An IoT based smart thermostat

The heating system and related thermostat is an important part of any home. As part of a solution for an intelligent home, the thermostat needs to behave in a way that controls the heating system to save the energy by providing automatic adjustments. In this paper, an IoT based smart thermostat is designed and implemented. The nodes in the system consist of DHT22 temperature sensors connected to Arduinos and communicating with each other through nRF24L01 modules. The sink node uses an ESP8266 to the Internet. The system can interact with authorized family members through a mobile application by sending push notifications. They also can adjust the home heating settings via this application. In this way, the system can intelligently turn the heating system on or off considering the availability of people at home. In addition, the system can adjust the rooms' temperature automatically and save the energy.