An IoT-based fire safety system integrating real-time fire and gas detection with automated suppression and email alerts. Built using Arduino (ATmega328P), ESP8266 Wi-Fi module, flame & gas sensors, relay-controlled pump and a piezo buzzer.

• 🔍 Dual-Sensor Fire Detection (IR Flame + MQ-2 Gas Sensor)

• 🚨 Immediate Local Alert via Buzzer

• 💧 Automatic Fire Suppression using Relay-Controlled Water Pump

• 📧 Email Notifications through ESP8266 using Gmail SMTP

• 🔁 False Positive Mitigation via sensor re-verification logic

• 🧪 Tested Response Time:

  • Detection: < 5 seconds
  • Email Alert: < 10 seconds

Smart-Fire-Extinguisher/
├── fire_detection.ino          # ATmega328P Firmware
├── email_notification.ino      # ESP8266 Firmware
├── Smart_Fire_Extinguisher_Project_Report.pdf
├── README.md                   # You're here!

• Arduino IDE

• ESP8266 Board Package

• Libraries:

  • ESP8266WiFi.h
  • ESP_Mail_Client.h

If you are using a board with built-in ESP8266 (like Arduino UNO WiFi R3), DIP switches are onboard. If you are using separate arduino and esp8266 modules you can skip that step. Only make sure TX/RX connections are properly made.

• Important: Press the reset button after setting the switches.

1. Set DIP Switches: Mode 1 (SW3, SW4 ON)
2. Select board: Arduino UNO
3. Upload the code

1. Set DIP Switches: Mode 2 (SW5, SW6, SW7 ON)
2. Select board: Generic ESP8266 Module or compatible
3. Upload code with Wi-Fi and Gmail credentials

After uploading code to both ATmega328P and ESP8266:

• Set the board to Normal Operation Mode:
  • Turn ON: SW1, SW2, SW5, SW6
• This enables:
  • Serial communication from ATmega328P to ESP8266
  • Email alerts on fire/gas detection

If using separate ESP8266 module: ensure TX/RX are cross-connected (TX → RX, RX → TX)

1. Sensors continuously monitor environment.

2. On detection of flame or smoke:

   • Buzzer activates
   • Relay turns on water pump
   • ESP8266 receives alert over serial
   • Sends an emergency email to the recipient

3. System resets once environment is safe.

Subject: URGENT: Fire/Gas Detected! Message: 🚨 EMERGENCY ALERT 🚨 Flame or dangerous gas detected! Immediate action required.

📹 Watch full system demo on OneDrive

Please refer to the Smart_Fire_Extinguisher_Project_Report.pdf file for detailed explanation, schematics, testing, and references.

Pull requests are welcome! For major changes, please open an issue first to discuss what you would like to change.