I HATE seven segment, but that's your problem/taste.
Using a browser has some things going for it and other things going against it.
You have to make it refresh or something.
Quoth's idea isn't bad, a Raspberry Pi add-on eink screen.
Here's a 7.5"
https://www.amazon.com/waveshare-7-5.../dp/B075R4QY3L
OTOH, that doesn't have a frontlight or a case.
And it says "less than 5 second refresh time".
Most? Many? of us here have enough retired ereaders to repurpose.
I use a B&N Glow3 with a very simple app that listens on TCP for field IDs and text values.
But, since I hate gratuitous radio communications, I don't use WiFi.
You have to have the thing plugged in anyway, why not use USB?
ADB allows port forwarding. I plug the Glow3 into the RPi.
The RPi has a system daemon spitting out updates over TCP.
In my case, it just updates everything once a minute, but you could update individual fields whenever you wanted.
I've had this a number of years and it used to be a B&N NST without frontlight.
When I updated to the Glow3 I got sick of the USB running out of the bottom of the case.
So I removed the USB connector and wired the USB internally to run down the inside of the mic stand gooseneck.
Now it's much cleaner.
Oh, I got tired of that big "F" and changed it a while ago.
I'm still trying to figure out what you mean by milliseconds and tablespoons.
