In the first part of the thesis I present literature research on the topic of home automation, particularly in the field of devices connected to the Internet. I present what opportunities arise for us if our house is formed by so-called smart house, the benefits of this in terms of everyday life. My task of a smart home is development of an intelligent thermostat. Since there are already other devices such field, striving for competitiveness and price. Price comparisons are made in different functions and tools. Then, I present what functions should my thermostate realize. I describe the development of chips used in smart thermostat and the features provided by them. I will present the tools and the preparation of the microcontroller firmware. Introduce the Internet communication tool for the implementation of the program. A server side PC program is built to demonstrate the TCP communication. The device control program, the PC-side program, the schematic diagrams and the PCB design are uploaded to the Thesis’s attachment.