The trend in building automation is increasingly towards distributed information and control networks. We take this development into account by using the LonWorks® technology for your sun protection control. The SE-BII allows the connections of conventional meteorological sensors. It provides sensor data in the form of network variables on the LON network. Sensors for temperature, relative humidity, luminance, wind speed, wind direction and rain can be connected. In addition it is possible to connect a DCF77 radio clock receiver in order to realize a real-time clock. The SE-BII calculates the position of the sun in dependence of the time and its geographic position. The application can be loaded via the LON network.