MiniprogramParentWeb/miniprogram/pages/bluetooth/bluetooth.js

// 示例demo
const plugin = requirePlugin('ppScale-plugin')
var app = getApp();
Page({
  data: {
    deviceslist: [{
      name: "LFSmart Scale",

      deviceId: "CF:E6:16:22:82:28"
    }],

  },
  onHide() {
    
  },
  onLoad() {
    let that = this;
    //监听蓝牙打开状态
    wx.onBluetoothAdapterStateChange(function (res) {
      console.log('蓝牙适配器打开状态变化', res)
      // 如果蓝牙从关闭到打开并且 deviceslist 为空，则重新初始化蓝牙
      if (res.available && !that.data.deviceslist) {
        that.initBlue();
      }
    })
    //监听蓝牙连接状态
    wx.onBLEConnectionStateChange(function (res) {
      // 该方法回调中可以用于处理连接意外断开等异常情况
      console.log(`设备蓝牙连接状态`, res);
      // 如果蓝牙断开
      if (!res.connected) {
        // 关闭蓝牙连接事件，再重新初始化连接？
        // that.closeBlue();
        wx.showToast({
          title: '蓝牙已断开',
          icon: 'error'
        })
        /* setTimeout(() => {
          that.initBlue();
        }, 1500) */

      } else {
        wx.showToast({
          title: '蓝牙已连接',
          icon: 'success'
        })
      }
    })
  },
  onShow() {
    //  初始化蓝牙
    this.initBlue()
  },
  onUnload() {
    // 业务结束后需要停止蓝牙
    this.closeBlue();

  },
  closeBlue() {
    wx.closeBluetoothAdapter();
    wx.offBluetoothAdapterStateChange()
  },
  initBlue() {
    let that = this;
    /* that.setData({
      deviceslist: ''
    }) */
    console.log("初始化蓝牙");
    wx.openBluetoothAdapter({
      mode: 'peripheral',
      success: (res) => {
        console.log('openBluetoothAdapter', res)
        // 初始化成功后开始搜索周边蓝牙列表
        wx.showLoading({
          title: '搜索中',
        })
        wx.startBluetoothDevicesDiscovery({
          services: [], // 可指定服务UUID筛选要搜索的设备
          success: function (res) {
            if (res.errno === 0) {
              console.log('蓝牙设备搜索成功');

              setTimeout(() => {

                wx.getBluetoothDevices({
                  success: (resu) => {
                    console.log('getBluetoothDevices', resu)
                    // resu.device 为蓝牙列表
                    wx.hideLoading();
                    if (resu.devices.length > 0) {
                      wx.showToast({
                        title: '搜索成功',
                        icon: 'success'
                      })
                      that.setData({
                        deviceslist: resu.devices
                      });
                      // 此时再监听搜索到新设备的事件
                      wx.onBluetoothDeviceFound(function(res) {
                        var devices = res.devices;
                        console.log('找到一个新设备', devices)
                        that.data.deviceslist.push(devices[0]);
                          that.setData({
                            deviceslist: that.data.deviceslist
                          });
                      })
                      
                     
                    } else {

                      wx.showModal({
                        title: '温馨提示',
                        content: `暂无搜索到可用设备`,
                        showCancel: false,
                      })
                    }

                  }
                })
                // // 搜索到设备后停止搜索
                // wx.stopBluetoothDevicesDiscovery({
                //   success: () => {
                //     console.log("搜索到设备，停止搜索");
                //   }
                // });

              }, 1500)
            }

          },
          fail: function (err) {
            wx.hideLoading();
            wx.showModal({
              title: '温馨提示',
              content: `蓝牙设备搜索失败`,
              showCancel: false,
            })
            console.error('蓝牙设备搜索失败', err)
          }
        })
      },
      fail: (fail) => {
        wx.showModal({
          title: '温馨提示',
          content: `请打开蓝牙`,
          showCancel: false,
        })
      }
    });

  },
  // 选择设备
  selItem(res) {
    var that = this;
    var devItem = res.currentTarget.dataset.item;
    var device = this.data.deviceslist.find(item => item.deviceId === devItem.deviceId)
    app.globalData.selmac = device;
    that.data.selmac = device;
    that.setData({
      selmac: device
    })
    // 本地缓存连接的蓝牙设备信息
    console.log("this.globalData", app.globalData.selmac)

  },
  refresh: function (res) {
    this.initBlue();
    console.log("刷新", );
  },
  doback(res) {
    if (app.globalData.selmac) {
      // 进入详情前先停止搜索设备，
      wx.stopBluetoothDevicesDiscovery({
        success: () => {
          console.log("开始连接到设备，停止搜索");
        }
      });
      wx.navigateTo({
        url: '/pages/devicedetail/index'
      })
    } else if (this.data.deviceslist.length <= 0) {
      wx.showModal({
        title: '温馨提示',
        content: `搜索不到设备，请重试获取打开蓝牙`,
        showCancel: false,
      })
    } else {
      wx.showModal({
        title: '温馨提示',
        content: `请选择上面要连接的设备`,
        showCancel: false,
      })
      console.log('请选择设备')
    }
  },







})