last edited: Fri, 05 Apr 2019 21:30:34 +0200  
In germany many houses still use old electric meters, where a rotating disk with a red mark shows the power consumption. My house has some of them as well

My goal is to track power consumption by somehow counting the red mark passing by. Searching the web I found some recipes that use a ESP8266 board and a IR sensor to achieve that goal. But in the end none of those recipes really satified my demands and I'm not sure any of those recipes is running in the wild.

So this article will grow with added experience from my journey into how I finally managed to get the setup working.