End of support notice: On October 7th, 2026, AWS will discontinue support for AWS IoT Greengrass Version 1. After October 7th, 2026, you will no longer be able to access the AWS IoT Greengrass V1 resources. For more information, please visit [Migrate from AWS IoT Greengrass Version 1](https://docs.aws.amazon.com/greengrass/v2/developerguide/migrate-from-v1.html).

# Core


```
{
"Id": "string",
"ThingArn": "string",
"CertificateArn": "string",
"SyncShadow": true
}
```

Core  
Information about a core.  
type: object  
required: ["Id", "ThingArn", "CertificateArn"]

Id  
A descriptive or arbitrary ID for the core. This value must be unique within the core definition version. Maximum length is 128 characters with the pattern `[a‑zA‑Z0‑9:_‑]+`.  
type: string

ThingArn  
The ARN of the thing that is the core.  
type: string

CertificateArn  
The ARN of the certificate associated with the core.  
type: string

SyncShadow  
If true, the core's local shadow is synced with the cloud automatically.  
type: boolean