ElinkThings_miniAppSDKDemo/ailink_demo/pages/index/index.js

const util = require("../../utils/util");

const plugin = requirePlugin("sdkPlugin").AiLink;


function inArray(arr, key, val) {
  for (let i = 0; i < arr.length; i++) {
    if (arr[i][key] === val) {
      return i;
    }
  }
  return -1;
}

// ArrayBuffer转16进度字符串示例
function ab2hex(buffer, split = ',') {
  var hexArr = Array.prototype.map.call(
    new Uint8Array(buffer),
    function (bit) {
      return ('00' + bit.toString(16)).slice(-2)
    }
  )
  return hexArr.join(split);
}

Page({
  data: {
    showWriteInput: false,
    devices: [
      // {
      //   deviceId: "02:03:04:05:06:07",
      //   name: "elink",
      //   localName: "elink",
      //   mac: "02:03:04:05:06:07",
      //   RSSI: -69,
      //   advertisServiceUUIDs:[
      //     "FFE0","FFC0"
      //   ],
      //   analyzeDataText:"0102003241123413"
      // }
    ],
    connected: false,
    chs: [],
  },
  onLoad: function () {

  },

  // 初始化蓝牙模块
  openBluetoothAdapter() {
    wx.openBluetoothAdapter({
      success: (res) => {
        console.log('openBluetoothAdapter success', res)
        this.startBluetoothDevicesDiscovery()
      },
      fail: (res) => {
        if (res.errCode === 10001) {
          wx.showToast({
            title: '请打开蓝牙',
            icon: "none"
          })
          wx.onBluetoothAdapterStateChange(function (res) {
            console.log('onBluetoothAdapterStateChange', res)
            if (res.available) {
              this.startBluetoothDevicesDiscovery()
            }
          })
        }
      }
    })
  },
  // 获取本机蓝牙适配器状态
  getBluetoothAdapterState() {
    wx.getBluetoothAdapterState({
      success: (res) => {
        console.log('getBluetoothAdapterState', res)
        if (res.discovering) {
          this.onBluetoothDeviceFound()
        } else if (res.available) {
          this.startBluetoothDevicesDiscovery()
        }
      }
    })
  },
  // 开始搜寻附近的蓝牙外围设备
  startBluetoothDevicesDiscovery() {
    if (this._discoveryStarted) {
      return
    }
    this._discoveryStarted = true
    wx.startBluetoothDevicesDiscovery({
      allowDuplicatesKey: true,
      services: [
        "FFE0",
        "F0A0",
      ],
      success: (res) => {
        console.log('startBluetoothDevicesDiscovery success', res)
        this.onBluetoothDeviceFound()
      },
    })
  },
  // 停止搜寻附近的蓝牙外围设备
  stopBluetoothDevicesDiscovery() {
    wx.stopBluetoothDevicesDiscovery()
  },

