceIndex];
thisstartConnectDevices('loop', devicesId);
} else {
consolelog('已配对的设备小程序蓝牙连接失败');
thatstartBluetoothDevicesDiscovery();
thatgetConnectedBluetoothDevices();
}
},
//更新数据 devices为数组类型
updateBleList: function (devices) {
consolelog('设备数据：',devices);
var newData = thisdatableList
var that = this
var tempDevice = null;
for (var i = 0; i < deviceslength; i++) {
//ios设备
if (devices[i]devices != null) {
if (devices[i]deviceslength > 0) {
tempDevice = devices[i]devices[0];
}
else {
continue
}
}
//安卓
else {
tempDevice = devices[i];
}
if (!thisisExist(tempDevice)) {
newDatapush(tempDevice)
}
}
consolelog('数据：');
consolelog(newData)
thissetData({
bleList: newData
})
if (!appglobalDatable_isonnectting) {
var that = this;
thisdatableListforEach(function (value, index, array) {
//找到对应id的设备，ios判断服务id安卓判断mac地址
var deviceId = value['deviceId'];
if(bletoolisIOS()){
let advertisServiceUUID = value['advertisServiceUUIDs'][0];
if (advertisServiceUUID == thatdataserviceIdtoUpperCase()){
thatdeviceId = deviceId;
consolelog(thatdeviceId);
thatstartConnectDevices();
}
}else{
if (deviceId == thatdataserviceMac) {
thatdeviceId = deviceId;
consolelog(thatdeviceId);
thatstartConnectDevices();
}
}
});
}
},
//是否已存在 存在返回true 否则false
isExist: function (device) {
var tempData = thisdatableList
for (var i = 0; i < tempDatalength; i++) {
if (tempData[i]deviceId == devicedeviceId) {
return true
}
}
return false
},
//服务uuid
getServiceUUID: function () {
return bletoolstringTransition(thisdataservice_uuid);
},
getDeviceInfo: function () {
let car_no = appglobalDatacar_no;
var that = this;
wxrequest({
url: appglobalDataserverURL + 'c=car&a=getDeviceInfo&open_id=' + appglobalDataopen_id + '&car_no=' + car_no,
method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
header: { 'content-type': 'application/json' }, // 设置请求的 header
success: function (res) {
// success
var data = resdata;
consolelog(data);
if (dataresult == 1) {
appglobalDataserviceId = datadataservice_id;
appglobalDataserviceMac = datadataservice_mac,
appglobalDataservice_psd = '85' + datadataservice_psd + '5800000329';
thatsetData({
serviceId: datadataservice_id,
serviceMac: datadataservice_mac,
service_psd: '85' + datadataservice_psd+'5800000329',
})
appstartBluetoothDevicesDiscovery();
// thatonBLECharacteristicValueChange();
} else {
utilshowModal(datamsg);
}
},
fail: function () {
},
complete: function () {
// complete
}
});
},
})
搜索不到蓝牙 的一般原因及处理方法：一，一般都会认为 打开蓝牙之后，手机就能搜索到蓝牙，并且成功与之连接，其实这是错误的。若要手机搜索到蓝牙，蓝牙就必须进入一个特殊的状态：配对状态。二，具体操作步骤：1 、确认蓝牙处于关机状态：长按多功能键2-3秒 ，蓝 牙指示红灯快速闪烁3次左右， 即关闭蓝牙。2、蓝牙进入 配对状态：长按多功能键7-8秒，蓝牙进入配对状态 表现为指示灯红蓝两种颜色交替快 速 闪烁或者 是指示灯常亮。三，蓝牙成功进 入配对状态后，接下来进入手机的操作：1、打 开手机的蓝 牙功能，搜索蓝牙 的型号。2、手机与蓝牙连接，如果提示输入pin码，一般为0000或1234。3、配对成功。这时就 可以用蓝 牙接听、打电话了，如果蓝牙支持A2DP协议，还可以用来听音乐。
微信小程序绑定手环使用蓝牙。绑定需要使用蓝牙功能。微信是腾讯公司于2011年1月21日推出的一个为智能终端提供即时通讯服务的免费应用程序，由张小龙所带领的腾讯广州研发中心产品团队打造。
