About RED Grendel


I love to try out new stuff, integrate systems, software, modules , etc. It is a way to stay up-to-date, keep my technical muscles in shape. RED Grendel is a place where I would like to share (showcase if you want) the stuff that I have done or find interesting.


Probably anything and everything that I am working on:


I will try to do regular updates but it is all very dependent on:

  • How my home automation system is expanding,
  • What new project I can think of for my raspberry Pi’s
  • The

Many times google was my starting point for finding a (partial) solution to a problem I faced. With this site I hope to return the favor, it would be great if what I write here is of help to others.

The name?

I was looking for a good but affordable 3D Printer and after some searching and reading tests on the internet, I chose the Creality Ender 5. My reasons for choosing […]

Doorbell connected to openHAB

Our son of 2 takes afternoon naps. Because of that we pull the doorbell plug every time we expect someone to come to the door.As I am using openHAB for home automation. This article describes a better solution to this “problem”.