Number of Assets per Sitewise project

Question

Hello,  
I'm trying to add multiple assets to a project using the BatchAssociateProjectAssets API: https://docs.aws.amazon.com/iot-sitewise/latest/APIReference/API_BatchAssociateProjectAssets.html, it looks like there is only one asset that can be added to a project. From the sitewise quotas page, it says,  
  
Number of root assets per project	1  
  
However the API accepts multiple assetId's : https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/iotsitewise.html#IoTSiteWise.Client.batch_associate_project_assets  
  
So i'm a bit confused here, What exactly does a root asset mean, when i add assets which are from another asset hierarchy (non-root), i'm receiving the LimitExceededException, please can someone clarify,  
  
1.  how many assets can be added to a project?   
2. and what exactly is a root and non-root asset in this case (I have tried adding both, and they failed)?  
  
So, i'm only able to have only 1 asset added to a project, so i'm wondering whether a non-root asset can be added at all, if yes, how?  
  
Thank you.  
  
Simith  
Rackspace Technology  
  
Edited by: simithrackspace on May 24, 2021 8:39 AM

Answer

Thanks Ivan for your answer.  
  
Simith  
Rackspace Technology

Answer

Hi Simith,  
  
As of now, only one asset can be added to a project using the BatchAssociateProjectAssets API. This one asset is referred to as the root asset, and the project will then implicitly have access to all children of it in its asset hierarchy.  
  
When you add an asset that is not in the asset hierarchy of the existing root asset associated with the project, you will receive the LimitExceededException due to the service quota of "Number of root assets per project: 1". You can either rearrange your asset hierarchy to include this asset in the existing root asset's hierarchy, or create a separate project to view this asset.  
  
Thanks,  
Ivan

Number of Assets per Sitewise project

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