In this section, you will program Amazon FreeRTOS to change the on-board LED state based on accelerometer readings reaching a specific threshold. The standard way to perform this actuation through AWS IoT Core is by using Device Shadows. You will learn the details about Reported and Desired state and understand how to drive signals across Amazon FreeRTOS tasks using Queues.

1. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential and Trademark© 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential and Trademark
Lab 4: Command and control
Richard Elberger
Global Partner Solutions Architect – IoT
Amazon Web Services

2. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential and Trademark
Main tasks in this lab
Implement device shadow operations
Implement using two sensors on the same bus with Mutual Exclusion
Implement an alerting mechanism when a value reaches a threshold
Key outcome: learn how Mutual Exclusion works and how it the mechanism
enables blocking on shared resources