AirBox for Raspberry PI

Detect Air quality ,humidity , temperature and calculation comfort level.

Referance material

• i2c kernel documentation
• Official SHT31 c++ library for Arduino
• SHT31 manufacturer data sheet
• KQM2801AI c library for Raspberry PI
• KQM2801AI data sheet

Prerequisites

This sh131 implimentation depends on i2c dev lib

• sudo apt-get install libi2c-dev

Below is also a good one to have while debugging, but be careful i2cdump from the below cause the sht31 interface to become unstable for me and requires a hard-reset to recover correctly.

• sudo apt-get install i2c-tools

Download lcdi2c library

• wget http://telecnatron.com/articles/Utility-To-Control-1602-LCD-On-Raspberry-Pi-Via-A-PCF8574-I2C-Backpack-Module/lcdi2c

install pip and line-bot-sdk for Line bot

• wget https://bootstrap.pypa.io/get-pip.py
• python2 get-pip.py
• pip install line-bot-sdk

Build

• make will output AirBox execute file.

Execute

put AirBox and lcdi2c in the same place.

• ./AirBox

LCD result show case

• ──────────────────
• ∣ 25°C 49% 10.6PP ∣
• ∣ Comfo ok Bad ∣
• ──────────────────

Explain:

• 25°C ← Temperature
• 49% ← Humidity
• 10.6PP ← PPM
• Comfo ← Comfort level
• ok ← Humidity level
• Bad ← Air quality