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();

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。