Monitor the last known state of your vehicles
Important
Access to certain AWS IoT FleetWise features is currently gated. For more information, see AWS Region and feature availability in AWS IoT FleetWise.
You can monitor the last known state of your vehicles in near-real time by creating
state templates and associating them with your vehicles. Vehicles associated with state
templates stream telemetry data with either an onChange or periodic update
strategy. With an on-change update strategy, the associated vehicles stream telemetry data when there is a change. During a periodic update
strategy, the associated vehicles stream telemetry data during a specified time period.
With on-demand operations, you can request the current vehicle state at one time (fetch). You can also activate or deactivate previously deployed state templates to start or stop reporting vehicle state data. Last known state operations are performed using the AWS IoT command APIs.
Each state template contains the following information.
name-
The unique alias of the state template.
signalCatalogArn-
The Amazon Resource Name (ARN) of the signal catalog associated with the state template.
stateTemplateProperties-
A list of signals from which data is collected. The state template properties determine the specific signal updates the vehicle sends to the cloud.
dataExtraDimensions-
A list of vehicle attributes to be included in the protocol buffers (Protobuf) encoded processed data.
metadataExtraDimensions-
A list of vehicle attributes to be published with the processed data as an MQTT 5 user property.
id-
A unique, service-generated identifier.
For methods to collect data sent by a vehicle that uses the Edge Agent for AWS IoT FleetWise software, see Process last known state vehicle data using MQTT messaging. For more information about how to associate a state template with a vehicle, see Create an AWS IoT FleetWise vehicle.
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