Weather Station Protects the Smart Building from Sun, Wind, Rain and Frost

Weather station for smart homes and compact company buildings

Windancer KNX with cup anemometer for reasonably priced KNX projects

The Windancer weather station provides the most important weather and outdoor data for a building automated with KNX in just one device. And not only that: the Windancer KNX-GPS model also controls the sun protection on up to 8 façades. Enough for the private Smart Home, but also for an apartment building, a company headquarters or an office building. A façade means a group of shades such as blinds, awnings or roller shutters with the same automatic settings. In a residential house, for example, this could be the four sides of the building, plus a separate setting for the recessed area on the terrace.

Sun protection …

The sun sensor is the core of the shading system. There are two Windancer models: Windancer KNX has three sun sensors and provides the brightness from the east, south and west. Windancer KNX-GPS has one sun sensor with which the brightness is homogeneously recorded during the course of the day. The device calculates the current position of the sun from time and position. The data is supplied by an integrated GPS receiver. One advantage of this method is that the weather station can control the shades at precise angles according to the height and direction of the sun. The slats are therefore only closed so far that no direct sun shines in. It is even possible to define how far the sun is allowed to shine into the room, i.e. where the shadow edge should run along the floor.

The sun automatic takes into account the compass direction of the sun and the shade of the trees

The slats of the blind are adjusted according to the height of the sun

The sun automation takes into account the shadow cast by the roof overhang and knows the shadow edge

… and protection of the sunshade equipment

The other sensor values of the Windancer help to protect the building and especially the sunshade from adverse weather. Sensitive awnings are retracted in case of rain or snow. The heated sensor ignores dew and fog and reacts quickly when the precipitation stops. The "Rain Yes/No" information can also be used for window control in the KNX system.

In frosty conditions, shades are not extended to prevent them from freezing in the rails. Many a blind or roof awning has torn because the motor pulled on the cord/cloth and the guide rail was iced up. The frost alarm reliably prevents this. The outside temperature also becomes interesting when it gets too hot. Then the sunshade is moved to the set heat protection position to keep out radiant heat, even if other conditions of the sun control are not fulfilled.
The temperature value of the Windancer KNX can of course also be used for other controls in the KNX system, for example for heating or air conditioning.

In the event of a wind alarm, blinds and awnings are retracted and blocked for manual operation to prevent storm damage. The wind speed is also often used for ventilation control via KNX.

In contrast to other Elsner weather stations, Windancer KNX measures the wind speed mechanically via a cup cross. This method is explicitly required in some project requirements. The main advantage is the lower costs, as standard components are used and the wind sensor does not have to be calibrated individually.  
If you are interested in weather stations with noiseless electronic wind measurement, we recommend Suntracer KNX sl as an alternative. 


Time switching is often required for roller shutters and blinds. With Windancer KNX-GPS, this is realised in two steps. First, sequences for daily events are defined in the weekly time switch. In the internal logic module, the sequence can then be combined with events so that important alarms from wind or rain are also observed in time functions. 

With the calendar timer, events are defined that change, for example, according to the season. In this case, the time switching is only carried out in a defined date range.

Profile of Windancer

Windancer KNX

  • 3 brightness sensors for east, south and west sun
  • heated precipitation sensor
  • mechanical wind sensor for wind speed
  • temperature sensor
  • 6 AND and 6 OR logics

Windancer KNX-GPS

  • 1 brightness sensor, calculation of the position of the sun from GPS data
  • GPS receiver for time and position
  • heated precipitation sensor
  • mechanical wind sensor for wind speed
  • temperature sensor
  • shading control for 8 fronts
  • weekly time switch with 4 sequences per day
  • calendar timer with 3 time periods
  • 6 AND and 6 OR logics

Practical details for easy installation

Just one of many details: the angle to the wall can be adjusted on the mounting bracket. This means that even with overhanging walls or sloping masts it is no problem to align the weather station correctly and thus create optimal measuring conditions.

The supply line can be led out of the housing in front of the mount and surface-mounted or led directly through the mount into the wall.

There is sufficient space in the housing for connecting the auxiliary voltage and KNX bus line.

Windancer KNX will be available shortly. Curious? Download the KNX app already now and try it out in your ETS project!

KNX Application Windancer KNX

KNX Application Windancer KNX-GPS