Based on De Windcentrale, I created a sensor which is a little bit easier to setup. In fact you only need to know the id of the windmill. More information can be found on Xorfor/HA-Windcentrale (github.com). There you will also find a list of all the available windmills with their ids.
Did the following updates:
Added Energy
Correct id for De Boerenzwaluw
Extra attributes
Example to display a graph from the Energy per day
More information can be found on Xorfor/HA-Windcentrale (github.com)
And this week the Windcentrale did an update for their webservices, so that all windmills produce data now!