IoT SiteWise OPC-UA collector - Amazon IoT Greengrass
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IoT SiteWise OPC-UA collector

The IoT SiteWise OPC-UA collector component (aws.iot.SiteWiseEdgeCollectorOpcua) enables Amazon IoT SiteWise gateways to collect data from local OPC-UA servers.

With this component, Amazon IoT SiteWise gateways can connect to multiple OPC-UA servers. For more information about Amazon IoT SiteWise gateways, see Using Amazon IoT SiteWise at the edge in the Amazon IoT SiteWise User Guide.


This component has the following versions:

  • 2.2.x

  • 2.1.x

  • 2.0.x


This component is a generic component (aws.greengrass.generic). The Greengrass nucleus runs the component's lifecycle scripts.

For more information, see Component types.

Operating system

This component can be installed on core devices that run the following operating systems:

  • Linux

  • Windows


This component has the following requirements:

  • The Greengrass core device must run on one of the following platforms:

    • OS: Ubuntu 18.04 or later

      Architecture: x86_64 (AMD64) or ARMv8 (Aarch64)

    • OS: Red Hat Enterprise Linux (RHEL) 8

      Architecture: x86_64 (AMD64) or ARMv8 (Aarch64)

    • OS: Amazon Linux 2

      Architecture: x86_64 (AMD64) or ARMv8 (Aarch64)

    • OS: Debian 11

      Architecture: x86_64 (AMD64) or ARMv8 (Aarch64)

    • OS: Windows Server 2019 or later

      Architecture: x86_64 (AMD64)

  • The Greengrass core device must allow outbound network connectivity to OPC-UA servers.


When you deploy a component, Amazon IoT Greengrass also deploys compatible versions of its dependencies. This means that you must meet the requirements for the component and all of its dependencies to successfully deploy the component. This section lists the dependencies for the released versions of this component and the semantic version constraints that define the component versions for each dependency. You can also view the dependencies for each version of the component in the Amazon IoT Greengrass console. On the component details page, look for the Dependencies list.

The following table lists the dependencies for all versions of this component.

Dependency Compatible versions Dependency type
Greengrass nucleus >=2.3.0 <3.0.0 Hard
Stream manager >2.0.10<3.0.0 Hard
Secret manager >=2.0.8 <3.0.0 Hard

For more information about component dependencies, see the component recipe reference.


This component doesn't have any configuration parameters.

Output data

This component writes BatchPutAssetPropertyValue messages to Amazon IoT Greengrass stream manager. For more information, see BatchPutAssetPropertyValue in the Amazon IoT SiteWise API Reference.

Local log file

This component uses the following log file.

To view this component's logs
  • Run the following command on the core device to view this component's log file in real time. Replace /greengrass/v2 or C:\greengrass\v2 with the path to the Amazon IoT Greengrass root folder.

    sudo tail -f /greengrass/v2/logs/aws.iot.SiteWiseEdgeCollectorOpcua.log
    Windows (PowerShell)
    Get-Content C:\greengrass\v2\logs\aws.iot.SiteWiseEdgeCollectorOpcua.log -Tail 10 -Wait


This component is released under the Greengrass Core Software License Agreement.


The following table describes the changes in each version of the component.




New features
  • Adds support for installing Data Collection Pack on Linux ARMv8 architecture.

  • Minimum requirements for Linux ARMv8:

    • Memory: 4 GB

    • CPU: ARM Cortex-A72 or equivalent specification

Bug fixes and improvements
  • Improves logging of metrics in node discovery process.

  • Improves handling of unsupported data types.

  • Improves logging of data stream errors.


New features

Adds support for Windows Server 2019 or higher.

Bug fixes and improvements
  • Improves error messages when you deploy this component on unsupported devices.


Adds support for configuring the following subscription properties.

  • DataChangeTrigger ‐ You can define the condition that initiates a data change alert.

  • QueueSize ‐ The depth of the queue on an OPC‐UA server for a particular metric where notifications for Monitored Items are queued.

  • PublishingIntervalMilliseconds ‐ The interval (in milliseconds) of a publishing cycle specified when a subscription is created.

  • SnapshotFrequencyMilliseconds ‐ You can configure the snapshot frequency timeout setting to ensure that Amazon IoT SiteWise Edge ingests a steady stream of data.

This version supports ingestion of BAD quality data and filters data based on the following data qualities:

  • UNCERTAIN quality data

  • BAD quality data

Bug fixes and improvements.

  • Improvements to customer metrics.

  • Fixes the security encoding that sometimes caused issues when connecting to servers with encryption enabled.

  • Fixes an issue where the property group failed to update.


Bug fixes and improvements.


Bug fixes and improvements to asset priority syncing with edge.


Initial version.

See also