Great…!! Thanks again.
Just to understand the link between lib and demo
The Demo in the link below
https // github com/aws/aws-iot-device-sdk-embedded-C/tree/main/demos/fleet_provisioning/fleet_provisioning_with_csr
Use the library in the below link?
https // github com/aws/Fleet-Provisioning-for-AWS-IoT-embedded-sdk
Is it that sort?