Sorry, we do not have examples or threads for reference. But the examples with the Thingworx C SDK should be a good place to start. I couldn't find the files which actually interact with the hardware but those files need to be modified to interact with our peripheral driver library (PDL).
I have never used Thingworx before and am not sure how the integration process with any MCU would be, but I think you will have to write a abstraction layer on top our PDL which interacts with the Thingworx C SDK and this is going to be difficult and time consuming.
If your application needs to send data to cloud, I would suggest you looking into code example: AWS_IoT_Publish_Subscribe_Code_Examples - This repository contains the code examples and ... | Mbed
It uses mbed-os and sends data to the Internet thing in AWS Cloud using an MQTT channel. This is very easy to begin with and mbed-os has a fairly simple learning curve. More information here.
Regards,
Dheeraj
