With the advance of science and technology, people have a desire for convenient and\ncomfortable living. Creating comfortable and healthy indoor environments is a major consideration\nfor designing smart homes. As handheld devices become increasingly powerful and ubiquitous,\nthis paper proposes an innovative use of smart handheld devices (SHD), using MIT App Inventor\nand fuzzy control, to perform the real-time monitoring and smart control of the designed intelligent\nwindowsill system (IWS) in a smart home. A compact weather station that consists of environment\nsensors was constructed in the IWS for measuring of indoor illuminance, temperature-humidity,\ncarbon dioxide (CO2) concentration and outdoor rain and wind direction. According to the measured\nenvironment information, the proposed system can automatically send a command to a fuzzy\nmicrocontroller performed by Arduino UNO to fully or partly open the electric curtain and electric\nwindow for adapting to climate changes in the indoor and outdoor environment. Moreover, the IWS\ncan automatically close windows for rain splashing on the window. The presented novel control\nmethod for the windowsill not only expands the SHD applications, but greatly enhances convenience\nto users. To validate the feasibility and effectiveness of the IWS, a laboratory prototype was built and\nconfirmed experimentally.
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