🌡️ Sensor Hub with ESP-NOW Remote Control

A comprehensive sensor monitoring system built with MicroPython on ESP32, featuring real-time environmental monitoring and remote control capabilities via ESP-NOW.

✨ Features

Environmental Monitoring

• Temperature, Humidity, and Pressure (BMP280)
• Air Quality (MQ135)
• Flame Detection
• Color Detection (TCS3200)
• Heart Rate Monitoring (MAX30102)

Wireless Communication

• ESP-NOW for low-latency remote control
• Wi-Fi for data logging to Firebase
• Automatic switching between ESP-NOW and Wi-Fi modes

Remote Control

• Custom ESP-NOW remote with button controls
• On-demand heart rate monitoring
• On-demand color detection
• Real-time sensor data updates

🔧 Hardware Requirements

Main Components

• ESP32 Development Board
• BMP280 Temperature/Pressure Sensor
• MQ135 Air Quality Sensor
• MAX30102 Heart Rate Sensor
• TCS3200 Color Sensor
• Flame Sensor
• DHT11 Temperature/Humidity Sensor
• Neopixel LED (for status indication)
• Custom ESP-NOW Remote Controller

Pin Connections

Component	ESP32 Pin	Description
MAX30102 (Heart Rate)	SDA: GPIO14 SCL: GPIO15	I2C Communication
BMP280	SDA: GPIO20 SCL: GPIO19	I2C Communication
DHT11	GPIO18	Digital Input
MQ135 (Air Quality)	GPIO0	ADC Input
Flame Sensor	GPIO1	ADC Input
TCS3200 (Color)	S2: GPIO4 S3: GPIO5 OUT: GPIO3	Digital I/O
Neopixel LED	GPIO8	Digital Output

💻 Software Requirements

• MicroPython
• Required Libraries:
  • network
  • espnow
  • machine
  • dht
  • max30102
  • bmp280
  • neopixel
  • urequests

🚀 Setup Instructions

1. Flash MicroPython to your ESP32 board
2. Install required libraries
3. Configure Wi-Fi credentials in sensorHub.py:

   SSID = "your_wifi_ssid"
   PASSWORD = "your_wifi_password"
   FIREBASE_URL = "your_firebase_url"

4. Upload the code to your ESP32
5. Power up the custom ESP-NOW remote

📱 Usage

Automatic Data Collection

• The system automatically collects sensor data every 60 seconds
• Data is transmitted to Firebase for storage and analysis

Remote Control Functions

• Button 2: Trigger heart rate measurement
• Button 3: Trigger color detection

Status LED Indicators

Color	Meaning
⚪ White	System ready
🔴 Red	Heart rate measurement in progress
🟢 Green	Color detection in progress
🟣 Purple	Data transmission to Firebase
🟡 Yellow	Firebase transmission complete

📊 Data Collection

Sensor data is collected and transmitted to Firebase at regular intervals, including:

• Air quality metrics (CO2, NH3, NOx, etc.)
• Temperature and humidity readings
• Pressure measurements
• Flame detection status
• Heart rate (when measured)
• Color detection (when measured)

🔍 Troubleshooting

Sensor Reading Issues

• Check sensor connections
• Verify power supply
• Ensure proper I2C addressing

ESP-NOW Communication Problems

• Verify remote is powered
• Check distance between devices
• Ensure both devices are in ESP-NOW mode

Firebase Upload Failures

• Verify Wi-Fi credentials
• Check Firebase URL
• Ensure internet connectivity

📜 License

This project is open-source and available under the MIT License.

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.