计算时间并插入数组

Question

我有一个从外部设备读取值的应用程序。在此之后，这些值被写入数据库。

我有加速度、陀螺仪、磁力计和压力等值。

加速度、陀螺仪和磁力计是这样连同时间一起读取的：

（例如加速）

const buf = Buffer.from(characteristic.value, "base64");
        const [time, ...acc] = [0,2,4,6].map(index => buf.readInt16LE(index));
        this.setState(state => ({
          time,
          acc,
          array_acc_sx: [
            ...state.array_acc_sx, 
            [time , acc ]  
          ]
        }));

对于压力我不能这样做，因为压力没有时间自动。

所以我认为设置一个变量 timeP 等于 acc,gyr,mag 的时间。

但是这样设置时间在读取压力值之前开始，所以结果是这样的：

   "PL":
     "[740,740,740,740,700,700,660,660,580,580,580,
560,500,500,500,500,500,440,400,400,340,340,320,300,
280,260,260,260,200,180,160,160,140,
// there start the time + pressure values.
[140,[0,0,0,0,0]],[160,[0,0,0,0,0]],[160,[0,0,0,0,0]],
[180,[0,0,0,0,0]],[200,[0,0,0,0,0]],[260,[0,0,0,0,0]],
[260,[0,0,0,0,0]],[260,[0,0,0,0,0]],[280,[0,0,0,0,0]],
[300,[0,0,0,0,0]],[320,[0,0,0,0,0]],[340,[0,0,0,0,0]],
[340,[0,0,0,0,0]],[400,[0,0,0,0,0]],[400,[0,0,0,0,0]],
[440,[0,0,0,0,0]],[500,[0,0,0,0,0]],[500,[0,0,0,0,0]],
.....

这是我使用的代码：

async setupNotifications2(device) {
    const service = this.serviceGeneral();
    /* Accelerometro + Giroscopio + Magnetometro */
    device.monitorCharacteristicForService(
      service,
      this.AccGyrMg,
      (error, characteristic) => {
        if (error) {
          this.error(error.message);
          return;
        }
        const buf = Buffer.from(characteristic.value, "base64");
        const [time, ...acc] = [0,2,4,6].map(index => buf.readInt16LE(index));
        this.setState(state => ({
          time,
          acc,
          array_acc_sx: [
            ...state.array_acc_sx, 
            [time , acc ]  
          ]
        }));

        //console.log("this.state.time - ", this.state.time)
        this.setState({timeP: this.state.time})


        const [ ...gyr] = [8,10,12].map(index => buf.readInt16LE(index));
        this.setState(state => ({
          time,
          gyr,
          array_gyr_sx: [
            ...state.array_gyr_sx, 
            [time, gyr]
          ]
        }));

        const [ ...mg] = [14,16,18].map(index => buf.readInt16LE(index));
        this.setState(state => ({
          time,
          mg,
          array_mg_sx: [
            ...state.array_mg_sx, 
            [time, mg]
          ]
        }));

      }
    );

    /* Pressione */
    device.monitorCharacteristicForService(
      service,
      this.Pressure,
      (error, characteristic) => {
        if (error) {
          this.error(error.message);
          return;
        }
        console.log("TimeP - ", this.state.timeP)
        const buf = Buffer.from(characteristic.value, "base64");
        const [...pressure_sx] = [0, 2, 4, 6, 8].map(index => buf.readUInt16LE(index));
        this.setState(state => ({...state.timeP, pressure_sx,array_pressure_sx: [this.state.timeP, ...state.array_pressure_sx, [this.state.timeP, pressure_sx] ]
        }));
      }
    );

在您看来，我该如何解决此类问题？谢谢。

Answer 1

您可以使用 setInterval() 函数来记录每个状态的时间：

var Time = 0;

function resetT()
{
Time=0;
clearInterval(stateT)
console.log("state_reset")
}

function stateInitiate(t)
{
//t will be your unit of time (1 = a millisecond, 1000 = a second)
setInterval(stateT,t)
}

function stateT()
{
 Time++;
}

function init()
{
device.monitorCharacteristicForService(
      service,
      this.Pressure,
      (error, characteristic) => {
        if (error) {
          this.error(error.message);
          return;
        }
        console.log("TimeP - ", Time)//variable time
        const buf = Buffer.from(characteristic.value, "base64");
        const [...pressure_sx] = [0, 2, 4, 6, 8].map(index => buf.readUInt16LE(index));
        this.setState(state => ({...state.timeP, pressure_sx,array_pressure_sx: [this.state.timeP, ...state.array_pressure_sx, [this.state.timeP, pressure_sx] ]
        }));
      }
    );
stateInitiate(1)//adds 1ms every ms
}
init()//begin sequence

如果这就是你要找的东西，请告诉我... :)