This project implements an air quality monitoring and fan control system using two microcontrollers: LPC1769 and STM32. The system enables real-time simulation and management of air quality conditions with advanced features such as airflow monitoring, Air Quality Index (AQI) calculation, and dynamic fan speed control.
The system is designed to integrate hardware and software seamlessly, leveraging:
- LPC1769 for fan control, AQI calculation, and filter condition visualization using LEDs.
- STM32 for simulating the PSM5003 sensor and generating realistic air quality data.
This modular approach ensures scalability and simplifies future integrations, such as real sensors or enhanced communication protocols.
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Airflow Monitoring:
- Detects blockages in the air filter by analyzing airflow rate.
- Adjusts the brightness of a DAC-connected LED to indicate the filter's condition.
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Fan Control (PWM):
- Dynamically adjusts fan speed based on the AQI.
- Enhances air purification efficiency.
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UART Communication:
- Receives simulated data from the STM32.
- Implements checksum verification to ensure data integrity.
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AQI Calculation:
- Converts PM2.5 concentrations into AQI values to control the fan.
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PSM5003 Sensor Simulation:
- Generates a 32-byte data frame with adjustable PM2.5 values.
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PM2.5 Control with Potentiometer:
- Manually adjusts simulated concentrations (0-300 µg/m³).
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FreeRTOS:
- Leverages tasks to simulate sensor functionality and ensure efficient operations.
- Implements High-Water Mark for stack usage monitoring.
.
├── src/
│ ├── LPC1769/ # Code for LPC1769 microcontroller
│ ├── STM32/ # Code for STM32 microcontroller
├── docs/
│ ├── INSTALL.md # Installation guide
│ ├── Doxygen/ # Automatically generated documentation
├── tests/
│ ├── manual/ # Manual tests performed
└── README.md # This file
For detailed installation instructions, refer to the INSTALL.md file in the docs/ directory.
For a detailed demonstration of the project, watch the following video: