Weather Sensor/program for the Raspberry Pi B+
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README.md

raspberry-pi-weatherstation

Rebuild of a Pi powered weather station. The origial I did an instructable for (https://www.instructables.com/id/Complete-DIY-Raspberry-Pi-Weather-Station-with-Sof/) this one uses all off the self parts.

And wrote up a few thoughts about the project on my blog as well: https://spaceman-labs.com/2018/07/raspberry-pi-weather-station-mk2/

Uses a few standard sensors to track weather data:

  • Temperature - comes from 2 sensors the BMP and the DHT.
  • Soil temperature
  • Soil humidity
  • Light - via a photoresistor. The Higher the number the darker out.
  • Pressure
  • Humidity
  • 2 Air sensors - One does more dust and smoke, air quality. The other looks for gases like propane and butane.
  • Wind speed
  • Wind dir
  • Rain Gauge
  • Lightning detector - Currently having issues so commented out.

The analog sensors run through the MCP3008 chip to get converted to a digital reading.

The wiring and circuit boards are in the schematics directory and is a Fritzing file. There are also PDFs I used to print the PCB to thermal transfer paper and burn the Copper circuit boards. There are two boards: 1 in the main station for the MCP3008 A/D converter and photo resistor, and the 2nd is a "remote" unit that goes in the Amrite housing and does the air sensing, pressure, temp, and humidity, via 2 air sensors, the DHT, and the BMP.

Data is logged to a postgres table as well as a CSV file and the CSV file is rotated out nightly. The log file also contains some of the data and other debug statements.

Some frontend code is supplied to display/graph the data using Google Charts. This uses PHP to write javascript code, so it's far from ideal. Also needs more reusable code, since a bug or change needs to go across all the pages and I've currently not been fixing that. Timeframes are roughly 24 hrs and 7-days (for the files ending in 2). Currently very buggy and titles/labels aren't very accurate (months in javascript start at 0 not 1). Will probably rewrite the frontend to something like NodeJS that will integrate easier with Google Charts (or another plotting package)

I used Gitlab and gitlab pipelines to do some automated CI and testing so the gitlab-ci is provided for some of that.

Contents

Name Description
bom.md Bill of Materials - List of parts, counts, approximate prices and where to find.
schematics/ Fritzing Schematics for electronics
station-code/ Python3 Code.
station-code/collectweather.py Main code for collecting weather data.
README.md This file
LICENSE Apache 2.0 License
frontend/ Docker container from running PHP scripts to display the data.
structure.sql Postgresql Data schema.

Pi Setup

  • apt-get update
  • apt-get upgrade
  • apt-get dist-upgrade
  • apt-get autoremove
  • Turn on Interfacing Options:
    • SPI
    • I2C
    • 1-wire

Python Packages

  • sudo apt-get install libyaml-dev
  • pip3 install pyyaml
  • pip3 install structlog
  • pip3 install numpy
  • sudo apt-get install build-essential python-dev python3-dev
  • sudo pip install psycopg2

Postgresql Setup

  • sudo apt-get install postgresql-9.6
  • apt install postgresql libpq-dev postgresql-client postgresql-client-common
  • sudo update-rc.d postgresql enable
  • sudo su postgres
  • createuser weatherstation -P --interactive
  • createdb weatherstation
  • create table using structure.sql
  • GRANT ALL PRIVILEGES ON TABLE weatherdata TO weatherstation;
  • https://www.howtoforge.com/tutorial/postgresql-replication-on-ubuntu-15-04/

3rd Party Sensor Modules:

Add SSH key:

eval $(ssh-agent -s)
ssh-add ~/.ssh/other_id_rsa

Checkout Modules, run sudo python setup.py install

git clone https://github.com/PrzemoF/bmp183.git
git clone git://gist.github.com/3151375.git
git clone https://github.com/adafruit/Adafruit_Python_DHT.git
git clone https://github.com/adafruit/Adafruit_Python_GPIO.git
git clone https://github.com/adafruit/Adafruit_Python_MCP3008.git

Docker testing image:

docker build -t gitlab:4567/lab-projects/raspberry-pi-weatherstation .

Components

  • Leverages gitlab and pipelines to do tasks
  • Started with Database is Postgresql and the pgadmin interface to get GUI representation.

License and Authors

Author:: Kevin Kingsbury (@kmkingsbury)

Apache 2.0