Pointing a camera at a pressure gauge and recording a graph is something that I would have found useful and have thought about writing. Does software like that exist that’s available to consumers?
frigate can be setup to do this I believe, but its overkill. Openclaw could do it, slightly less overkill.
Look into opencv.
I'm pretty sure claude will one shot this for you, including making you a home assistant dashboard item if you ask it.