微信小程序 蓝牙的实现实例代码

微信小程序 蓝牙的实现实例代码

微信小程序 蓝牙的实现实例代码

1.简述

蓝牙适配器接口是基础库版本 1.1.0 开始支持。

iOS 微信客户端 6.5.6 版本开始支持，android 客户端暂不支持

蓝牙总共增加了18个api接口。

2.Api分类

搜索类

连接类

通信类

3.API的具体使用

详细见官网：

https://mp.weixin.qq.com/debug/wxadoc/dev/api/bluetooth.html#wxgetconnectedbluethoothdevicesobject

4. 案例实现

4.1 搜索蓝牙设备

/**

* 搜索设备界面

*/

Page({

data: {

logs: [],

list:[],

},

onLoad: function () {

console.log('onLoad')

var that = this;

// const SDKVersion = wx.getSystemInfoSync().SDKVersion || '1.0.0'

// const [MAJOR, MINOR, PATCH] = SDKVersion.split('.').map(Number)

// console.log(SDKVersion);

// console.log(MAJOR);

// console.log(MINOR);

// console.log(PATCH);

// const canIUse = apiName => {

// if (apiName === 'showModal.cancel') {

// return MAJOR >= 1 && MINOR >= 1

// }

// return true

// }

// wx.showModal({

// success: function(res) {

// if (canIUse('showModal.cancel')) {

// console.log(res.cancel)

// }

// }

// })

//获取适配器

wx.openBluetoothAdapter({

success: function(res){

// success

console.log("-----success----------");

console.log(res);

//开始搜索

wx.startBluetoothDevicesDiscovery({

services: [],

success: function(res){

// success

console.log("-----startBluetoothDevicesDiscovery--success----------");

console.log(res);

},

fail: function(res) {

// fail

console.log(res);

},

complete: function(res) {

// complete

console.log(res);

}

})

},

fail: function(res) {

console.log("-----fail----------");

// fail

console.log(res);

},

complete: function(res) {

// complete

console.log("-----complete----------");

console.log(res);

}

})

wx.getBluetoothDevices({

success: function(res){

// success

//{devices: Array[11], errMsg: "getBluetoothDevices:ok"}

console.log("getBluetoothDevices");

console.log(res);

that.setData({

list:res.devices

});

console.log(that.data.list);

},

fail: function(res) {

// fail

},

complete: function(res) {

// complete

}

})

},

onShow:function(){

},

//点击事件处理

bindViewTap: function(e) {

console.log(e.currentTarget.dataset.title);

console.log(e.currentTarget.dataset.name);

console.log(e.currentTarget.dataset.advertisData);

var title = e.currentTarget.dataset.title;

var name = e.currentTarget.dataset.name;

wx.redirectTo({

url: '../conn/conn?deviceId='+title+'&name='+name,

success: function(res){

// success

},

fail: function(res) {

// fail

},

complete: function(res) {

// complete

}

})

},

})

4.2连接 获取数据

/**

* 连接设备。获取数据

*/

Page({

data: {

motto: 'Hello World',

userInfo: {},

deviceId: '',

name: '',

serviceId: '',

services: [],

cd20: '',

cd01: '',

cd02: '',

cd03: '',

cd04: '',

characteristics20: null,

characteristics01: null,

characteristics02: null,

characteristics03: null,

characJjFNVmxJzZteristics04: null,

result,

},

onLoad: function (opt) {

var that = this;

console.log("onLoad");

console.log('deviceId=' + opt.deviceId);

console.log('name=' + opt.name);

that.setData({ deviceId: opt.deviceId });

/**

* 监听设备的连接状态

*/

wx.onBLEConnectionStateChanged(function (res) {

console.log(`device ${res.deviceId} state has changed, connected: ${res.connected}`)

})

/**

* 连接设备

*/

wx.createBLEConnection({

deviceId: that.data.deviceId,

success: function (res) {

// success

console.log(res);

/**

* 连接成功，后开始获取设备的服务列表

*/

wx.getBLEDeviceServices({

// 这里的 deviceId 需要在上面的 getBluetoothDevices中获取

deviceId: that.data.deviceId,

success: function (res) {

console.log('device services:', res.services)

that.setData({ services: res.services });

console.log('device services:', that.data.services[1].uuid);

that.setData({ serviceId: that.data.services[1].uuid });

console.log('--------------------------------------');

console.log('device设备的id:', that.data.deviceId);

console.log('device设备的服务id:', that.data.serviceId);

/**

* 延迟3秒，根据服务获取特征

*/

setTimeout(function () {

wx.getBLEDeviceCharacteristics({

// 这里的 deviceId 需要在上面的 getBluetoothDevices

deviceId: that.data.deviceId,

// 这里的 serviceId 需要在上面的 getBLEDeviceServices 接口中获取

serviceId: that.data.serviceId,

success: function (res) {

console.log('000000000000' + that.data.serviceId);

console.log('device getBLEDeviceCharacteristics:', res.characteristics)

for (var i = 0; i < 5; i++) {

if (res.characteristics[i].uuid.indexOf("cd20") != -1) {

that.setData({

cd20: res.characteristics[i].uuid,

characteristics20: res.characteristics[i]

