The smart home system has been developed since 1980s. Its first application was built in 1984, in Turkey. In these first steps, the focused group was only people without disabilities. Initially, manufacturers tried to create all-in-one systems, yet the final products were all gadget-like and minimalistic. (Energy control units, security systems, light controllers, etc.) Smart homes have various application areas. Controlling central air conditioning in modern high-rise buildings, malls with parameters such as temperature and humidity is an example of real-time programming of these devices. The main idea here is to control the capacity of air conditioning equipment in order to save energy, thus saving money. The goal of our article is to make life easier with the help of computer science. With our knowhow and extra research of available information, by using the software portions and the hardware components, we aim to create a sensor-based smart home system. Basically, the system is getting the data from the sensors placed in different locations in home and transfer it to terminal via Wi-Fi. In the flowchart, the most crucial part is to connect the hardware problem-free. Next thing is to upload the code for these modules to an EEPROM computer to establish connection between devices and to display the information in the terminal screen. The designed system looks like an autonomous computer which can control the air conditioning with the help of various sensors with precision.