Architecture diagram for those new to HA

Requested Basic architecture explanation

New to HA I found it difficult to get my head round the hw and sw architecture. How it all fits together. To make it clear that some (lots?) of hw items need a device between them and the HA software. To show where sw blocks fit, how extensions integrate etc.

Exactly what I needed! You just saved me several hours. Thanks!

So there is no architectural diagram, naming the parts and showing their interconnection, either hardware or software?

Did you not see what you wanted here Core Architecture | Home Assistant Developer Docs

It is hard to understand exactly what you are after if that doesn’t show it.

Thanks @nickrout - very helpful. A partial solution?
Doesn’t show how that (system level) links in to a newbies minimal comprehension of HA?
Hardware: (For me) the rpi4, another (zigbee) interface, wifi to devices.
Software, how the core architecture (4 variants?) link to scripts, config files, automations etc etc?
I find it hard to get to grips with. I’m assuming documentation links are the easiest way in for new readers?
Other possible questions - what is ‘hard’ / expensive to link in? Philips Hue bridge, other kit needing bridges, these issues could be a starting point for some (many?).
Willing to help, but very amateur atm?

With more than 1000 integrations, it is difficult to draw a diagram for all, since each integration has it’s peculiarities.

Quite agree (Assuming my guess that an integration is ‘linking’ a device to HA).
So at a higher level, what generalisations can be made?
A system level diagram should not depict ‘peculiarities’ but generalities - to give an idea
of what to look for?

Which products have you purchased (let alone received for free) that come with all the extensively detailed diagrams you have requested?

It would be helpful to see their diagrams to get a better idea of what you want.

What I did was read the documentation cover to cover and read many integration docs and spent time reading in the forum.