I have been searching for software that provides a sensor panel much like what is provided by Aida64 on Windows. Since I got no luck, just text based dumps of statuses, I decided to write my own.

So first question: is there a DLL in the OS that exposes the sensors at the hardware level? NOTE I'm talking code NOT some script to scrape.

(I'm a retired C# developer and this is the first program I will be writing on Linux)

My personal favorite for this GKrellM. It should be in your repos.

There's also conky.

There may be others that I'm not aware of.

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I’d check perl or python code bases…is there such for c ? I don’t know.
I get most of what you seek using webmin https://webmin.com/

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For voltage and temperature there is lm-sensors api.
https://wiki.archlinux.org/title/Lm_sensors

Memory usage is from /proc/meminfo

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Hardinfo?

https://itsfoss.com/hardinfo/

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Process the files in proc and sys from C directly rather than a script. This is how I do return the current installed version of a mod for Battle.net games to my terminal.

Background: Just to be sure that everyone knows what @jmgibson1981 is referring to:

"Directories" such as /dev, /proc, /sys are actually kernel APIs. These directories and their contents don't physically exist. The kernel instantly generates what you see when you list the "files and directories" that are in them, and when you read those "files." Some of the "files" are also writable. (When you, as a properly privileged(?) user, "write to those that support writing," something happens.)

It's the most elegant kernel-API strategy that I have ever seen used anywhere – and I've worked with a lot of operating systems over these many years.

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Another option one can do is what is described here My LQ blog. All this does is allow you to see System Stats via xconsole(1)

Setup is a bit more complex, but works on Linux and *BSD. Also what is described can show just about anything you may want. The attached print shows what it looks like for me.

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Just so people know...THIS is what I am looking for running under Linux.

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I'd try google, it gives links like this: https://alternativeto.net/software/a...platform=linux

Hmmmph. The OP needs to stop talking about their coding prowess, and get on with it. The data are there, go write the display you prefer.

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This should be possible with conky. if you do a search on conky configs you may find one that is close.

In the Linux world, the necessary "hardware interfaces" should be exposed as "files and directories," probably in /sys. The necessary support will be provided as a "kernel module" which must be loaded.

The remaining user-level software can then process this raw information into a more usable and friendly form. This might be in the form of an ".so" library (the Linux equivalent of a "DLL").

But: you are e-n-t-i-r-e-l-y dependent on the hardware vendor for this sort of thing ...