Key Learning Outcomes:

1. Basic Arduino IDE Setup:

   • You learned how to set up the Arduino IDE for programming an ESP32, including installing board definitions and necessary libraries.
   • By writing, compiling, and uploading code, you gained hands-on experience with one of the most common microcontroller environments.

2. Using the DHT22 Sensor:

   • We explored how to interface the DHT22 sensor with the ESP32 to measure temperature and humidity.
   • You used the DHT library to retrieve real-time sensor data and handled potential errors when sensor readings failed.

3. OLED Display with Adafruit Libraries:

   • The OLED screen was integrated into the project using the Adafruit_SSD1306 and Adafruit_GFX libraries.
   • You learned to display text, format output, and update the screen with real-time temperature and humidity readings.

4. Adding WiFi Capabilities:

   • You integrated Wi-Fi into the project using the WiFiManager library, making the ESP32 a powerful IoT device.
   • The WiFiManager allowed for easy configuration of network credentials, making the device portable and adaptable to different networks without hardcoding the credentials.

5. Creating a Simple Web Interface:

   • The web server functionality was implemented using the ESPAsyncWebServer library.
   • This allowed the ESP32 to host a web interface that displays live temperature and humidity data, demonstrating the basics of IoT and real-time data monitoring over Wi-Fi.

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Reflection:

This project helped you cover many fundamental aspects of embedded systems, including hardware setup, programming basics, and leveraging the power of the ESP32’s built-in Wi-Fi. By combining these components, you created a versatile, real-world IoT device.

You now have a deeper understanding of how to:

• Interface sensors with microcontrollers
• Use libraries to simplify code
• Connect microcontrollers to Wi-Fi networks
• Serve web interfaces from the ESP32 for remote monitoring

Next Steps and Ideas for Expansion:

Now that you’ve mastered the basics, you can take this project further by:

• Adding more sensors: Extend functionality by adding other sensors like motion sensors, light sensors, or gas sensors.
• Data Logging: Integrate data logging to store temperature and humidity data on an SD card or send it to a cloud service like Google Sheets or an IoT platform (e.g., ThingsBoard, Blynk).
• Mobile App Interface: Use an app like Blynk to create a mobile interface to display your sensor data in real-time on your smartphone.
• Home Automation: Use the temperature and humidity data to trigger relays for fans, heaters, or humidifiers, creating a basic home automation system.