WSN based Advanced Emergency Fire Alarm System Using MQTT Centric Star Topology

Abstract

This project proposes an ‘Advanced Fire alarm’ system based on ‘Wireless Sensor Network (WSN)’ in order to ensure safety and security, especially for industries which in turn save lives and property. In short, it works automatically based on the instantaneous atmospheric variation related to temperature and gas leakage, and confirms the danger yet to occur. WSN has been interfaced with the whole system. Traditional wiring systems excluded hereby introducing ‘Internet of Things (IoT)’. The system divided into two parts such as ‘Master Control Panel’ and ‘Child Sensor Nodes’, whereas a master can control the information provided by multiple peripheral devices and log it to the website. Each device consists of two sensors such as MQ-2 sensor, $100\ K\Omega$ NTC thermistor, and ESP8266 Wi-Fi module. The information of two different parameters associated with fire has been monitored through child devices. Master device collects all data and updates the server. As a result, user can monitor them through IoT panel. The web panel is equipped with ‘Message Queuing Telemetry Transport (MQTT)’ broker, gather information about gas leakage and temperatures in the environment. The time response of sensor nodes, amount of time dissipates to receive data in control panel, and manual control has been recorded. All the child devices can talk to the master control panel and exchange data between them as a form of Star Topology architecture. These factors will make the system much easier to operate and seed information from device to device.