微信小程序使用蓝牙小插件

本文实例为大家分享了微信小程序使用蓝牙小插件,供大家参考,具体内容如下

bluetooth.js

function BLE(options) {

this.options = options || { locator: {} };

}

function ab2hex(buffer) {

const hexArr = Array.prototype.map.call(

new Uint8Array(buffer),

function (bit) {

return ('00' + bit.toString(16)).slice(-2)

}

)

return hexArr.join('-')

};

BLE.prototype = {

open: function (callback) {//打开适配器 成功 调用callback();

wx.openBluetoothAdapter({

success(res) {

if (typeof callback != "undefined") {

callback();

}

},

fail(res) {

console.log(res)

}

})

},

scan: function (callback) {//扫描设备 成功 调用callback(ls);

wx.startBluetoothDevicesDiscovery({

success(res) {

wx.getBluetoothDevices({

success(res) {

console.log(res);

var ls = [];

for (var i = 0; i < res.devices.length; i++) {

console.log(res.devices[i].name);

ls[i] = {

deviceId: res.devices[i].deviceId,

name: res.devices[i].name

};

}

if (typeof callback!= "undefined"){

callback(ls);

}

}

})

},

fail(res) {

console.log(res)

return 0;

}

})

},

link: function (deviceId, callback) {//连接设备 成功 调用callback();

wx.createBLEConnection({

// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接

deviceId: deviceId,

success(res) {

console.log(res);

wx.getBLEDeviceServices({

// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接

deviceId: deviceId,

success(res) {

console.log(res);

wx.getBLEDeviceCharacteristics({

// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接

deviceId: deviceId,

// 这里的 serviceId 需要在 getBLEDeviceServices 接口中获取

serviceId: ' ',

success(res) {

console.log(res)

if (typeof callback != "undefined") {

callback();

}

}

})

}

})

},

fail(res) {

console.log(res)

}

})

},

write: function (deviceId, value, callback) {//写入数据 成功 调用callback();

const buffer = new ArrayBuffer(value.length);

const dataView = new DataView(buffer);

for (var i = 0; i < value.length; i++) {

dataView.setUint8(i, value[i].charCodeAt());

}

console.log(buffer);

console.log(buffer);

wx.getBLEDeviceServices({

// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接

deviceId: deviceId,

success(res) {

console.log(res);

wx.getBLEDeviceCharacteristics({

// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接

deviceId: deviceId,

// 这里的 serviceId 需要在 getBLEDeviceServices 接口中获取

serviceId: '4FAFC201-1FB5-459E-8FCC-C5C9C331914B',

success(res) {

wx.writeBLECharacteristicValue({

deviceId: deviceId,

serviceId: '4FAFC201-1FB5-459E-8FCC-C5C9C331914B',

characteristicId: 'BEB5483E-36E1-4688-B7F5-EA07361B26B8',

value: buffer,

success: function (res) {

console.log(res);

if (typeof callback != "undefined") {

callback();

}

},

fail: function (res) {

console.log(res);

}

})

}

})

}

})

},

read: function (deviceId, callback) {//读取数据 成功 调用callback(xmlString);

wx.onBLECharacteristicValueChange(function (characteristic) {

var board = ab2hex(characteristic.value);

var bigData = board.split('-');

var result = [];

for (var i = 0; i < bigData.length; i++) {

result.push(String.fromCharCode('0X' + bigData[i]));

}

var xmlString = result.join('');

if (typeof callback != "undefined") {

callback(xmlString);

}

});

wx.readBLECharacteristicValue({

// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接

deviceId: deviceId,

// 这里的 serviceId 需要在 getBLEDeviceServices 接口中获取

serviceId: '4FAFC201-1FB5-459E-8FCC-C5C9C331914B',

// 这里的 characteristicId 需要在 getBLEDeviceCharacteristics 接口中获取

characteristicId: 'BEB5483E-36E1-4688-B7F5-EA07361B26B8',

success(res) {

// console.log('readBLECharacteristicValue:', res.errCode);

console.log(res);

},

fail(res) {

console.log(res);

}

})

},

close: function (deviceId, callback) {//关闭蓝牙 成功 调用callback();

wx.closeBLEConnection({

deviceId: deviceId,

success(res) {

console.log(res);

if (typeof callback != "undefined") {

callback();

}

}

})

// wx.closeBluetoothAdapter({

// success(res) {

// console.log(res);

// if (typeof callback != "undefined"){

// callback();

// }

// }

// })

}

}

exports.BLE = BLE;

index.js

const Ble = require('../../lib/bluetooch/bluetooch');

var ble = new Ble.BLE();

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