2021/08/16 - AWS IoT SiteWise - 1 updated api methods
Changes AWS IoT SiteWise added query window for the interpolation interval. AWS IoT SiteWise computes each interpolated value by using data points from the timestamp of each interval minus the window to the timestamp of each interval plus the window.
{'intervalWindowInSeconds': 'long'}
Get interpolated values for an asset property for a specified time interval, during a period of time. For example, you can use the this operation to return the interpolated temperature values for a wind turbine every 24 hours over a duration of 7 days.
To identify an asset property, you must specify one of the following:
The assetId and propertyId of an asset property.
A propertyAlias , which is a data stream alias (for example, /company/windfarm/3/turbine/7/temperature ). To define an asset property's alias, see UpdateAssetProperty .
See also: AWS API Documentation
Request Syntax
client.get_interpolated_asset_property_values(
assetId='string',
propertyId='string',
propertyAlias='string',
startTimeInSeconds=123,
startTimeOffsetInNanos=123,
endTimeInSeconds=123,
endTimeOffsetInNanos=123,
quality='GOOD'|'BAD'|'UNCERTAIN',
intervalInSeconds=123,
nextToken='string',
maxResults=123,
type='string',
intervalWindowInSeconds=123
)
string
The ID of the asset.
string
The ID of the asset property.
string
The alias that identifies the property, such as an OPC-UA server data stream path (for example, /company/windfarm/3/turbine/7/temperature ). For more information, see Mapping industrial data streams to asset properties in the IoT SiteWise User Guide .
integer
[REQUIRED]
The exclusive start of the range from which to interpolate data, expressed in seconds in Unix epoch time.
integer
The nanosecond offset converted from startTimeInSeconds .
integer
[REQUIRED]
The inclusive end of the range from which to interpolate data, expressed in seconds in Unix epoch time.
integer
The nanosecond offset converted from endTimeInSeconds .
string
[REQUIRED]
The quality of the asset property value. You can use this parameter as a filter to choose only the asset property values that have a specific quality.
integer
[REQUIRED]
The time interval in seconds over which to interpolate data. Each interval starts when the previous one ends.
string
The token to be used for the next set of paginated results.
integer
The maximum number of results to return for each paginated request. If not specified, the default value is 10.
string
[REQUIRED]
The interpolation type.
Valid values: LINEAR_INTERPOLATION | LOCF_INTERPOLATION
For the LOCF_INTERPOLATION interpolation, if no data point is found for an interval, IoT SiteWise returns the same interpolated value calculated for the previous interval and carries forward this interpolated value until a new data point is found.
For example, you can get the interpolated temperature values for a wind turbine every 24 hours over a duration of 7 days. If the LOCF_INTERPOLATION interpolation starts on July 1, 2021, at 9 AM, IoT SiteWise uses the data points from July 1, 2021, at 9 AM to July 2, 2021, at 9 AM to compute the first interpolated value. If no data points is found after 9 A.M. on July 2, 2021, IoT SiteWise uses the same interpolated value for the rest of the days.
integer
The query interval for the window in seconds. IoT SiteWise computes each interpolated value by using data points from the timestamp of each interval minus the window to the timestamp of each interval plus the window. If not specified, the window is between the start time minus the interval and the end time plus the interval.
Note
If you specify a value for the intervalWindowInSeconds parameter, the type parameter must be LINEAR_INTERPOLATION .
If no data point is found during the specified query window, IoT SiteWise won't return an interpolated value for the interval. This indicates that there's a gap in the ingested data points.
For example, you can get the interpolated temperature values for a wind turbine every 24 hours over a duration of 7 days. If the interpolation starts on July 1, 2021, at 9 AM with a window of 2 hours, IoT SiteWise uses the data points from 7 AM (9 AM - 2 hours) to 11 AM (9 AM + 2 hours) on July 2, 2021 to compute the first interpolated value, uses the data points from 7 AM (9 AM - 2 hours) to 11 AM (9 AM + 2 hours) on July 3, 2021 to compute the second interpolated value, and so on.
dict
Response Syntax
{
'interpolatedAssetPropertyValues': [
{
'timestamp': {
'timeInSeconds': 123,
'offsetInNanos': 123
},
'value': {
'stringValue': 'string',
'integerValue': 123,
'doubleValue': 123.0,
'booleanValue': True|False
}
},
],
'nextToken': 'string'
}
Response Structure
(dict) --
interpolatedAssetPropertyValues (list) --
The requested interpolated values.
(dict) --
Contains information about an interpolated asset property value.
timestamp (dict) --
Contains a timestamp with optional nanosecond granularity.
timeInSeconds (integer) --
The timestamp date, in seconds, in the Unix epoch format. Fractional nanosecond data is provided by offsetInNanos .
offsetInNanos (integer) --
The nanosecond offset from timeInSeconds .
value (dict) --
Contains an asset property value (of a single type only).
stringValue (string) --
Asset property data of type string (sequence of characters).
integerValue (integer) --
Asset property data of type integer (whole number).
doubleValue (float) --
Asset property data of type double (floating point number).
booleanValue (boolean) --
Asset property data of type Boolean (true or false).
nextToken (string) --
The token for the next set of results, or null if there are no additional results.