starcloud-sdk-uniapp/uni/basic.js

import { Result } from '../constant'

/**
 * @typedef {Object} err
 * @property {number} errno - 错误代码
 * @property {number} errCode - 错误代码
 * @property {String} errMsg - 错误信息
 */

// 查找设备并连接
export function searchAndConnectDevice(name, reset = true) {
  // 循环查找设备
  let timer
  // 超时计时器
  let timeoutTimer

  return new Promise(async resolve => {
    const result = await startBluetoothDevicesDiscovery()
    if (result.code === Result.Success.code) {
      let searchFlag = false
      timeoutTimer = setTimeout(async () => {
        await stopBluetoothDevicesDiscovery()
        clearInterval(timer)
        if (!searchFlag) {
          resolve(Result.NotAvailableWeChatNearbyDevicesEmpty)
        } else {
          resolve(Result.Fail)
        }
      }, 10500)
      timer = setInterval(async () => {
        const queryResult = await getBluetoothDevices()
        if (queryResult.code === Result.Success.code) {
          const deviceList = queryResult.data
          if (searchFlag === false && deviceList.length > 0) {
            searchFlag = true
          }
          for (let i = 0; i < deviceList.length; i++) {
            if (deviceList[i]?.name === name) {
              const uuid = deviceList[i]?.advertisServiceUUIDs[0]
              if (uuid && uuid.slice(2, 8) === '758824') {
                await stopBluetoothDevicesDiscovery()
                clearTimeout(timeoutTimer)
                clearInterval(timer)
                if (uuid.slice(30, 32) === '00' && reset) {
                  resolve(Result.DeviceHasBeenReset)
                } else {
                  const connectResult = await createBLEConnection(deviceList[i].deviceId)
                  resolve(connectResult)
                }
                break
              }
              if (uuid && uuid.slice(0, 2) === '75') {
                await stopBluetoothDevicesDiscovery()
                clearTimeout(timeoutTimer)
                clearInterval(timer)
                if (uuid.slice(4, 6) === '00' && reset) {
                  resolve(Result.DeviceHasBeenReset)
                } else {
                  const connectResult = await createBLEConnection(deviceList[i].deviceId)
                  resolve(connectResult)
                }
                break
              }
            }
          }
        } else {
          resolve(queryResult)
        }
      }, 1000)
    } else {
      resolve(result)
    }
  })
}

// 蓝牙操作报错处理
async function handleError(err, event) {
  if (err.errCode === 10000) {
    const result = await openBluetoothAdapter()
    if (result.code === Result.Success.code) {
      return await event()
    }
    return result
  }
  if (err.errCode === 10001) {
    if (err.state === 3) {
      return Result.NotAvailableWeChatBluetoothPermission
    }
    return Result.NotAvailableBluetooth
  }
  if (err.errno === 3) {
    return Result.NotAvailableWeChatNearbyDevicesPermission
  }
  if (err.errno === 103) {
    return Result.NotAvailableBluetoothPermission
  }
  if (err.errno === 1509008) {
    return Result.NotAvailableWeChatLocationPermission
  }
  if (err.errMsg === 'openBluetoothAdapter:fail already opened') {
    return Result.Success
  }
  return Result.Fail
}

// 初始化蓝牙模块
function openBluetoothAdapter() {
  return new Promise(resolve => {
    uni.openBluetoothAdapter({
      success() {
        resolve(Result.Success)
      },
      async fail(err) {
        resolve(await handleError(err))
      }
    })
  })
}

// 关闭蓝牙模块
export function closeBluetoothAdapter() {
  uni.closeBluetoothAdapter()
}

// 移除蓝牙适配器的全部监听
export function offBluetoothAdapterStateChange() {
  uni.offBluetoothAdapterStateChange()
}

// 监听蓝牙特征值改变
export function onBLECharacteristicValueChange(callback) {
  uni.onBLECharacteristicValueChange(res => {
    callback(res)
  })
}

// 开始搜索附近的蓝牙设备
export function startBluetoothDevicesDiscovery() {
  return new Promise(resolve => {
    uni.startBluetoothDevicesDiscovery({
      success() {
        resolve(Result.Success)
      },
      async fail(err) {
        resolve(await handleError(err, startBluetoothDevicesDiscovery))
      }
    })
  })
}

// 获取所有已发现的蓝牙设备
export function getBluetoothDevices() {
  return new Promise(resolve => {
    uni.getBluetoothDevices({
      success(res) {
        resolve(new Result(Result.Success.code, res.devices))
      },
      async fail(err) {
        resolve(await handleError(err, getBluetoothDevices))
      }
    })
  })
}

// 停止搜索附近的蓝牙设备
export function stopBluetoothDevicesDiscovery() {
  return new Promise(resolve => {
    uni.stopBluetoothDevicesDiscovery({
      success() {
        resolve(Result.Success)
      },
      async fail(err) {
        resolve(await handleError(err))
      }
    })
  })
}

