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.hasPermission = false;
    that.publicDevice = null;
    that.connectWillDevice = null;
    that.callBackConnect = null;
    that.requestBlueTime = 0;
    ///正在执行扫描中
    that.isAvailable = false;
    that.doStartScaning = false;
    that.compareList = [];
    that.dissmissDevice = [];
  }

  ///获取比较的数据
  getCompareList() {
    return this.compareList;
  }

  setCompareList(compareList) {
    this.compareList = compareList;
  }

  getDissmissDevice() {
    return this.dissmissDevice;
  }

  setConnectWillDevice(connectWillDevice) {
    this.connectWillDevice = connectWillDevice;
  }

  getCallBackConnect() {
    return this.callBackConnect;
  }

  setCallBackConnect(callBackConnect) {
    this.callBackConnect = callBackConnect;
  }

  /// 监控蓝牙打开状态
  initBluetoothAdapter() {
    var that = this;
    wx.onBluetoothAdapterStateChange(function (res) {
      that.isAvailable = res.available;
      if (!that.isAvailable) {
        that.compareList = [];
        that.dissmissDevice = [];
        getCurrentPages()[0].closeBlueResetOffline(false, true);
      }
    });
  }

  ///监听搜索设备列表
  getBluetoothDevices() {
    var that = this;
    wx.onBluetoothDeviceFound(function (res) {
      ///第一种情况
      if (res.deviceId) {
        if (that.callBackConnect != null) {
          if (that.connectWillDevice != null && res.name == that.connectWillDevice.clientType) {
            res.mac = res.advertisData ? that.buf2hex(res.advertisData) : '';
            // if (that.callBackConnect != null) {
            console.log("1111", res.mac);
            if (that.callBackConnect != null) {
              that.callBackConnect(res);
            }
          }
        } else {
          if (res.name != "") {
            if (that.compareList.length > 0) {
              var has = false;
              for (var i = 0; i < that.compareList.length; i++) {
                if (res.deviceId == that.compareList[i].deviceId) {
                  has = true;
                  break;
                }
              }
              if (!has) {
                that.compareList.push(res);
              }
            } else {
              that.compareList.push(res);
            }
          }
        }
      }
      ///第二种情况
      else if (res.devices) {
        if (that.callBackConnect != null) {
          for (var i = 0; i < res.devices.length; i++) {
            var temp = res.devices[i];
            //            if (temp.name == "MW-SR1(4G_WIFI)") {
            //            }
            // if (temp.name != null) {
            //   console.log("2222", temp.name);
            // }
            if (that.connectWillDevice != null && temp.name == that.connectWillDevice.clientType) {
              temp.mac = temp.advertisData ? that.buf2hex(temp.advertisData) : '';
              temp.mac2 = that.ab2hex(temp.advertisData ?? "")
              // if (that.callBackConnect != null) {
              console.log("2222：", temp.mac, "：", temp.mac2, "：", temp.deviceId, temp);
              if (that.callBackConnect != null) {
                // if (that.callBackConnect != null && (temp.deviceId != "6E:66:C2:CA:74:F8" || temp.deviceId != "1A:B4:E0:40:22:8B")) {
                that.callBackConnect(temp);
              }
              break;
            }
          }
        } else {
          for (var i = 0; i < res.devices.length; i++) {
            if (res.devices[i].name != "") {

              if (that.compareList.length > 0) {
                var has = false;
                for (var j = 0; j < that.compareList.length; j++) {
                  if (res.devices[i].deviceId == that.compareList[j].deviceId) {
                    has = true;
                    break;
                  }
                }
                if (!has) {
                  that.compareList.push(res.devices[i]);
                }
              } else {
                that.compareList.push(res.devices[i]);
              }
            }
          }
        }
      }
      ///第三种情况
      else if (res[0]) {
        if (that.callBackConnect != null) {
          if (that.connectWillDevice != null && res[0].name == that.connectWillDevice.clientType) {
            res[0].mac = res[0].advertisData ? that.buf2hex(res[0].advertisData) : '';
            // if (that.callBackConnect != null) {
            console.log("3333", res.mac);

