How to Transfer of free parameters from Raspberry

First of all, thank you for what you are doing. This project is ideal, I hope that it will develop further
I want to judge that I do not have experience in C ++, only Bash and Python. That’s why, I’ll ask, maybe a stupid question, sorry)

If I want to transfer some data to the cloud database, for example, download cpu from my raspberry (in general, it’s orangePi, but I think it does not matter). What should I write? Offcourse I see an example with an online console, but I could not copy and run this project.

Do I understand the logic of work correctly?
The client (arduino, raspberries …) sends data to the specified address, and the platform processes them and writes them to the graphics (panel), so it does not matter what to send, any numbers from any values?
Thank you