u/Alive_Acadia4581

The system monitors AQI, UV, temperature, noise, and user activity in real time, then combines them into a single Exposure Score out of 100. Instead of giving alerts based only on instant values, I’m trying a time-based exposure model where longer exposure increases risk faster.

Example:

• High AQI for 2–3 mins , small score increase
• High AQI for 20–30 mins , much faster increase

I also used an accelerometer because I thought physical activity should affect exposure (more movement = potentially more inhalation). If the exposure score crosses 80+, an LED blinks and a alert message is sent to the user’s phone.

Currently using:

• ESP32
• MQ135(i know it isn't accurate but most of the aqi sensor is costly so made this has alternate)
• BMP280
• GUVA-S12SD
• MAX9814
• MPU6050
• OLED display
• ThingSpeak + Streamlit dashboard

Would love honest feedback from you guys. Does the time-based exposure idea make sense? Also, are there any improvements or integrations you think would make this more useful/practical?

Hey guys, i made a project called Multi-Sensor Fusion Based Personalized Environmental Monitoring System (PEMS) built using ESP32.

The system monitors AQI, UV, temperature, noise, and user activity in real time, then combines them into a single Exposure Score out of 100. Instead of giving alerts based only on instant values, I’m trying a time-based exposure model where longer exposure increases risk faster.

Example:

• High AQI for 2–3 mins , small score increase
• High AQI for 20–30 mins , much faster increase

I also used an accelerometer because I thought physical activity should affect exposure (more movement = potentially more inhalation). If the exposure score crosses 80+, an LED blinks and a Telegram alert is sent to the user’s phone.

Currently using:

• ESP32
• MQ135(i know it isn't accurate but most of the aqi sensor is costly so made this has alternate)
• BMP280
• GUVA-S12SD
• MAX9814
• MPU6050
• OLED display
• ThingSpeak + Streamlit dashboard

Would love honest feedback from you guys. Does the time-based exposure idea make sense? Also, are there any improvements or integrations you think would make this more useful/practical?

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