AI-Based Air Quality Index Monitoring and Suggestion System

The solution involves developing a hardware device using the Sipeed Maixduino board, equipped with sensors to read pollutant values (such as PM2.5, PM10, O3, CO, etc.). These readings are processed by an onboard MLP (Multi-Layer Perceptron) neural network model, which has been pre-trained to predict the AQI index from the pollutant concentrations. Based on the AQI range, the system provides real-time health suggestions displayed directly on the hardware’s screen. This portable, user-friendly setup enables immediate, actionable feedback, enhancing public awareness and promoting proactive health measures regarding air quality. Learn by building real applications through these curated AI projects and tutorials for students and engineers.

To see the full demonstration video, click on the YouTube Video below.

1. LCD (16x2 I2C Display)

Working : This LCD uses the I2C communication protocol, which simplifies wiring by using only two data pins (SDA and SCL) to transmit data. It displays characters and numbers in two rows of sixteen columns.

Working : This LCD uses the I2C communication protocol, which simplifies wiring by using only two data pins (SDA and SCL) to transmit data. It displays characters and numbers in two rows of sixteen columns.

Need : The LCD displays real-time AQI values and predictions. It provides a user-friendly way to view sensor data and AQI category information directly from the device.

Need : The LCD displays real-time AQI values and predictions. It provides a user-friendly way to view sensor data and AQI category information directly from the device.

2. MQ Sensors (Analog Gas Sensors)

Working : The MQ-7 sensor detects carbon monoxide (CO) in the air. It outputs an analog signal corresponding to the concentration of CO gas.

Working : The MQ-7 sensor detects carbon monoxide (CO) in the air. It outputs an analog signal corresponding to the concentration of CO gas.

Need : CO levels are a crucial part of air quality assessment. Monitoring CO helps detect harmful levels of pollution, particularly in indoor and urban environments.

Need : CO levels are a crucial part of air quality assessment. Monitoring CO helps detect harmful levels of pollution, particularly in indoor and urban environments.

MQ-135 (Air Quality Sensor) :

Working : The MQ-135 measures air quality by detecting gases like NH3, NOx, alcohol, benzene, smoke, and CO2. It outputs an analog signal proportional to the gas concentration.

Working : The MQ-135 measures air quality by detecting gases like NH3, NOx, alcohol, benzene, smoke, and CO2. It outputs an analog signal proportional to the gas concentration.

Need : As a versatile air quality sensor, the MQ-135 helps in gauging general pollution levels, essential for estimating the overall AQI.

Need : As a versatile air quality sensor, the MQ-135 helps in gauging general pollution levels, essential for estimating the overall AQI.

MQ-136 (H2S Sensor) :

Working : The MQ-136 detects hydrogen sulfide (H2S) gas, outputting an analog signal related to its concentration.

Working : The MQ-136 detects hydrogen sulfide (H2S) gas, outputting an analog signal related to its concentration.

Need : H2S is a toxic gas often found near industrial areas. Monitoring it helps provide a more comprehensive air quality analysis.

Need : H2S is a toxic gas often found near industrial areas. Monitoring it helps provide a more comprehensive air quality analysis.

MQ-4 (Methane Sensor) :

Working : The MQ-4 detects methane (CH4) gas. It produces an analog signal based on the concentration of methane in the air.

Working : The MQ-4 detects methane (CH4) gas. It produces an analog signal based on the concentration of methane in the air.

Need : Methane is a flammable gas and a contributor to the greenhouse effect. Monitoring its levels is important in both air quality assessment and safety.

Need : Methane is a flammable gas and a contributor to the greenhouse effect. Monitoring its levels is important in both air quality assessment and safety.

MQ-131 (Ozone Sensor) :

Working : The MQ-131 sensor detects ozone (O3) gas, providing an analog output proportional to the concentration.

Working : The MQ-131 sensor detects ozone (O3) gas, providing an analog output proportional to the concentration.

Need : Ozone levels are important for AQI, as high ground-level ozone can cause respiratory issues and harm vegetation.

Need : Ozone levels are important for AQI, as high ground-level ozone can cause respiratory issues and harm vegetation.

3. Nova PM Sensor (PMS5003)

Working : The PMS5003 measures particulate matter (PM) levels, specifically PM2.5 and PM10. It uses laser scattering to detect particle concentration in the air and communicates data via UART (TX/RX pins).

Working : The PMS5003 measures particulate matter (PM) levels, specifically PM2.5 and PM10. It uses laser scattering to detect particle concentration in the air and communicates data via UART (TX/RX pins).

Need : Particulate matter (PM) is a primary factor in calculating AQI. PM2.5 and PM10, in particular, are important indicators of air pollution, as these fine particles can penetrate the respiratory system and impact health.

Need : Particulate matter (PM) is a primary factor in calculating AQI. PM2.5 and PM10, in particular, are important indicators of air pollution, as these fine particles can penetrate the respiratory system and impact health.

3. CIRCUIT CONNECTION

LCD (16x2 I2C Display) :

Connect the SDA pin to (SDA) on the Maixduino.

Connect the SDA pin to (SDA) on the Maixduino.

Connect the SCL pin to (SCL) on the Maixduino.

Connect the SCL pin to (SCL) on the Maixduino.

Connect GND to GND.

Connect GND to GND.

MQ Sensors (Analog Sensors) :

Connect the MQ-7 (CO Sensor) to A0 (IO33) on the Maixduino.

Connect the MQ-7 (CO Sensor) to A0 (IO33) on the Maixduino.

Connect the MQ-135 (Air Quality Sensor) to A1 (IO32) on the Maixduino.

Connect the MQ-135 (Air Quality Sensor) to A1 (IO32) on the Maixduino.

Connect the MQ-136 (H2S Sensor) to A2 (IO35) on the Maixduino.

Connect the MQ-136 (H2S Sensor) to A2 (IO35) on the Maixduino.

Connect the MQ-4 (Methane Sensor) to A3 (IO34) on the Maixduino.

Connect the MQ-4 (Methane Sensor) to A3 (IO34) on the Maixduino.

Connect the MQ-131 (Ozone Sensor) to A4 (IO39) on the Maixduino.

Connect the MQ-131 (Ozone Sensor) to A4 (IO39) on the Maixduino.

For each MQ sensor, connect VCC to 5V and GND to GND on the Maixduino.

For each MQ sensor, connect VCC to 5V and GND to GND on the Maixduino.

Nova PM Sensor (PMS5003) :

Connect the TX pin of the PMS5003 to IO5 (TX1) on the Maixduino.