ESP32 air quality monitoring system with AWS backend and web dashboard.

Live Dashboard: https://rvvmpg3lroorsalecnrbr3tyyu0bogsv.lambda-url.us-east-1.on.aws/

Hardware: ESP32 + Sensirion SPS30 (PM2.5) + SCD41 (CO₂/temp/humidity) + SGP30 (TVOC) + OLED display

Libraries (Arduino IDE):

• Adafruit SSD1306, GFX Library, BusIO
• Sensirion I2C SCD4x, Sensirion I2C Sps30
• Adafruit SGP30 Sensor
• ArduinoJson

Setup:

cd air_monitor/
cp config.example.h config.h
# Edit config.h with WiFi credentials and API details
# Upload to ESP32

Setup:

cd service/
cp config.example.sh config.sh
# Edit config.sh with AWS credentials
./update-lambda.sh

API: POST /readings with x-api-key header

Setup:

cd frontend/
npm install
./deploy.sh

Real-time dashboard with interactive charts, time filtering, and device selection.