Hi Vlado,
Welcome to the forums! There’s more than one way to skin a cat - perhaps too many, we’re spoilt for choice. For something as simple as what you’re describing, checkout @Ryan18728 's IoT chicken coop project for some inpiration:
Here are a few other community projects that involved IoT data visulasation and control:
And here’s a great article I found with a summary of different open source IoT solutions (for doing verious IoT things, not all of them will be suitable for what you’re doing:
I’m keen to see how you go with it