# Amazon IoT
<a name="iot"></a>

Amazon IoT provides secure, bi-directional communication between Internet-connected things (such as sensors, actuators, embedded devices, or smart appliances) and the Amazon Cloud. This enables you to collect telemetry data from multiple devices and store and analyze the data. You can also create applications that enable your users to control these devices from their phones or tablets. Amazon IoT includes Amazon IoT Device Management and Amazon IoT Device Defender. Amazon IoT Device Defender allows you to audit the configuration of your devices, monitor your connected devices to detect abnormal behavior, and to mitigate security risks. It gives you the ability to enforce consistent security policies across your Amazon IoT device fleet and respond quickly when devices are compromised.

## Region Availability
<a name="feature-regions"></a>

Amazon IoT is available in the following regions in China:
+ Beijing Region
+ Ningxia Region

## Feature Availability and Implementation Differences
<a name="feature-diff"></a>

The Amazon Web Services in China implementation of Amazon IoT is unique in the following ways:

 **Amazon IoT Core** 

The following are not supported:
+ The Amazon IoT SiteWise rule action
+ Amazon IoT Analytics, Amazon IoT Events, and Amazon Cognito are not supported in the Ningxia Region.
+ Encryption of stored data (data at rest) for the fleet indexing service
+ Alexa Voice Service Integration for Amazon IoT
+ Configurable endpoints

 **Amazon IoT Device Defender** 

The following types of audit checks are not supported:
+ IOT\$1ROLE\$1ALIAS\$1OVERLY\$1PERMISSIVE\$1CHECK
+ IOT\$1ROLE\$1ALIAS\$1ALLOWS\$1ACCESS\$1TO\$1UNUSED\$1SERVICES\$1CHECK

The following audit checks are available in the Beijing Region but not the Ningxia Region:
+ UNAUTHENTICATED\$1COGNITO\$1ROLE\$1OVERLY\$1PERMISSIVE\$1CHECK
+ AUTHENTICATED\$1COGNITO\$1ROLE\$1OVERLY\$1PERMISSIVE\$1CHECK

## Guides and References
<a name="feature-guides"></a>

Amazon Web Services in China user guides are available in HTML and PDF, in both Chinese and English. API references are available in HTML and PDF. Some API references may be available only in English. Currently, not all API references are available in the Beijing and Ningxia Regions. Links to some API references will take you to the global Amazon Web Services site. Note that some features and functionality described in the guides and references may not be available in the current Amazon Web Services in China release.
+  [Amazon IoT Developer Guide](https://docs.amazonaws.cn/iot/latest/developerguide/) 
+  [Amazon IoT API Reference](https://docs.amazonaws.cn/iot/latest/apireference/) 
+  [Amazon IoT Device Defender Developer Guide](https://docs.amazonaws.cn/iot/latest/developerguide/device-defender.html) 
+  [Amazon IoT Device Defender API Reference](https://docs.amazonaws.cn/iot/latest/apireference/) 
+  [Amazon IoT Device Management Developer Guide](https://docs.amazonaws.cn/iot/latest/developerguide/iot-thing-management.html) 
+  [Amazon IoT Device Management API Reference](https://docs.amazonaws.cn/iot/latest/apireference/) 

## General Information About Amazon Web Services in China
<a name="general-info"></a>

The following information applies to all Amazon Web Services that are available in the China Regions.

 **Amazon Web Services Accounts in the China Regions** 

To use services in the Beijing and Ningxia Regions, you need an account and credentials specific to each of those Regions.
+ Accounts and credentials for other Amazon Regions will not work for services operating in the Beijing and Ningxia Regions.
+ Accounts and credentials for the Beijing and Ningxia Regions will not work for other Amazon Regions.
+ For more information, see [Signup, Accounts, and Credentials](accounts-and-credentials.md).

 **Domain for Amazon Web Services in China** 

The domain for Amazon Web Services in China is **www.amazonaws.cn**.

 **Endpoints & Amazon Resource Names (ARNs)** 

For information about endpoints and ARNs in Amazon Web Services in China, see [Endpoints and ARNs for Amazon Web Services in China](endpoints-arns.md).

 ** Availability Zones for the China Regions** 
+ In the Beijing Region, there are three Availability Zones.
+ In the Ningxia Region, there are three Availability Zones.

 **General Information for Amazon Web Services in China** 

The following applies to all Amazon Web Services that are available in the China Regions. For detailed information about specific Amazon Web Services, see the service-specific topic in this guide.
+ Amazon Identity and Access Management (IAM)
  + You can grant or deny a service access to resources using the `Principal` policy element.
  + Service principal values vary by Region.
+ Free Usage Tier
  + For information about Free Tier offers and availability in the China Regions, see [Amazon Web Services China Regions Free Tier](https://www.amazonaws.cn/en/free).

 **Amazon Web Services Console** 

The console for Amazon Web Services in China is unique to China. The screenshots in the Amazon Web Services guides might differ from what you see on your console. For information about differences in service functionality, see the topics for each service in this guide.

 **Code Examples** 

The Amazon Web Services documentation might include endpoints and ARNs in code examples that are not specific to the Beijing and Ningxia Regions. When using examples, verify you are using the endpoints and ARNs for your Region.