Air Quality Monitoring Device with STM32F407 Discovery Board

Air Quality Monitoring Device with STM32F407 Discovery Board and ESP8266

The Air Quality Monitoring Device I have developed utilizes the STM32F407 Discovery Board and ESP8266 to measure and track various environmental parameters such as temperature, humidity, PM2.5, PM1.0, and ENS160 air quality sensor. The collected data is then sent to a web page, enabling users to monitor the air quality in real-time. In this text, I will provide a detailed description of the system's components, functionality, and implementation.

1. STM32F407 Discovery Board: This development board is equipped with the powerful STM32F407 microcontroller, offering a wide range of features and interfaces for rapid prototyping.

2. ESP8266: A versatile Wi-Fi module that allows wireless communication between the STM32F407 board and the internet.

3. Air Quality Sensors:

• Temperature and Humidity Sensor: Measures ambient temperature and relative humidity, providing insights into the thermal comfort level.
• PM2.5 and PM1.0 Sensors: Detects and quantifies fine particulate matter in the air, contributing to air pollution monitoring.
• ENS160 Air Quality Sensor: Provides comprehensive air quality information, including VOC (volatile organic compounds), CO2, and equivalent CO2 levels.

Functionality:

1. Sensor Data Acquisition: The STM32F407 board interfaces with the air quality sensors to gather data on temperature, humidity, PM2.5, PM1.0, and ENS160 air quality parameters. The microcontroller communicates with the sensors using appropriate protocols such as I2C or UART.

2. Data Processing: The acquired sensor data is processed and formatted for transmission. This involves converting analog sensor readings to digital values, applying calibration factors, and performing necessary calculations.

3. Wi-Fi Communication: The ESP8266 module establishes a Wi-Fi connection to a local network or hotspot. It uses WEBSERVER protocols to transmit the processed sensor data to a web server.

4. Web Server Integration: The device interacts with a web server, where the received sensor data is stored and displayed on a dedicated web page. Users can access this web page from any device with an internet connection to monitor the air quality parameters in real-time.

5. User Interface: The web page offers a user-friendly interface, presenting the air quality readings in a visually appealing manner. It may include graphs, and color-coded indicators to provide intuitive information about the current air quality status.

6. Alert System: What to do in the future The system can be configured to trigger alerts or notifications when the air quality reaches predefined thresholds. These alerts can be sent via email, SMS, or other messaging services to inform users of potential air pollution hazards.

The implementation of this air quality monitoring device involves programming the STM32F407 microcontroller using an appropriate development environment (e.g., Keil, STM32CubeIDE). The firmware includes sensor drivers, Wi-Fi communication protocols, and data processing algorithms. The ESP8266 module is also programmed to establish a Wi-Fi connection and handle data transmission using the chosen protocol. On the web server side, a backend application receives the sensor data and stores it in a database. A frontend web page is designed to visualize the data and provide real-time monitoring capabilities

The combination of STM32F407 Discovery Board, ESP8266 module, and air quality sensors creates an effective air quality monitoring device. This system enables users to continuously track important environmental parameters and receive real-time information about air quality through a user-friendly web interface. By leveraging the power of IoT and web technologies, this device contributes to raising awareness about air pollution and promoting healthier living environments.