Amazon FreeRTOS is an OS for microcontrollers that runs on less power and is remotely deployed as a node or a gateway. Amazon FreeRTOS has all the essential stacks needed to manage a remote device securely.
The above mentioned services were some of the key services from AWS IoT. You can read more at https://aws.amazon.com/iot/.
Now that we are aware of some of the key services from AWS, we are going to make use of them to build our sample application.