Abstract
This paper proposes the creation of a home automation system using an ESP8266 microcontroller and the Blynk application. The system consists of 2 sensors responsible for measuring the temperature/humidity and the level of brightness in the building, a 4-channel relay module responsible for controlling 4 devices/appliances/electrical installations and an LED that demonstrates its control through a PWM signal provided by the ESP8266 microcontroller. Using the Blynk application this system can be controlled and monitored via a Wi-Fi connection directly on the mobile device which makes this system an IoT (Internet of Things) one. The programming of the system was done in the Arduino IDE program using the already existing libraries for the sensors and for the Blynk application. The mobile application used for controlling and monitoring the system is able to display information about temperature /humidity, brightness and on the control side, the application allows the user to individually operate each channel of the relay module and the LED.