If you forget to close the window after using the bathroom in the colder days, you'll waste a lot of energy. If you don’t open your windows yours rooms will get sticky and possibly will mildew. Therefore I needed a reminder indicator when I forget to close the windows.
The RheinEnergie (a local energy provider) and the TH Köln (technical university) are doing a study on the usage of their smart home system. It is based on the Qivicon from Telekom.Read full article ►