Smart IoT-Based Environmental Automation with Real-Time PID Monitoring and Control

<h3>📌 Project Overview</h3>

This project presents the design and implementation of an advanced PID-based temperature and humidity regulation system using the <b>STM32 Black Pill</b> and <b>ESP32</b> microcontrollers with <b>Blynk IoT integration</b>. The system is capable of performing accurate environmental monitoring and automatic climate control for industrial and agricultural applications.

The proposed system continuously measures temperature and humidity conditions using the <b>DHT11</b> sensor and monitors high-temperature levels through the <b>MAX6675 thermocouple module</b>. A PID control algorithm is implemented to maintain stable environmental conditions by automatically controlling a <b>DC cooling fan</b> and <b>mist maker</b>.

<h3>⚙️ Hardware Components</h3> <ul> <li>STM32 Black Pill Microcontroller</li> <li>ESP32 WiFi Module</li> <li>DHT11 Temperature & Humidity Sensor</li> <li>MAX6675 Thermocouple Module</li> <li>OLED Display</li> <li>Relay Module</li> <li>DC Cooling Fan</li> <li>Mist Maker Module</li> <li>Motor Driver Module</li> <li>Buck Converter Board</li> <li>SMPS Power Supply</li> </ul>

<h3>🚀 System Features</h3> <ul> <li>PID-Based Temperature and Humidity Control</li> <li>Real-Time Environmental Monitoring</li> <li>Blynk IoT Wireless Monitoring and Control</li> <li>Automatic Fan Speed Regulation</li> <li>Automatic Mist Generation Control</li> <li>OLED-Based Live Data Display</li> <li>Remote Setpoint Adjustment via Mobile App</li> <li>Energy Efficient Operation</li> <li>Compact and Reliable Embedded Design</li> </ul>

<h3>📱 IoT Integration</h3> <p> The ESP32 microcontroller enables wireless communication with the Blynk IoT platform, allowing users to remotely monitor temperature, humidity, fan status, and mist maker operation through a smartphone. Users can also modify PID setpoints and monitor real-time system performance from anywhere. </p>

<h3>🎯 Applications</h3> <ul> <li>Smart Greenhouse Automation</li> <li>Mushroom Cultivation Systems</li> <li>Industrial Environmental Monitoring</li> <li>Laboratory Climate Control</li> <li>Food Storage Monitoring</li> <li>Incubation Systems</li> <li>Server Room Cooling Systems</li> </ul>

<h3>💡 Advantages</h3> <ul> <li>High Accuracy Environmental Regulation</li> <li>Reduced Overshoot Using PID Algorithm</li> <li>Low Power Consumption</li> <li>Wireless IoT Accessibility</li> <li>Industrial and Research-Oriented Design</li> <li>Scalable for Future AI and Cloud Integration</li> </ul>

<h3>🛠️ Software Used</h3> <ul> <li>Arduino IDE</li> <li>STM32CubeIDE</li> <li>Blynk IoT Platform</li> <li>Embedded C Programming</li> </ul>

<h3>🔬 Future Enhancements</h3> <ul> <li>Firebase Cloud Integration</li> <li>AI-Based Predictive Climate Control</li> <li>Data Logging and Analytics Dashboard</li> <li>Email and SMS Alert System</li> <li>Web-Based Monitoring Interface</li> </ul>