wxmini/devices/ble_manager.js

// 引入必要的微信小程序 API
// const wx = require('wx');
class bleManager {
  constructor() {
    var that = this;
    that.isAvailable = false;
    that.hasPermission = false;
    that.scanDevices = [];
    that.publicDevice = null;
  }

  /// 监控蓝牙打开状态
  initBluetoothAdapter() {
    var that = this;
    wx.onBluetoothAdapterStateChange(function (res) {
      that.isAvailable = res.available;
    })
  }

  ///监听搜索设备列表
  getBluetoothDevices(callBack) {
    var that = this;
    wx.onBluetoothDeviceFound(function (res) {
      ///第一种情况
      if (res.deviceId) {
        if (res.name == getApp().globalData.connectWillDevice.clientType) {
          res.advertisData = res.advertisData ? that.buf2hex(res.advertisData) : '';
          callBack(res);
        }
      }
      ///第二种情况
      else if (res.devices) {
        for (var i = 0; i < res.devices.length; i++) {
          var temp = res.devices[i];
          if (temp.name == getApp().globalData.connectWillDevice.clientType) {
            temp.advertisData = temp.advertisData ? that.buf2hex(temp.advertisData) : '';
            callBack(temp);
            break;
          }
        }
      }
      ///第三种情况
      else if (res[0]) {
        if (res[0].name == getApp().globalData.connectWillDevice.clientType) {
          res[0].advertisData = res[0].advertisData ? that.buf2hex(res[0].advertisData) : '';
          callBack(res[0]);
        }
      }
    });
  }

  ///获取数据
  buf2hex(buffer) {
    return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join('');
  }

  // 开始搜索蓝牙设备
  startScan(boolean) {
    wx.closeBluetoothAdapter({
      complete: function (res) {
        wx.openBluetoothAdapter({
          success: function (res) {
            wx.getBluetoothAdapterState({
              success: function (res) {},
              fail(err) {
                boolean(false);
              },
            })
            wx.startBluetoothDevicesDiscovery({
              allowDuplicatesKey: false,
              success: function (res) {
                boolean(true);
              },
              fail(err) {},
            })
          },
          fail: function (res) {
            wx.showModal({
              title: '提示',
              content: '请检查手机蓝牙是否打开',
              showCancel: false,
              success: function (res) {}
            });
            boolean(false);
          }
        })
      }
    })
  }

  // 停止搜索
  stopSearch() {
    return new Promise((resolve, reject) => {
      wx.stopBluetoothDevicesDiscovery({
        success: (res) => {
          console.log('停止搜索成功:', res);
          resolve(res);
        },
        fail: (err) => {
          console.error('停止搜索失败:', err);
          reject(new Error('停止搜索失败'));
        }
      });
    });
  }

  closeBle() {
    console.log('关闭蓝牙了')
    closeBluetoothAdapter();
  }

  // 断开与指定设备的连接
  disconnect() {
    var that = this;
    let device = that.publicDevice ?? {};
    let deviceId = device.deviceId ?? ""
    if (deviceId.length === 0) {
      return;
    }

    return new Promise((resolve, reject) => {
      wx.closeBLEConnection({
        deviceId: that.publicDevice.deviceId ?? "",
        success: (res) => {
          that.publicDevice = null;
          console.log('断开连接成功:', res);
          resolve(res);
        },
        fail: (err) => {
          console.error('断开连接失败:', err);
          reject(new Error('断开连接失败'));
        }
      });
    });
  }

  // 发送数据到指定设备
  async sendData(data) {
    var that = this
    return new Promise((resolve, reject) => {
      var buffer = null;
      // todo 判断是否是buffer
      // if (Buffer.isBuffer(data)) {
      //     buffer = data;
      // } else {
      buffer = new ArrayBuffer(data.length);
      // 下面是赋值，不能删
      const dataView = new DataView(buffer);
      data.forEach((value, index) => {
        dataView.setUint8(index, value); // 将每个16进制数值写入到 buffer 中
      });
      // }

      console.log('开始发送数据:', data, buffer);
      wx.writeBLECharacteristicValue({
        deviceId: that.publicDevice.deviceId,
        serviceId: that.publicDevice.serviceId,
        characteristicId: that.publicDevice.characteristicId,
        value: buffer,
        success: (res) => {
          // console.log('数据发送成功:');
          resolve(res);
        },
        fail: (err) => {
          console.error('数据发送失败:', err);
          reject(new Error('数据发送失败'));
        }
      });
    });
  }

