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This paper presents the design and implementation of an Internet home automation system. The design is based on an embedded controller which is connected to a PC-based home Web server via RS232 serial port. The home appliances are connected to the input/output ports and the sensors are connected to the analog/digital converter channels of the embedded controller. The software of the system is based on the combination of Keil C, Java Server Pages, and JavaBeans, and dynamic DNS service (DDNS) client. Password protection is used to block the unauthorized from accessing to the server. The system is scalable and allows additional appliances to be added to it with no major changes to its core, the home appliances can be monitored and controlled locally, or remotely through a web browser from anywhere in the world provided that an Internet access is available.