});

}

if (res.characteristics[i].uuid.indexOf("cd01") != -1) {

that.setData({

cd01: res.characteristics[i].uuid,

characteristics01: res.characteristics[i]

});

}

if (res.characteristics[i].uuid.indexOf("cd02") != -1) {

that.setData({

cd02: res.characteristics[i].uuid,

characteristics02: res.characteristics[i]

});

} if (res.characteristics[i].uuid.indexOf("cd03") != -1) {

that.setData({

cd03: res.characteristics[i].uuid,

characteristics03: res.characteristics[i]

});

}

JjFNVmxJzZ if (res.characteristics[i].uuid.indexOf("cd04") != -1) {

that.setData({

cd04: res.characteristics[i].uuid,

characteristics04: res.characteristics[i]

});

}

}

console.log('cd01= ' + that.data.cd01 + 'cd02= ' + that.data.cd02 + 'cd03= ' + that.data.cd03 + 'cd04= ' + that.data.cd04 + 'cd20= ' + that.data.cd20);

/**

* 回调获取 设备发过来的数据

*/

wx.onBLECharacteristicValueChange(function (characteristic) {

console.log('characteristic value comed:', characteristic.value)

//{value: ArrayBuffer, deviceId: "D8:00:D2:4F:24:17", serviceId: "ba11f08c-5f14-0b0d-1080-007cbe238851-0x600000460240", characteristicId: "0000cd04-0000-1000-8000-00805f9b34fb-0x60800069fb80"}

/**

* 监听cd04cd04中的结果

*/

if (characteristic.characteristicId.indexOf("cd01") != -1) {

const result = characteristic.value;

const hex = that.buf2hex(result);

console.log(hex);

}

if (characteristic.characteristicId.indexOf("cd04") != -1) {

const result = characteristic.value;

const hex = that.buf2hex(result);

console.log(hex);

that.setData({ result: hex });

}

})

/**

* 顺序开发设备特征notifiy

*/

wx.notifyBLECharacteristicValueChanged({

deviceId: that.data.deviceId,

serviceId: that.data.serviceId,

characteristicId: that.data.cd01,

state: true,

success: function (res) {

// success

console.log('notifyBLECharacteristicValueChanged success', res);

},

fail: function (res) {

// fail

},

complete: function (res) {

// complete

}

http://})

wx.notifyBLECharacteristicValueChanged({

deviceId: that.data.deviceId,

serviceId: that.data.serviceId,

characteristicId: that.data.cd02,

state: true,

success: function (res) {

// success

console.log('notifyBLECharacteristicValueChanged success', res);

},

fail: function (res) {

// fail

},

complete: function (res) {

// complete

}

})

wx.notifyBLECharacteristicValueChanged({

deviceId: that.data.deviceId,

serviceId: that.data.serviceId,

characteristicId: that.data.cd03,

state: true,

success: function (res) {

// success

console.log('notifyBLECharacteristicValueChanged success', res);

},

fail: function (res) {

// fail

},

complete: function (res) {

// complete

}

})

wx.notifyBLECharacteristicValueChanged({

// 启用 notify 功能

// 这里的 deviceId 需要在上面的 getBluetoothDevices 或 onBluetoothDeviceFound 接口中获取

deviceId: that.data.deviceId,

serviceId: that.data.serviceId,

characteristicId: that.data.cd04,

state: true,

success: function (res) {

console.log('notifyBLECharacteristicValueChanged success', res)

}

})

}, fail: function (res) {

console.log(res);

}

})

}

, 1500);

}

})

},

fail: function (res) {

// fail

},

complete: function (res) {

// complete

}

})

},

/**

* 发送 数据到设备中

*/

bindViewTap: function () {

var that = this;

var hex = 'AA5504B10000B5'

var typedArray = new Uint8Array(hex.match(/[\da-f]{2}/gi).map(function (h) {

return parseInt(h, 16)

}))

console.log(typedArray)

console.log([0xAA, 0x55, 0x04, 0xB1, 0x00, 0x00, 0xB5])

var buffer1 = typedArray.buffer

console.log(buffer1)

wx.writeBLECharacteristicValue({

deviceId: that.data.deviceId,

serviceId: that.data.serviceId,

characteristicId: that.data.cd20,

value: buffer1,

success: function (res) {

// success

console.log("success 指令发送成功");

console.log(res);

},

fail: function (res) {

// fail

console.log(res);

},

complete: function (res) {

// complete

}

})

},

/**

* ArrayBuffer 转换为 Hex

*/

buf2hex: function (buffer) { // buffer is an ArrayBuffer

return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join('');

}

})

5.效果展示

发送校验指令。获取结果

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