Air quality monitor

• Raspberry Pi
• Adafruit CCS811 Air Quality Sensor
• Carbon Dioxide Sensor SCD30

Hardware

 RPI           SCD30
-------|     |--------| 
   3V3 |-----| VIN    |
   GND |-----| GND    |
   SDA |-----| RX/SDA |
   SCL |-----| TX/SCL |
 GPIO4 |-----| RDY    |
-------|     | PWM    |
             | SEL    |
             |--------|
 
 RPI           CCS811
-------|     |--------| 
   3V3 |-----| VIN    |
   GND |-----| GND    |
   SDA |-----| SDA    |
   SCL |-----| SCL    |
       |     | ___    |
GPIO17 |-----| INT    |
       |     | ___    | 
   GND |-----| WAK    |
-------|     | ___    |
             | RST    |
             |--------|

Raspbian requirements

• Raspbian GNU/Linux 9.6 (stretch)
• Python 3.5 + pipenv
• Decrease I2C speed:
  • sudo nano /boot/config.txt
  • Add dtparam=i2c_baudrate=10000

Install

pipenv install

Run CLI

pipenv run python air_quality_monitor/src/monitor.py

Run CSV

• pipenv run python air_quality_monitor/src/csv_monitor.py
• Check air_log.csv

Run WEB

• pipenv run python air_quality_monitor/src/web_monitor.py
• Open browser on 192.168.1.33:8000, where 192.168.1.33 - local RPi IP

Project overview

• src/
  • scd30.py - driver for SCD30
  • ccs811.py - driver for CCS811
  • monitor.py - Base monitor
  • web_monitor.py - WEB air monitor
  • csv_monitor.py - CSV air monitor
• doc/ - sensor's datasheets
• static/ - HTML pages got web air monitor