The diffusion of smart home technologies has so far been limited, due to costs, uncertainty about advantages, privacy problems, IT security problems and technological risk. A major limitation to the implementation of home automation systems was due to the number of devices and manufacturers. These ones often could not communicate with each other, forcing the use of specific products and operating systems. Furthermore, the costs associated with the purchase of smart appliances, devices, etc., together with the installation and wiring costs imply that smart home systems cannot be a choice for everyone, becoming key barriers for smart home development. Thanks to the modularity of the smart key design, it is possible to create a smart home in small steps, Finally, the use of user-friendly systems will make the use of smart devices easier, via smartphone, with intuitive interfaces. In this paper, a weather station was created, realized through Arduino, which can easily go to manage different devices inside a home for the control of electrical loads. The system test results show that the control and monitoring functions can be done from a device connected to a network supporting html. The hardware and software of the proposed system are implemented within this paper. The present work contributes to the development of home network worldwide.