html “input” field “update” from my home machine (or similar)?

Is there any way to remotely update a field like an html input field? I guess this would require some css, php or javascript on my WordPress site? And some code that I could import into (like) Xcode (like Swift), compile and run as a background task on my own PC.

Aside and background: I have data that I will pick up from another board that takes it via radio from my aquarium controller [1].

Alternative or even what I’d like to see in a WordPress page. Several companies have set up servers to handle IoT data from amateurs, like Adafruit.IO. The high level question would then be whether there exists a plugin and client side code examples (or even just some protocol and how to connect)? Of course, such a ready plug-and-play may even give me a free mobile App to see the data in.. But I thought that a WordPress page may really be what I’m after. To see how my fishes might be doing when I’m away from home.

I would avoid setting up a private server on the inside of my home network. That’s why I am searching for alternatives.

But the crux is whether the kind of usage that I’d like to see in my WordPress page is allowed by WordPress or my ISP. Or whether this is dependent on bandwidth.

[1] My aquarium’s data radioed through the shelf Disclaimer: no money, gifts, ads – only fun and expenses on my blog
[2] Adafruit.IO LoRa Windows 10 IoT Core Field Gateway #AdafruitIO #IoTuesday Same disclaimer, no other purpose with this link than to show what I mean

The page I need help with: [log in to see the link]