🌱 ESP32 Environmental Monitoring Projects

Welcome! This repository contains a collection of ESP32-based projects for capturing, displaying, logging, and serving environmental data such as temperature, humidity, and noise levels. All projects are modular, well-documented, and use widely available sensors and displays, making them ideal for learning, prototyping, or real-world IoT applications.

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✨ Features

• Real-time measurement of temperature, humidity, and noise
• OLED display visualization
• Data logging in JSON format
• Web server and API for remote data access
• Visual feedback with LEDs (in some projects)
• Modular and easy-to-understand code

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🧩 Project Variants

🔊 Noise Level Meter

• Sensors: INMP441 (noise)
• Display: SSD1306 OLED
• Features: Real-time noise level measurement and display
• Example Output:

  Ruido:
    42%
  

🌡️🔊📡 Environmental Logger & Simple API

• Sensors: SHT31 (temperature/humidity), INMP441 (noise)
• Features: Logs data in JSON, provides a PHP API, LED status
• Example Output (log.json):

  [
    {
      "temperature": 23.45,
      "humidity": 45.67,
      "noise": 56.23,
      "timestamp": "17-09-25 09:20:15"
    }
  ]

🌡️🔊 Environmental Monitor with OLED

• Sensors: SHT31, INMP441
• Display: SSD1306 OLED
• Features: Alternates display of temperature/humidity and noise (dB)
• Example Output:

  Temp: 23.4°C
  Umid: 45.7 %
  ---
  Ruido:
    56.2 dB
  

🌱 Environmental Variable Capture

• Sensors: SHT31
• Display: SSD1306 OLED
• Features: Displays temperature and humidity
• Example Output:

  Temp: 
  23.4°C
  Umid: 
  45.7 %
  

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⚡ Common Wiring

Sensor/Display	ESP32 Pinout Example
SHT31 SDA	GPIO 21
SHT31 SCL	GPIO 22
INMP441 WS	GPIO 15
INMP441 SCK	GPIO 14
INMP441 SD	GPIO 32
OLED SDA	GPIO 21
OLED SCL	GPIO 22

Note: Always confirm the pinout for your ESP32 board and sensor/display versions.

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🚀 How to Use

1. Install the required libraries in the Arduino IDE:
   • Adafruit SHT31
   • Adafruit SSD1306
   • Adafruit GFX
   • Wire
   • WiFi, SPIFFS, WebServer (for logging/web projects)
2. Connect the sensors and display as shown above.
3. Open the desired .ino file in Arduino IDE, edit WiFi credentials if needed.
4. Upload to your ESP32.
5. Use the Serial Monitor and/or OLED display to view live data. For web/API projects, access the ESP32 IP or PHP endpoint.

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🤝 Contributing

Feel free to open issues and pull requests to improve this project!

⚖️ License

This project is licensed under the MIT License.

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Developed by Giordano Berwig