            if (that.callBackConnect != null) {

              that.callBackConnect(res[0]);
            }
          }
        } else {
          if (res[0].name != "") {
            if (that.compareList.length > 0) {
              var has = false;
              for (var i = 0; i < that.compareList.length; i++) {
                if (res[0].deviceId == that.compareList[i].deviceId) {
                  has = true;
                  break;
                }
              }
              if (!has) {
                that.compareList.push(res[0]);
              }
            } else {
              that.compareList.push(res[0]);
            }
          }
        }
      }
    });
  }
  onBLEConnectionStateChange(callback) {
    ///监听已连接或没有连接 连接和断开的时候会回调
    // {"deviceId":"E4:9F:80:09:40:EC","connected":false}
    let that = this;
    wx.onBLEConnectionStateChange((result) => {
      if (result.connected) {
        for (var i = 0; i < that.dissmissDevice.length; i++) {
          if (result.deviceId == that.dissmissDevice[i].deviceId) {
            that.dissmissDevice.splice(i, 1);
            break;
          }
        }
      } else {
        var has = false;
        for (var i = 0; i < that.dissmissDevice.length; i++) {
          if (result.deviceId == that.dissmissDevice[i].deviceId) {
            has = true;
            break;
          }
        }
        if (!has) {
          that.dissmissDevice.push(result);
        }

      }
      // that.disconnect(result)
      //断开连接是失败的， 只能监听到下线。
      if (callback != null) {
        callback(result);
      }

      // ///是否已配对
      // wx.isBluetoothDevicePaired({
      //   deviceId: result.deviceId,
      //   ///{"isPaired":false,"errno":0,"errMsg":"isBluetoothDevicePaired:ok"}
      //   success: (res) => {
      //   },
      //   fail: (err) => {
      //   }
      // })
    });
  }

  ///获取 所有搜索到的蓝牙设备
  getConnectedDevices() {
    var that = this;
    wx.getBluetoothDevices({
      success: (res) => {
        if (that.callBackConnect != null) {
          for (var i = 0; i < res.devices.length; i++) {
            var temp = res.devices[i];
            if (that.connectWillDevice != null && temp.name == that.connectWillDevice.clientType) {
              temp.mac = temp.advertisData ? that.buf2hex(temp.advertisData) : '';
              if (temp.mac) {
                console.log("搜索到的" + JSON.stringify(temp));
              }
              // if (that.callBackConnect != null) {
              if (that.callBackConnect != null) {
                // if (that.callBackConnect != null && temp.mac.includes("CF:CA")) {
                that.callBackConnect(temp);
              }
              break;
            }
          }
        } else {
          for (var i = 0; i < res.devices.length; i++) {
            if (that.compareList.length > 0) {
              var has = false;
              for (var j = 0; j < that.compareList.length; j++) {
                if (res.devices[i].name != "") {
                  //                  if (res.devices[i].name == "MW-SR1(4G_WIFI)") {
                  //                    console.log("gadsfqewrqewrqwerqrqr==000==" + JSON.stringify(res.devices[i]));
                  //                  }
                  if (res.devices[i].deviceId == that.compareList[j].deviceId) {
                    has = true;
                    break;
                  }
                }
              }
              if (!has) {
                that.compareList.push(res.devices[i]);
              }
            } else {
              that.compareList.push(res.devices[i]);
            }
          }
        }
      },
      fail: (err) => {
        console.error('获取蓝牙设备列表失败', err);
      }
    });
  }

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

  ///获取毫秒
  getCurrentMills() {
    var currentDate = new Date();
    var currentTimeMillis = currentDate.getTime();
    // return Math.floor(currentTimeMillis / 1000);
    return currentTimeMillis;
  }

  // 等待多少秒
  delay(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
  }

  // 开始搜索蓝牙设备
  async startScan(connectWillDevice, boolean, callBackConnect) {
    var that = this;

    ///限制搜索没有打开蓝牙一直询问打开蓝牙
    if (!that.isAvailable) {
      if (callBackConnect == null) {
        return;
      }

