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🌿 ESP32-Based Air Quality Monitoring Station 🌿

An IoT project for monitoring temperature, humidity, and air quality with a user-friendly interface, RGB indication, and control via a Telegram bot. 🎉

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📋 Description

This air quality monitoring station measures:

• 🌡️ Temperature (sensors DS18B20 and SHT21)
• 💧 Humidity (sensor SHT21)
• 🌫️ Particle concentration PM1.0, PM2.5, PM10 (sensor PMS5003)

📊 Acquired Data:

• Displayed on an OLED SSD1306 display 📺
• Indicated using an RGB LED 💡
• Sent to the ThingSpeak platform 🌐
• Accessible via a Telegram bot 🤖

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🛠 Used Technologies

Technology	Description
ESP32	Main controller of the project
Arduino IDE	Development environment for programming the ESP32
ThingSpeak	Platform for data analysis and storage
Telegram Bot	Device management and data retrieval
OLED Display	Displays temperature, humidity, and air quality data

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🎥 Device Demonstration

🚦 Air Quality Color Indication

🌈 Air quality indication via LED:

• 🟢 Green: Low pollution level (PM2.5 ≤ 12)
• 🔵 Blue: Medium pollution level (12 < PM2.5 ≤ 35)
• 🔴 Red: High pollution level (PM2.5 > 35)

Pollution Level	Indicator Color	GIF
Low	🟢 Green
Medium	🔵 Blue
High	🔴 Red

📟 Example of Data Display on the OLED Screen

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🏠 3D-Printed Enclosure

To securely house and protect all components, you can use a 3D-printed enclosure, available at the following link:
3D-Printed Enclosure on Thingiverse

Key benefits of using this enclosure:

• Reliable protection for sensors and the ESP32 board from external factors.
• Easy access to the OLED display, connectors, and LED.
• Customizable design: modify and reprint the enclosure as needed.

⚙️ Components

• 🪣 ESP32 DevKit
• 🌡️ DS18B20 temperature sensor
• 🌡️ SHT21 temperature and humidity sensor
• 🌫️ PMS5003 air quality sensor
• 📺 OLED SSD1306 display
• 💡 RGB LED
• 🔗 Resistors, wires, and other components

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🚀 Installation and Setup

1. Hardware Preparation

Assemble the circuit according to the code and schematics. Ensure all connections are secure.

2. Software Preparation

• Clone the repository:

  git clone https://github.com/CyberScopeToday/ESP32-AirQuality-Station.git

• Install Arduino IDE and the necessary libraries (see below).

3. Configuration Setup

Installing Libraries

Ensure the following libraries are installed in the Arduino IDE:

• WiFi.h
• Wire.h
• Adafruit GFX Library
• Adafruit SSD1306
• OneWire
• DallasTemperature
• HTTPClient
• SHT21
• WiFiClientSecure
• UniversalTelegramBot
• ArduinoJson
• Preferences

Configuring config.h

Create a file named config.h:

#define WIFI_SSID "your_wifi_ssid"
#define WIFI_PASSWORD "your_wifi_password"
#define THINGSPEAK_API_KEY "your_thingspeak_api_key"
#define TELEGRAM_TOKEN "your_telegram_bot_token"
#define TELEGRAM_CHAT_ID "your_telegram_chat_id"

Replace the placeholder values with your actual credentials:

• your_wifi_ssid — Your Wi-Fi network name
• your_wifi_password — Your Wi-Fi password
• your_thingspeak_api_key — Your ThingSpeak channel API key
• your_telegram_bot_token — Your Telegram bot token
• your_telegram_chat_id — Your Telegram chat ID

4. Uploading the Sketch

1. Connect the ESP32 via USB.
2. In Arduino IDE, select the ESP32 DevKit board.
3. Upload the code to the device.

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📱 Telegram Bot Commands

Command	Description
/start	Welcome message and help
/status	Retrieve current data from the device
/setapikey <api_key>	Set a new ThingSpeak API key
/setinterval <seconds>	Set data sending interval (minimum 300 seconds)
/setthreshold <low> <medium>	Set PM2.5 threshold values
/getsettings	View current settings
/toggledebug	Enable/disable debug information on the OLED display

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📸 Device Photos

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📈 Data Visualization on ThingSpeak

All data collected by the ESP32 Air Quality Monitoring Station is sent to ThingSpeak, a cloud-based platform for IoT data visualization and analysis.

🌟 Live Dashboard Example

Explore a real-time example of air quality data visualization on ThingSpeak:
ThingSpeak Channel - Air Quality Monitor

📊 Charts Available:

• 🌡️ Temperature: Visualize ambient temperature from DS18B20 and SHT21 sensors.
• 💧 Humidity: Monitor real-time humidity levels measured by the SHT21 sensor.
• 🌫️ Particulate Matter (PM): Track air quality with PM1.0, PM2.5, and PM10 data from PMS5003:
  • PM1.0: Fine particles, diameter ≤ 1.0 µm
  • PM2.5: Particles, diameter ≤ 2.5 µm
  • PM10: Coarse particles, diameter ≤ 10 µm

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🔗 How to Access

1. Open the ThingSpeak Channel.
2. Use the charts to view real-time air quality data updated every 5 minutes.
3. Analyze trends, download datasets, or integrate the data into your own applications using ThingSpeak's API.

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📄 License

This project is licensed under the MIT License. See LICENSE for details.

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🎯 Useful Links

• 📕 ESP32 Documentation
• 🌐 ThingSpeak API
• 🤖 Creating a Telegram Bot

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