The components subdirectory contains external libraries along with other libraries that are developed as part of FRI.

The libraries are grouped per category within the components subdirectory.

aws_iot: Includes the components used to make a connection to AWS IoT Core. connectivity: Includes the components used to establish networking. freertos_kernel: Includes the FreeRTOS kernel. security: Includes components that enhance security. tools: Includes components providing tools used by applications.

Each comprise two parts:

• library - the external library source code.
• integration - additional integration code for the library to build application.

The integration subdirectory contains distinct directories:

• src - contains integration source code files
• inc - contains integration header files
• patches - contains patch files to be applied to the library

A modular approach is used to create the components. Two CMake targets are created for each component:

• library target (if one is not already provided).
• library configuration target for applications to customise the target for their use cases.