Props on the nature subscription, I had a subscription with physical copies that were fun to thumb through to really get a scope on my lack of understanding of everything in the world.

Why acedemic journals? Each article are all bleeding edge experimentation and theory that only the authors a handful of people really understand.

O’Reilly has a great subscription option and their books are very comprehensive and easy to read.

Otherwise I’d have to install a gui

If you’re already using an esp32 why not just get a simple ultrasonic sensor and measure flow on an indoor inlet pipe? You may need to know the pressure (probably 1.7 kPa) and temperature but that should be possible to calibrate against your meter readings

Then your project just becomes a simple pipe clamp that can be indoors

This just seems to be detecting if the browser is Firefox. The function is even named isGecko which is Mozilla’s browser engine used by Firefox. Edge, IE (Trident) don’t return true from isGecko

Unless I’m missing something I don’t see where the delay is added