// 连接低功耗蓝牙设备
export function createBLEConnection(deviceId, reconnectNumber = 0) {
  return new Promise(resolve => {
    uni.createBLEConnection({
      deviceId,
      timeout: 10000,
      async success() {
        const res = await getBLEDeviceServicesAndCharacteristics(deviceId)
        await notifyBLECharacteristicValueChange(
          deviceId,
          res.data.serviceId,
          res.data.notifyCharacteristicId
        )
        // 使用同步方法获取系统信息
        const systemInfo = uni.getSystemInfoSync();

        if (systemInfo.platform === 'android') {
          // 如果是Android机型，则设置BLE MTU
          uni.setBLEMTU({
            deviceId: deviceId,
            mtu: 512,
            fail: res => {
              console.log('mtu fail', res);
            },
            success: res => {
              console.log('mtu success', res);
            }
          });
        } else {
          // 对于非Android设备，可以在这里添加其他逻辑或者直接忽略
          console.log('当前设备不是Android，跳过设置BLE MTU');
        }
        resolve(res)
      },
      async fail(err) {
        if (err.errno === 1509007) {
          const res = await getBLEDeviceServicesAndCharacteristics(deviceId)
          await notifyBLECharacteristicValueChange(
            deviceId,
            res.data.serviceId,
            res.data.notifyCharacteristicId
          )
          resolve(res)
        } else if (err.errno === 1509001 && reconnectNumber < 1) {
          resolve(Result.Fail)
        } else if (reconnectNumber < 1) {
          resolve(await createBLEConnection(deviceId, reconnectNumber + 1))
        } else {
          resolve(Result.Fail)
        }
      }
    })
  })
}

// 获取服务及对应特征值
async function getBLEDeviceServicesAndCharacteristics(deviceId) {
  const { code, data } = await getBLEDeviceServices(deviceId)
  if (code === Result.Success.code) {
    const { serviceId } = data
    const {
      code,
      data: { notifyCharacteristicId, writeCharacteristicId }
    } = await getBLEDeviceCharacteristics(deviceId, serviceId)
    if (code === Result.Success.code) {
      return new Result(Result.Success.code, {
        deviceId,
        serviceId,
        notifyCharacteristicId,
        writeCharacteristicId
      })
    }
    return Result.Fail
  }
  return Result.Fail
}

// 获取设备的服务
function getBLEDeviceServices(deviceId) {
  return new Promise(resolve => {
    uni.getBLEDeviceServices({
      deviceId,
      success(res) {
        let serviceId
        for (let i = 0; i < res.services.length; i++) {
          if (res.services[i].uuid.indexOf('FFF0') !== -1) {
            serviceId = res.services[i].uuid
          }
        }
        if (!serviceId) {
          resolve(Result.Fail)
          return
        }
        resolve(new Result(Result.Success.code, { serviceId }))
      },
      fail() {
        resolve(Result.Fail)
      }
    })
  })
}

// 获取服务的特征值
function getBLEDeviceCharacteristics(deviceId, serviceId) {
  return new Promise(resolve => {
    uni.getBLEDeviceCharacteristics({
      deviceId,
      serviceId,
      success(res) {
        let notifyCharacteristicId
        let writeCharacteristicId
        for (let i = 0; i < res.characteristics.length; i++) {
          const characteristic = res.characteristics[i]
          if (characteristic.properties.notify) {
            notifyCharacteristicId = characteristic.uuid
          }
          if (characteristic.properties.write) {
            writeCharacteristicId = characteristic.uuid
          }
        }
        if (notifyCharacteristicId && writeCharacteristicId) {
          resolve(
            new Result(Result.Success.code, { notifyCharacteristicId, writeCharacteristicId })
          )
        } else {
          resolve(Result.Fail)
        }
      },
      fail() {
        resolve(Result.Fail)
      }
    })
  })
}

// 订阅特征值
function notifyBLECharacteristicValueChange(deviceId, serviceId, characteristicId) {
  return new Promise(resolve => {
    uni.notifyBLECharacteristicValueChange({
      deviceId,
      serviceId,
      characteristicId,
      state: true,
      success() {
        resolve(Result.Success)
      },
      fail() {
        resolve(Result.Fail)
      }
    })
  })
}

// 断开与低功耗蓝牙设备的连接
export function closeBLEConnection(deviceId) {
  return new Promise(resolve => {
    uni.closeBLEConnection({
      deviceId,
      success() {
        console.log('断开连接成功')
        resolve(Result.Success)
      },
      fail() {
        console.log('断开连接失败')
        resolve(Result.Fail)
      }
    })
  })
}

// 写入特征值
export function writeBLECharacteristicValue(deviceId, serviceId, characteristicId, binaryData) {
  return new Promise(resolve => {
    const count = Math.ceil(binaryData.length / 20)
    let successCount = 0
    for (let i = 0; i < count; i++) {
      const writeData = binaryData.slice(i * 20, i === count - 1 ? binaryData.length : (i + 1) * 20)
      uni.writeBLECharacteristicValue({
        deviceId,
        serviceId,
        characteristicId,
        value: writeData.buffer,
        success() {
          successCount++
          if (successCount === count) {
            resolve(Result.Success)
          }
        },
        fail() {
          resolve(Result.Fail)
        }
      })
    }
  })
}