  ab2hex(buffer) {
    var hexArr = Array.prototype.map.call(
      new Uint8Array(buffer),
      function (bit) {
        return ('00' + bit.toString(16)).slice(-2)
      }
    )
    return hexArr.join(':');
  }

  fiterDevice(res) {
    var that = this;
    var devices = res.devices.filter(device => {
      const name = device.name || '';
      const localName = device.localName || '';
      let isNot = that.isNotEmpty(name) || that.isNotEmpty(localName);
      if (isNot) {
        // console.log('是猫王设备名称:', device.advertisData, device.serviceData)
        let mac = that.ab2hex(device.advertisData)
        // console.log(mac)
        device.mac = mac
      }
      return isNot
    });

    let newDevices = devices.map((device) => {
      let uuid = device.advertisServiceUUIDs[0] ?? ""
      return {
        deviceId: device.deviceId,
        name: device.name,
        localName: device.localName,
        uuid: uuid,
        mac: device.mac,
        connectable: device.connectable
      }
    });
    return newDevices
  }

  isNotEmpty(name) {
    let isNot = (name !== '' &&
      (name.startsWith("MW_") ||
        name.startsWith("MW-") ||
        // name.startsWith("猫王") ||
        // name.startsWith("妙播") ||
        // name.startsWith("AirSmart") ||
        name === "le")
    )
    // if (!isNot && name !== '') {
    //     console.log('不是猫王设备名称:', name)
    // }
    return isNot;
  }
  // 连接到指定设备
  async connectToDevice(device) {
    var that = this;
    return new Promise((resolve, reject) => {
      console.log("开始连接蓝牙：", device.deviceId)
      wx.createBLEConnection({
        deviceId: device.deviceId,
        success: (res) => {
          that.publicDevice = device
          console.log('连接成功:', res);
          resolve(true);
        },
        fail: (err) => {
          that.publicDevice = null
          console.error('连接失败:', err);
          resolve(false);
        }
      });
    });
  }

  // 发现服务
  discoverServices(deviceId) {
    var that = this;
    console.log('发现服务:', deviceId);
    return new Promise((resolve, reject) => {
      wx.getBLEDeviceServices({
        deviceId: deviceId,
        success: (res) => {
          // that.publicDevice .services = res.services;
          let service_id = "";
          for (let i = 0; i < res.services.length; i++) {
            if (res.services[i].uuid.toUpperCase().indexOf("AB00") != -1 ||
              res.services[i].uuid.toUpperCase().indexOf("FFC0") != -1
              // res.services[i].uuid.toUpperCase().indexOf("ae800") != -1
            ) {
              service_id = res.services[i].uuid;
              break;
            }
            console.log('发现服务1:', service_id);
            service_id = res.services[i].uuid;

          }
          that.publicDevice.serviceId = service_id;
          console.log('发现服务2:', service_id);

          resolve(service_id);
          // resolve(res.services);
        },
        fail: (err) => {
          that.publicDevice.serviceId = null;

          console.error('发现服务失败:', err);
          reject([]);
        }
      });
    });
  }

  // 发现特征值 read / write
  discoverCharacteristics(deviceId, serviceId) {
    var that = this;
    console.log('发现特征值:' + deviceId + " ,  " + serviceId);
    // if (deviceId !== that.publicDevice .deviceId) {
    //     console.log('设备id不匹配')
    //     return false
    // }
    return new Promise((resolve, reject) => {
      wx.getBLEDeviceCharacteristics({
        deviceId: deviceId,
        serviceId: serviceId,
        success: (res) => {
          // that.characteristics[serviceId] = res.characteristics;
          console.log('发现特征值2:', res);
          // that.publicDevice .characteristics = res.characteristics;
          resolve(res.characteristics);
        },
        fail: (err) => {
          that.publicDevice.characteristics = null;
          console.error('发现特征值失败:', err);
          reject("");
        }
      });
    });
  }

  // 读取特征值
  readCharacteristicValue(characteristicId) {
    var that = ths;
    console.log('开始读取特征值', characteristicId)
    return new Promise((resolve, reject) => {
      wx.readBLECharacteristicValue({
        deviceId: that.publicDevice.deviceId,
        serviceId: that.publicDevice.serviceId,
        characteristicId: characteristicId,
        success: (res) => {
          const name = that.parseBLEValue(res.value); // 解析读取到的值
          console.log('读取特征值成功:', name, res);
          resolve(res);
        },
        fail: (err) => {
          console.error('读取特征值失败:', err);
          reject("");
        }
      });
    });
  }
  // 解析读取到的设备名称
  parseBLEValue(buffer) {
    return String.fromCharCode.apply(null, new Uint8Array(buffer));
  }

