In this tutorial we will show how to build WiFi touch screen thermostat. ESP8266 WiFi touch screen thermostat is example of complex sensor build by ESP8266 EasyIoT Arduino library. We will use Arduino Mega 2560 and TFT 3.2" touch screen display. You will be able to access and control thermostat securely from remote locations. Thermostat will also show some additional data, like outdoor temperature, air pressure and weather forecast.