README.md

Air Quality Data Collector

In order to keep tracking the air quality such as CO2( which will make people drowsy), TVOC (Total Volatile Organic Compounds, which might damage people's health), temperature, humidity to make people feel more comfortable in the room. I want to build a data center, to collect data from types of sensors and plot these data in a website, also I want to compare these data with outside weather by the collected data from the government.

Hardware

Server:

• Raspberry Pi 4

Data collector:

• Arduino Uno
• Raspberry Pi 4 for Raspberry Pi Camera 2(new)

Sensor:

• DS18B20: detect temperature
• DHT22: detect Humidity and temperature
• SHARP GP2Y1014AU: detect PM2.5
• Gravity CCS811: detect CO2 and TVOC
• Raspberry Pi Camera 2(for the power consumption of extension cord)

Software:

Libraries:

• Raspberry Pi:
  • pyserial
  • arduino
  • arduino-mk
• Arduino:
  • pusubclient
  • ArduinoJson
  • DFRobot_CCS811
  • DallasTemperature
  • OneWire
  • DHT
  • PMS
  • SoftwareSerial

Working Goals:

to show the data collected from local and opensourse website and manage a way to show them

Workflow:

1. Collect data from local, and save them into db
2. Collect data from web, and save them into db
3. show the data by grafana, let me check it by internet
4. show the data by local screen, let me check it in my room

Long-term Goals:

• [] Add a local e-ink screen
• [] Add co2 sensor
• [] Add power consumption data of extension cord

Short-term Goals:

• [] Read extension cord data by seven segment LED
• [] Find a way to control e-ink screen
  • [] try c
  • try microPython

To-Do List

1. Reduce failed reading
2. Move functions into a package
3. Merge readElectricity.py into readSensor.py using asycio library

Used API

• air quality (pm2.5) https://data.epa.gov.tw/
• weather https://opendata.cwb.gov.tw/

issue

shutter speed too slow, sometimes there will be a afterimage -> trying to speed up and change some pre-process parameter to keep image reading quality

Reference data

DS18B20: detect temperature

DHT22: detect Humidity and temperature

SHARP GP2Y1014AU: detect PM2.5

datasheet

Gravity CCS811: detect CO2 and TVOC

Gravity: CCS811 Air Quality Sensor SKU: SEN0318