• Author: Paraschiv Theodor-Vlad
• Email: theodor.paraschiv@stud.acs.pub.ro
• Master: SRIC

This project implements a simple, low-cost smoke and gas detection system using an ESP32 microcontroller, an MQ-2 gas sensor, and an active buzzer. The system reads analog gas/smoke concentration values via the MQ-2 sensor and sends this data periodically to a Firebase Realtime Database.

When dangerous gas levels are detected (above a configurable threshold — 300 in this project), the system triggers an audible alarm using a connected buzzer and sends an immediate alert email via IFTTT Webhooks integration.

A web-based frontend fetches data from Firebase and visualizes it using a graph, with gas/smoke values on the Y-axis and timestamps (converted from UNIX time) on the X-axis, displayed at regular 3-minute intervals.

🧩 Components

• ESP32 development board
• MQ-2 Smoke/Combustible Gas sensor
• Active buzzer
• Jumpers / wires