I built a small device that shows when electricity is cheap or expensive in real time (no app)

I’ve been experimenting with a small ESP-based project lately.

The idea is very simple: instead of checking electricity prices or apps all the time, the device just gives a quick visual signal:

- green = good time to use electricity

- red = expensive

- yellow = in between

So you can just glance at it and decide when to run things like washing machine, dishwasher, etc.

No app, no notifications, just a small screen + LED.

Still testing different approaches depending on country pricing systems.

Curious what you guys think — does something like this make sense in real life, or is it overkill?