RPi-temperature

Description

Scripts related to Raspberry Pi temperature logger project for reading temperature values from DS18B20 sensor device and reading the data forward to Zabbix monitoring system.

Status

• Scripts work
• Frontend stuff basically works, although there are some work (and ideas) still left.

Contents

data/:

• The database location

http/:

• Frontend made with Yii.

scripts/w1-temp:

• reads a value from the sensor and writes it to STDOUT

scripts/w1-store-temp:

• Creates a new SQLite database if it does not already exist
• Inserts the value to the database

README.md:

• This README

Installation

Assumption is that you have the Raspberry Pi (naturally) fixed with One Wire temperature sensor (DS18B20) to report temperature values. Read here about my setup.

• Install required packages: sudo apt-get install sqlite3 git apache2.

• Download the project

    $ cd /opt
    $ sudo mkdir RPi-temperature
    $ sudo chown pi:pi RPi-temperature
    $ git clone git://github.com/grassroot/RPi-temperature.git

• Change Apache's default webroot to point into application directory by modifying file /etc/apache2/sites-available/default:

  • Modify DocumentRoot /var/www to DocumentRoot /opt/RPi-temperature/http/application.
  • Modify <Directory /var/www> to <Directory /opt/RPi-temperature/http/application>.
  • Reload the apache configuration: sudo /etc/init.d/apache2 reload.

• Add a following lines to your crontab to store the temperature values to the database. The script will create the database under data/ at first run.

    # Store temperature values to the database every 10 minutes
    */10 * * * * /opt/RPi-temperature/scripts/w1-store-temp

• Run the store-script manually to initialize the database and make sure it works.

• Modify the database file and directory for Apache to be able to access it properly.

    $ cd /opt/RPi-temperature
    $ sudo chgrp -R www-data data
    $ sudo chmod g+w -R www-data data

• With your favourite browser, locate to the Pi's IP-address, and you should see a home page listing the latest temperature values.

• Go to Locations-page and change the current location of the Pi.

Datz it, enjoy :-)