# AWS IoT Greengrass Documentation

AWS IoT Greengrass seamlessly extends AWS onto physical devices so they can act locally on the data they generate, while still using the cloud for management, analytics, and durable storage. AWS IoT Greengrass ensures your devices can respond quickly to local events and operate with intermittent connectivity. AWS IoT Greengrass minimizes the cost of transmitting data to the cloud by enabling you to author custom software and AWS Lambda functions that run on local devices.

## AWS IoT Greengrass, Version 2

Version 2 is the current version of AWS IoT Greengrass. This version adds several features such as modular software components and continuous deployments. These features make it easier for you to develop and manage edge applications.

- [Developer Guide](/greengrass/latest/developerguide/what-is-iot-greengrass.html): Walks through how to set up AWS IoT Greengrass V2 and integrate it with other services.
- [API Reference](/greengrass/latest/APIReference/Welcome.html): Describes all the API operations for AWS IoT Greengrass V2 in detail. Also provides sample requests, responses, and errors for the supported web services protocols.
- [AWS IoT Greengrass V2 in the AWS CLI Reference](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/greengrassv2/index.html): Describes the AWS CLI commands that you can use to work with AWS IoT Greengrass V2.

## AWS IoT Greengrass, Version 1



- [Developer Guide](/greengrass/v1/developerguide/what-is-gg.html): Walks through how to set up AWS IoT Greengrass V1 and integrate it with other services.
- [API Reference](/greengrass/v1/apireference/api-doc.html): Describes all the API operations for AWS IoT Greengrass V1 in detail. Also provides sample requests, responses, and errors for the supported web services protocols.
- [AWS IoT Greengrass V1 in the AWS CLI Reference](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/greengrass/index.html): Describes the AWS CLI commands that you can use to work with AWS IoT Greengrass V1.

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