  // 监听特征值变化
  notifyCharacteristicValueChange(characteristicId, callback) {
    var that = this;
    console.log('监听特征值变化:', characteristicId, that.publicDevice.deviceId, that.publicDevice.serviceId);
    wx.notifyBLECharacteristicValueChange({
      deviceId: that.publicDevice.deviceId, //设备mac   IOS和安卓系统不一样
      serviceId: that.publicDevice.serviceId, //服务通道，这里主要是notify
      characteristicId: characteristicId, //notify uuid
      state: true,
      success: function (res) {
        console.log("开启notify 成功")
        //TODO  onBLECharacteristicValueChange  监听特征值 设备的数据在这里获取到
        wx.onBLECharacteristicValueChange(function (characteristic) {
          let buffer = characteristic.value
          let dataView = new DataView(buffer)
          let dataResult = []
          for (let i = 0; i < dataView.byteLength; i++) {
            // console.log("0x" + dataView.getUint8(i).toString(16))
            // dataResult.push("0x" + dataView.getUint8(i).toString(16))
            dataResult.push(dataView.getUint8(i))
          }
          const result = dataResult
          console.log("拿到的数据：", result)

          if (callback) {
            callback(result)
          }
        })
      },
      fail: function (res) {
        console.log("订阅特征失败：", res)
      }
    })
  }

  setWrite(wirte, characteristicId) {
    var that = this;
    console.log('写入特征值:', characteristicId)
    // that.publicDevice .wirte = wirte
    that.publicDevice.characteristicId = characteristicId;
  }
}
// const ble = new bleManager();

// 导出 bleManager 类
module.exports = bleManager;

// wx.getSetting({
//   success(res) {
//     if (res.authSetting["scope.userFuzzyLocation"]) {
//       // 成功
//       // that.getBluetoothStatus();
//       console.log("有定位权限")
//       resolve(true);
//     } else if (res.authSetting["scope.userFuzzyLocation"] === undefined) {
//       wx.authorize({
//         scope: "scope.userFuzzyLocation",
//         success() {
//           console.log("再次获取定位权限")
//           resolve(that.getSetting());
//         }
//       });
//     } else {
//       wx.showModal({
//         title: '请打开系统位置获取定位权限',
//         success(res) {
//           if (res.confirm) {
//             console.log('用户点击确定')
//             wx.openSetting({
//               complete() {
//                 // that.getSetting();
//                 // resolve(that.getSetting());
//               }
//             })
//           } else if (res.cancel) {
//             console.log('用户点击取消');
//           }
//         }
//       })
//       console.log("没有有定位权限")
//       reject(false);
//     }
//   }
// })

// // 获取已连接的蓝牙设备
// getConnectedDevices() {
//   var that = this;
//   if (!that.isAvailable && !that.hasPermission) {
//     return [];
//   }

//   return new Promise((resolve, reject) => {
//     wx.getConnectedBluetoothDevices({
//       // services: ["FFC0", "ffc0", "FFC1", "FFC2", "ffc1", "ffc2", "AB00", "ab00", "AB01", "AB02", "FFF1", "fff1", "FFE2", "FFE5",],
//       // services: ["ab00", "ffe5", "1111", "FFC0", "FFC1", "FFF1", ],
//       // services: [],
//       // services: [
//       //     "0000ab00-0000-1000-8000-00805f9b34fb",
//       //     "0000ffc0-0000-1000-8000-00805f9b34fb",
//       //     "0000FFF0-0000-1000-8000-00805F9B34FB",
//       //     "0000FFF1-0000-1000-8000-00805F9B34FB",
//       //     "0000FFE5-0000-1000-8000-00805F9B34FB",
//       // ],
//       success: (res) => {
//         console.log('已连接的蓝牙设备==11==:', newDevices);
//         let newDevices = that.fiterDevice(res)
//         console.log('已连接的蓝牙设备==22==:', newDevices);
//         resolve(newDevices);
//       },
//       fail: (err) => {
//         console.error('获取已连接的蓝牙设备失败:', err);
//         reject([]);
//       }
//     });
//   });
// }