🛠️ Safe Kitchen: Smart Kitchen Alarm System (IoT-Based)

📘 Overview

Safe Kitchen is an IoT-based project designed to prevent gas leaks and fires in household kitchens. It integrates gas, flame, and temperature sensors with real-time monitoring via Node-RED and Ubidots, alerts through SMS using Vonage, and local data storage on a Raspberry Pi.

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🔥 Why This Project?

Kitchen-related incidents remain a major cause of house fires and fatalities worldwide. Many of these are preventable with early detection systems. Common causes include:

• Leaving food unattended on stoves.
• Forgetting burners or ovens on.
• Using loose clothing near heat sources.
• Placing flammable objects near heat.

Despite warnings, accidents continue to rise. This project aims to build a smart, user-friendly, and low-cost system that detects early warning signs and alerts residents and emergency services promptly.

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🎯 Project Objectives

General Objective:

Develop a smart alarm system to prevent kitchen accidents caused by gas leaks and fire hazards.

Specific Objectives:

• 🔍 Detect environmental changes in the kitchen using gas, flame, and temperature sensors.
• 📊 Display sensor data via a local dashboard and cloud platform (Node-RED and Ubidots).
• 🚨 Trigger alarms and send SMS notifications in case of gas or fire detection.
• ☁️ Enable cloud connectivity and mobile access for users.
• 💡 Maintain a low-cost and user-friendly design.

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🧩 System Architecture

The system consists of the following components:

• ESP32 microcontroller for sensor data acquisition.
• Raspberry Pi for data processing and dashboard control via Node-RED.
• Sensors: gas, flame, temperature.
• Cloud integration using MQTT and Ubidots.
• Local storage using SQLite and CSV export.
• SMS alerts via Vonage API.

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📦 Block Diagram

[ Gas Sensor ]             [ Flame Sensor ]            [ Temp Sensor ]
       \                         |                            /
        \                        |                           /
         \                       |                          /
                         [ ESP32 Microcontroller ]
                                |
                        [ Wi-Fi / MQTT Protocol ]
                                |
         -------------------------------------------------
        |                   |                           |
[ Raspberry Pi ]    [ Ubidots Cloud ]          [ Vonage SMS Alerts ]
        |
[ SQLite + CSV Storage ]

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📷 Example Screenshots:

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Node-RED UI with real-time data

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Ubidots cloud dashboard

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SQLite database

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SMS alert confirming fire/gas detection

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Implementation.mp4

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🧠 Conclusions

The proposed system was successfully designed and built with a web socket interface and Wi-Fi communication.

Sensor integration and MQTT communication were validated.

The system shows promise for low-cost domestic safety solutions.

Future improvements may include:

• Direct ESP32-to-Ubidots MQTT integration.

• Evaluation of alternative microcontrollers and protocols.

• Testing additional sensors for accuracy and cost-efficiency.

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👥 Team Members:

• Josh Lopez