Thank you for your suggestion!
I had a brief look at the app and article you sent, and must admit that I’m yet to fully understand how to create a custom automation URL.
After a bit of tinkering however I was able to get it working somehow. 
I’ll probably still look for some further reading material later today in order to better understand how this works.
This is a great solution and I am so very grateful.
I couldn’t be happier to have found this forum, you seem to be a cool bunch.