# Time series data

Time series data are available for translated iotnodes. When a translated iotnode updates, Yggio saves **numerical** data into a time series database.

Using the REST API you can get time-series-data of a specific attribute from an iotnode.

The following is the format of time series data for an attribute of an iotnode:

```
[
{
"time": String,
"value": Number
},
...
]
```

`time`

is a ISO 8601 timestamp. E.g.: 2019-08-07T12:30:00.00Z.

`value`

is the saved value.

## Set time interval

One can choose to get the data with a set time between each data point. This might be desirable if a high data resolution is not needed. It can improve loading times and performance. The database then uses interpolation to set the values for the data points.

If a set time interval is used the data will have the following format:

```
[
{
"time": String,
"value": Number,
"min": Number,
"max": Number,
"stddev": Number
},
...
]
```

`time`

is a ISO 8601 timestamp. E.g.: 2019-08-07T12:30:00.00Z.

`value`

is the interpolated value.

`min`

is the value of the smallest point in the interpolated area.

`max`

is the value of the largest point in the interpolated area.

`stddev`

is the standard deviation of the points in the interpolation area.