So I made a person counter for the company where I work. Actually it is a beginners project and could have been done with an Arduino an Attiny85 or a Raspberry Pico. I chose for the ESP8266 for future expansion which is explained in the story.
It started on a breadboard and finished on stripboard.
Story, sourcecode and schematics in my weblog:
http://lucstechblog.blogspot.com/2021/0 ... unter.html