  // 监听寻找到新设备的事件
  onBluetoothDeviceFound() {
    wx.onBluetoothDeviceFound((res) => {
      res.devices.forEach(device => {
        if (!device.name && !device.localName) {
          return
        }
        const foundDevices = this.data.devices
        const idx = inArray(foundDevices, 'deviceId', device.deviceId)
        const data = {}
        // console.log(device)
        // console.log(ab2hex(device.advertisData))
        // 此处判断是否BM30广播模块，如使用连接模块请删除此 if ，只保留 else 内容
        if (device.advertisServiceUUIDs[0].indexOf("F0A0") !== -1) {
          let parseDataRes = plugin.parseBroadcastData(device.advertisData)
          console.log(parseDataRes)
          if (parseDataRes.status == 1) {
            let analyzeData = plugin.analyzeBroadcastScaleData(parseDataRes)
            console.log(analyzeData)
            device.analyzeDataText = analyzeData.text
          }
        } else {
          let buff = device.advertisData.slice(-6)
          device.mac = new Uint8Array(buff) // 保存广播数据中的mac地址，这是由于iOS不直接返回mac地址
        }
        if (idx === -1) {
          data[`devices[${foundDevices.length}]`] = device
        } else {
          data[`devices[${idx}]`] = device
        }
        this.setData(data)
      })
    })
  },
  // 连接低功耗蓝牙设备
  createBLEConnection(e) {
    const ds = e.currentTarget.dataset
    const index = ds.index
    // 保存当前连接的设备，注意不能从wxml的dataset中直接返回该对象，因为ArrarBuffer类型的数据无法保留
    this._device = this.data.devices[index]
    console.log(this._device)
    const deviceId = ds.deviceId
    const name = ds.name
    this.mac = ds.mac
    wx.createBLEConnection({
      deviceId,
      success: (res) => {
        this.setData({
          connected: true,
          name,
          deviceId,
        })
        console.log("createBLEConnection:success")
        wx.stopBluetoothDevicesDiscovery()
        this.getBLEDeviceServices(deviceId)
      }
    })
    // 连接上设备就可以停止蓝牙搜索，减少功耗。
    this.stopBluetoothDevicesDiscovery()
  },

  // 断开与低功耗蓝牙设备的连接
  closeBLEConnection() {
    wx.closeBLEConnection({
      deviceId: this._deviceId
    })
    this.setData({
      connected: false,
      chs: [],
    })
  },

  // 获取蓝牙设备的 serviceId
  getBLEDeviceServices(deviceId) {
    wx.getBLEDeviceServices({
      deviceId,
      success: (res) => {
        for (let i = 0; i < res.services.length; i++) {
          if (res.services[i].isPrimary) {
            this.getBLEDeviceCharacteristics(deviceId, res.services[i].uuid)
            return
          }
        }
      }
    })
  },

  // 获取蓝牙设备某个服务中所有特征值(characteristic)
  getBLEDeviceCharacteristics(deviceId, serviceId) {
    this._deviceId = deviceId
    this._serviceId = serviceId
    this._device.serviceId = serviceId

    wx.getBLEDeviceCharacteristics({
      deviceId,
      serviceId,
      success: (res) => {
        console.log('getBLEDeviceCharacteristics success', res.characteristics)

        // 这部分功能在插件的 initPlugin 中已实现，如需用到其中的 uuid 也可取消注释
        // // let uuid1, uuid2, uuid3;
        // for (let i = 0; i < res.characteristics.length; i++) {
        //   let item = res.characteristics[i]
        //   if (item.uuid.indexOf('0000FFE1') != -1) {
        //     this.uuid1 = item.uuid  //下发数据
        //   } else if (item.uuid.indexOf('0000FFE2') != -1) {
        //     this.uuid2 = item.uuid  //监听数据
        //   } else if (item.uuid.indexOf('0000FFE3') != -1) {
        //     this.uuid3 = item.uuid  //写入设置
        //   }
        // }
        // // 打开监听
        // wx.notifyBLECharacteristicValueChange({
        //   deviceId,
        //   serviceId,
        //   characteristicId: this.uuid2,
        //   state: true,
        // })
        // wx.notifyBLECharacteristicValueChange({
        //   deviceId,
        //   serviceId,
        //   characteristicId: this.uuid3,
        //   state: true,
        // })

        // 初始化插件
        plugin.initPlugin(res.characteristics, this._device)

        wx.onBLECharacteristicValueChange((characteristic) => {
          // 解析特征值，返回解密后的数据
          let bleData = plugin.parseBleData(characteristic.value)
          if (bleData.status == 0) {
            console.log("握手成功")
          } else if (bleData.status == 1) {
            console.log(bleData)
            let payload = bleData.data //对应协议中的payload数据，可以自行解析该数据
            console.log(ab2hex(payload, ' '))
            console.log(ab2hex(bleData.completeData, ' '))

