Converting unsupported data types - AWS IoT SiteWise
PrerequisiteLimitations

Converting unsupported data types

Optionally enable data type conversion in AWS IoT SiteWise for simple arrays and DateTime data types. AWS IoT SiteWise doesn't support all OPC-UA data types. When you send unsupported data to your AWS IoT Greengrass data stream, that data is lost. However, by converting the unsupported native data types to strings, you can ingest the data into AWS IoT SiteWise rather than discarding it. AWS IoT SiteWise serializes your converted data so that you can later use your own functions to convert the strings back to their original data type downstream, if needed.

You can update your data type conversion settings for a data source at any time and each data source can have its own settings.

When you add data sources in the AWS IoT SiteWise console, there are two checkboxes under Data type conversion in Advanced Configuration. You can indicate which data types to convert to strings.

  • Convert array values with simple data types to JSON strings

  • Convert DateTime values to ISO 8601 strings

Prerequisite

Limitations

These are the limitations for OPC-UA data type conversion to strings in AWS IoT SiteWise.

  • Complex data type conversion is not supported.

  • String limits after conversion are 1024 bytes. If the string is longer than 1024 bytes, the string is rejected by AWS IoT SiteWise.