In this paper, a fire detection sensor was actually used, which was realized using the Arduino platform. The Arduino is an open source platform used to build various electronics projects. The experimental part of the paper consists of the ESP8266 Wemos D1 wi-fi board programmed in the Arduino IDE software. The D1 board is connected by an analog pin to the MQ-2 smoke sensor from which it reads values in case of ideal air conditions, and in conditions when a fire occurs. It sends the read values via the wi-fi network to the MQTT server, and in case the upper limit value shown by the sensor is exceeded, it reports to the control panel that a fire has occurred. The Arduino platform combined with the MQ-2 sensor and MQTT server proved to be a great solution for fire detection. Due to its high-quality workmanship, the MQ-2 sensor read precise values of smoke concentration in the air, and once again showed that it is one of the most commonly used sensors for fire detection and prevention. Also, the Arduino D1 board did not fail in performing its task, and it can be clearly concluded that it works quickly and efficiently, primarily due to the fast reading of data from the sensor, and thus due to wi-fi communication with the MQTT server which makes it much more compact. to most other Arduino boards that are not compatible for wi-fi communication, and need an external upgrade to be able to communicate with the MQTT server. The MQTT IoT Panel, although easy to use, proved to be a great program for communicating with the Arduino D1 board, and this measurement with efficient reception of information made its graphics more fun.