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NOTE: The AWS IoT Device Shadow library and documentation are in the FreeRTOS Labs.  The libraries in the FreeRTOS Labs download directory are fully functional, but undergoing optimizations or refactoring to improve memory usage, modularity, documentation, demo usability, or test coverage.  They are available as part of the main download.

AWS IoT Device Shadow Library – A FreeRTOS Labs Project


The AWS IoT Device Shadow library enables you to store and retrieve the current state (the “shadow”) of every registered device. The device’s shadow is a persistent, virtual representation of your device that you can interact with in your applications even if the device is offline. The device state captured as its “shadow” is itself a JSON document. You can send commands over MQTT or HTTP to query the latest known device state, or to change the state.  Each device’s shadow is uniquely identified by the name of the corresponding “thing”, a representation of a specific device or logical entity on the AWS Cloud. See Managing Devices with AWS IoT for more information.

More details about shadows can be found in AWS IoT documentation.

Each library can be freely used and is distributed under the MIT open source license

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