      ///做搜索蓝牙适配器权限
      const permission_util = require('../utils/permission_util');
      var available = await permission_util.openBluetoothAdapter();
      that.isAvailable = available;
      if (!available) {
        that.doStartScaning = false;
        that.requestBlueTime = that.getCurrentMills();
        if (boolean != null) {
          boolean(false);
        }
        return;
      }
    }

    const route_util = require('../utils/route_util');
    const route_constant = require('../utils/route_constant');
    const indexRoot = route_constant.indexRoot;
    const connectBleRoot = route_constant.connectBleRoot;
    var lastPageRoute = route_util.getLastPageRoute();
    if (lastPageRoute != indexRoot && lastPageRoute != connectBleRoot) {
      console.log("搜索蓝牙设备失败，请返回首页0");
      return;
    }

    ///蓝牙连接 做限制
    if (lastPageRoute == indexRoot) {
      if (that.doStartScaning == true) {
        console.log("搜索蓝牙设备失败，请返回首页1");
        return;
      }
    }

    that.doStartScaning = true;
    var currentMill = that.getCurrentMills();
    var waitMills = 0;
    var reduce = currentMill - that.requestBlueTime;
    const delayMiliis = 6 * 1000;
    if (reduce > 0 && reduce < delayMiliis) {
      waitMills = delayMiliis - reduce;
    }

    if (waitMills > 0) {
      await that.delay(waitMills);
    }

    if (callBackConnect == null && lastPageRoute == connectBleRoot) {
      that.doStartScaning = false;
      return;
    }

    wx.stopBluetoothDevicesDiscovery({
      success: (res) => {
        that.search(connectWillDevice, boolean, callBackConnect);
      },
      fail: (err) => {
        that.doStartScaning = false;
        that.requestBlueTime = that.getCurrentMills();
        if (boolean != null) {
          boolean(false);
        }
      }
    });
  }

  search(connectWillDevice, boolean, callBackConnect) {
    var that = this;
    wx.startBluetoothDevicesDiscovery({
      allowDuplicatesKey: true,
      success: function (res) {
        console.log("开始搜索设备", res);
        that.getConnectedDevices();

        that.doStartScaning = false;
        that.requestBlueTime = that.getCurrentMills();
        if (boolean != null) {
          boolean(true);
        }
        that.setConnectWillDevice(connectWillDevice);
        that.setCallBackConnect(callBackConnect);
        that.compareList = [];
      },
      fail(err) {
        console.log("开始搜索设备失败", res);

        that.doStartScaning = false;
        that.requestBlueTime = that.getCurrentMills();
        if (boolean != null) {
          boolean(false);
        }
      },
    })
  }

  // 停止搜索
  stopSearch() {
    var that = this;
    that.setCallBackConnect(null);
    that.setConnectWillDevice(null);
    return new Promise((resolve, reject) => {
      wx.stopBluetoothDevicesDiscovery({
        success: (res) => {
          resolve(res);
        },
        fail: (err) => {
          reject('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(mDevice) {
    var that = this;
    const strings = require('../utils/strings');
    let device = that.publicDevice;
    if (mDevice != null) {
      device = mDevice;
    }
    if (strings.isEmpty(device)) {
      return;
    }

    let deviceId = device.deviceId
    if (strings.isEmpty(deviceId)) {
      return;
    }
    console.log('开始断开连接', device);

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

  // 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);
        }
      });
    });
  }

  // 发送数据到指定设备
  async sendData(data, callback) {
    var that = this
    if (that.publicDevice == null) {
      console.log("没有连接设备");
      return;
    }
    return new Promise((resolve, reject) => {
      var buffer = null;
      // todo 判断是否是buffer
      // if (needChange) {
      //   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
      });
      // }
      let logData = new Uint8Array(buffer);
      console.log('开始发送数据:', logData);
      wx.writeBLECharacteristicValue({
        deviceId: that.publicDevice.deviceId,
        serviceId: that.publicDevice.serviceId,
        characteristicId: that.publicDevice.characteristicId,
        value: buffer,
        success: (res) => {
          if (callback) {
            callback(true)
          }
          resolve(true);
        },
        fail: (err) => {
          if (callback) {
            callback(false)
          }
          console.log('数据发送失败:', err);
          that.errorDisconnect()
          resolve(false);
        }
      });
    });
  }

  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;
  }

  // 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([]);
        }
      });
    });
  }

  connect() {}

  // 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;
  }
  errorDisconnect() {
    this.disconnect();
  }
}
// const ble = new bleManager();

// 导出 bleManager 类
module.exports = bleManager;