            // 以体脂秤数据解析为例
            let weight, adc;
            switch (payload[0]) {
              /*
               * 例如： A7 00 0E 05 01 00 01 F4 10 19 7A---------50.0kg
               * 其中 01 00 01 F4 10 为 payload
               * 具体指令请根据协议解析
               */
              case 0x01:
              case 0x02:
                let weightValue = (payload[1] << 16) | (payload[2] << 8) | payload[3]
                let decPoint = (payload[4] & 0xf0) >> 4
                let unit = payload[4] & 0x0f
                // console.log("体重数值：" + weightValue)
                // console.log("小数点：" + decPoint)
                // console.log("单位：" + unit)
                if (unit == 1) { // 单位为斤
                  weight = weightValue / 2
                } else {
                  // ... 其他单位
                }
                weight = weightValue / (decPoint * 10) // 除去小数点位数
                break;
              // ...
              /*
                * 例如： A7 00 0E 03 07 02 30 4A 7A---------阻抗测量成功，阻抗 560Ω
                * 其中 07 02 30 为 payload
                * 具体指令请根据协议解析
                */
              case 0x07:
                adc = (payload[1] << 8) | payload[2]
                break;
              case 0x0A:
                //测量完成
                let bodyData = plugin.getBodyData(1, 20, 170, weight, adc) // 体脂秤数据解析
                console.log("解析后的体脂数据: ", bodyData)
                console.log(util.getWeightDisplay(170, weight))
                break;
            }

            const idx = inArray(this.data.chs, 'uuid', characteristic.characteristicId)
            const data = {}
            if (idx === -1) {
              data[`chs[${this.data.chs.length}]`] = {
                uuid: characteristic.characteristicId,
                value: ab2hex(payload, ' ')
              }
            } else {
              data[`chs[${idx}]`] = {
                uuid: characteristic.characteristicId,
                value: ab2hex(payload, ' ')
              }
            }
            this.setData(data)
          } else {
            console.log(bleData)
          }
        })
      },
      fail(res) {
        console.error('getBLEDeviceCharacteristics', res)
      }
    })
  },
  writeBLECharacteristicValue(buffer, uuid, deviceId, serviceId) {
    // 向蓝牙设备发送一个二进制流数据
    wx.writeBLECharacteristicValue({
      deviceId,
      serviceId,
      characteristicId: uuid,
      value: buffer,
      success(res) {
        console.log('writeBLECharacteristicValue success', res)
        console.log(ab2hex(buffer))
      }
    })
  },
  closeBluetoothAdapter() {
    wx.closeBluetoothAdapter()
    this._discoveryStarted = false
  },
  // 打开指令输入框
  showWriteInputView() {
    this.setData({
      showWriteInput: true
    })
  },
  // 关闭指令输入框
  hideWriteInputView() {
    this.setData({
      showWriteInput: false
    })
  },
  // 指令输入
  writingCmd(e) {
    this._cmd = e.detail.value
  },
  // 指令下发
  submitCmd() {
    if (!this._cmd) {
      return
    }
    let arr = []
    if (this._cmd.indexOf(",") == -1) {
      arr = this._cmd.split(" ")
    } else {
      arr = this._cmd.split(",")
    }
    for (let i in arr) {
      arr[i] = parseInt(arr[i], 16)
    }
    // let arr = [
    //   0xA6,
    //   0x01,
    //   0x28,
    //   0x29,
    //   0x6A,
    //   //A6 01 28 29 6A
    // ]
    if (arr[0] == 0xA6) {
      let payload = arr.slice(2, -2)
      plugin.sendDataOfA6(payload)
    } else if (arr[0] == 0xA7) {
      let cid = [arr[1], arr[2]] // 001E
      let payload = arr.slice(4, -2)
      plugin.sendDataOfA7(payload)
      // this.writeBLECharacteristicValue(buff, this.uuid1, this._deviceId, this._serviceId)
    }
    return
  },
});