Baby Monitor Dashboard

A comprehensive baby monitoring system using ESP8266 microcontrollers and temperature sensors. This project provides real-time temperature monitoring, data visualization, and remote management capabilities.

Features

• Real-time Temperature Monitoring

  • Support for DHT22 and DS18B20 temperature sensors
  • Multiple sensor locations (nursery, living room, bedroom)
  • Temperature range monitoring and alerts
  • Historical data tracking

• Web Dashboard

  • Real-time temperature visualization using Chart.js
  • WebSocket-based live updates
  • Responsive design with Bootstrap 5
  • Dark/light theme support
  • Interactive charts and graphs

• Power Management

  • Deep sleep mode for energy efficiency
  • Configurable update intervals
  • Battery level monitoring
  • Power-saving LED indicators

• Security Features

  • Device authentication
  • Secure WebSocket connections
  • Rate limiting
  • Input validation
  • Helmet.js security headers

• Data Management

  • MySQL database storage
  • Automatic data retention
  • Data visualization
  • Export capabilities

Hardware Requirements

Required Components

• ESP8266 microcontroller (NodeMCU or similar)
• DHT22 or DS18B20 temperature sensor
• LED indicators (3x)
  • Green: Normal operation
  • Yellow: Warning/Processing
  • Red: Error/Alert
• Power supply (USB or battery)
• Jumper wires
• Breadboard (optional)

Optional Components

• Battery pack for portable operation
• Enclosure for protection
• External antenna for better WiFi range

Wiring Diagram

DHT22 Sensor

ESP8266    DHT22
3.3V   --> VCC
GND    --> GND
D4     --> DATA

DS18B20 Sensor

ESP8266    DS18B20
3.3V   --> VCC
GND    --> GND
D4     --> DATA

LED Indicators

ESP8266    LED
3.3V   --> Green LED (through 220Ω resistor)
D5     --> Yellow LED (through 220Ω resistor)
D6     --> Red LED (through 220Ω resistor)

Software Setup

Prerequisites

• Node.js (v14 or higher)
• MySQL Server (v5.7 or higher)
• Arduino IDE
• Required Arduino libraries:
  • ESP8266WiFi
  • DHT sensor library
  • OneWire
  • DallasTemperature
  • ESP8266HTTPClient
  • ArduinoJson

Installation

1. Clone the repository:

git clone https://github.com/yourusername/baby-monitor.git
cd baby-monitor

2. Install Node.js dependencies:

npm install

3. Set up the database:

mysql -u root -p < MySQL\ Deploy

4. Configure environment variables: Create a .env file in the project root:

PORT=3000
DB_HOST=localhost
DB_USER=your_username
DB_PASSWORD=your_password
DB_NAME=BabyMonitor
NODE_ENV=development

5. Start the server:

npm start

Arduino Setup

1. Open the appropriate sketch in Arduino IDE:

   • ESP8266 - DHT22 Sketch for DHT22 sensors
   • ESP8266 - DS18B20 Sketch for DS18B20 sensors

2. Install required libraries through Arduino IDE Library Manager

3. Configure WiFi and server settings in the sketch:

const char* ssid = "YOUR_WIFI_SSID";
const char* password = "YOUR_WIFI_PASSWORD";
const char* serverUrl = "http://your-server:3000";

4. Upload the sketch to your ESP8266

LED Status Indicators

• Green LED

  • Solid: Normal operation
  • Blinking: Data transmission
  • Off: Deep sleep

• Yellow LED

  • Solid: Processing
  • Blinking: Warning
  • Off: Normal state

• Red LED

  • Solid: Error
  • Blinking: Critical error
  • Off: Normal state

Power Management

The system uses deep sleep mode to conserve power:

• Wake up every 5 minutes (configurable)
• Read temperature data
• Transmit data to server
• Return to deep sleep

Security Features

• Device authentication using unique keys
• Secure WebSocket connections
• Rate limiting on API endpoints
• Input validation and sanitization
• Security headers with Helmet.js
• CORS protection
• Error logging and monitoring

Troubleshooting

Common Issues

1. WiFi Connection Issues

   • Check WiFi credentials
   • Verify signal strength
   • Check router settings

2. Sensor Reading Errors

   • Verify wiring
   • Check sensor power supply
   • Verify sensor type configuration

3. Database Connection Issues

   • Check database credentials
   • Verify MySQL service is running
   • Check network connectivity

4. WebSocket Connection Issues

   • Check server status
   • Verify firewall settings
   • Check browser console for errors

Debug Mode

Enable debug mode by setting DEBUG_MODE to true in the sketch:

#define DEBUG_MODE true

Maintenance

Data Retention

• Sensor readings: 30 days
• System events: 90 days
• Automatic cleanup via MySQL events

Device Status

• Automatic status updates
• Inactive device detection after 24 hours
• Status synchronization with sensors

Contributing

1. Fork the repository
2. Create a feature branch
3. Commit your changes
4. Push to the branch
5. Create a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• ESP8266 community for hardware support
• Chart.js for data visualization
• Bootstrap for UI components
• All contributors and maintainers