This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::IoTSiteWise::Gateway GatewayPlatform
<a name="aws-properties-iotsitewise-gateway-gatewayplatform"></a>

The gateway's platform configuration. You can only specify one platform type in a gateway.

(Legacy only) For Greengrass V1 gateways, specify the `greengrass` parameter with a valid Greengrass group ARN.

For Greengrass V2 gateways, specify the `greengrassV2` parameter with a valid core device thing name. If creating a V3 gateway (`gatewayVersion=3`), you must also specify the `coreDeviceOperatingSystem`.

For Siemens Industrial Edge gateways, specify the `siemensIE` parameter with a valid IoT Core thing name.

## Syntax
<a name="aws-properties-iotsitewise-gateway-gatewayplatform-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-iotsitewise-gateway-gatewayplatform-syntax.json"></a>

```
{
  "[GreengrassV2](#cfn-iotsitewise-gateway-gatewayplatform-greengrassv2)" : GreengrassV2,
  "[SiemensIE](#cfn-iotsitewise-gateway-gatewayplatform-siemensie)" : SiemensIE
}
```

### YAML
<a name="aws-properties-iotsitewise-gateway-gatewayplatform-syntax.yaml"></a>

```
  [GreengrassV2](#cfn-iotsitewise-gateway-gatewayplatform-greengrassv2): 
    GreengrassV2
  [SiemensIE](#cfn-iotsitewise-gateway-gatewayplatform-siemensie): 
    SiemensIE
```

## Properties
<a name="aws-properties-iotsitewise-gateway-gatewayplatform-properties"></a>

`GreengrassV2`  <a name="cfn-iotsitewise-gateway-gatewayplatform-greengrassv2"></a>
A gateway that runs on Amazon IoT Greengrass V2.  
*Required*: No  
*Type*: [GreengrassV2](aws-properties-iotsitewise-gateway-greengrassv2.md)  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`SiemensIE`  <a name="cfn-iotsitewise-gateway-gatewayplatform-siemensie"></a>
An Amazon IoT SiteWise Edge gateway that runs on a Siemens Industrial Edge Device.  
*Required*: No  
*Type*: [SiemensIE](aws-properties-iotsitewise-gateway-siemensie.md)  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)