Since I switched to a flexible electricity tariff (Tibber in my case) at home, I was looking for a way to indicate the current price level as well as the trend for the next few hours in an easy way.
After some search, I found a project by Till-83 on Github which does exactly that with an 8x8 LED-matrix and a Wemos D1 Mini.
I designed a small case for the LED-matrix and the D1mini that allows to power the microcontroller via a standard Micro-USB cable.
What you need to complete this:
Thanks to Till-83 for sharing his code on Github!
The author marked this model as their own original creation.