This is a collection of tools to make a little weather monitoring station, if you are armed with a webcam, arduino, an extra server, and some sensors to your arduino.

Everything in this project is licensed under GPLv3 unless otherwise specified. See the LICENSE file, or at http://www.gnu.org/licenses/gpl-3.0.html .

I think at least the following have their own licenses:

• image-generator/fonts/*
• streamer/streamer_config.sh
• arduino/OneWire.*
• arduino/ds18b20p.*

The DS18B20P library for Arduino is by me and with Creative Commons Attribution-ShareAlike 3.0 Unported License., however when using lweamonit as a whole, you don't need to attribute me for that library. Only if you extract that library and do something else with it.

These are the requirements I am aware of:

• Arduino and a DS18B20-PAR sensor or some programming skill
• Linux / http://distrowatch.com/
• UVC driver compatible camera / http://www.ideasonboard.org/uvc/
• MJPG-streamer / http://sourceforge.net/projects/mjpg-streamer/
• Python / http://www.python.org/
• Bash / http://www.gnu.org/s/bash/

You could use some other OS and type of camera if you figure out how to get images off them yourself, other than mjpg_streamer. Please, feel free to modify the system to work with other OSes and camera types. I just wish you don't break any existing functionality, and contribute your patches to the project.

It shouldn't be that big of a PITA to support any other OS as long as you can set up a HTTP server to send the data or modify the image reader to fetch it otherwise. If you do, please do send me patches.

In the arduino subfolder there is a project that I personally use for this. It will function perfectly fine with a single DS18B20-PAR sensor. Open up the config.h -file and make sure the settings look ok. Then just deploy the code on your Arduino with the Arduino IDE or any other tools you want to use.

If you do any custom coding the format expected by Python is as follows: SENSOR_NAME1: 123.123|SENSOR_NAME2: 321.321

So pipe separated line with sensor name and numeric value separated with a colon.

If you have an UVC driver compatible camera (and the drivers installed), as well as MJPG-streamer installed, you can use the tools in the streamer -subfolder to help you run the image server.

Copy config.ini.template to config.ini and check that the values look good and then add check_mjpg_streamer.sh to your crontab.

In the image-generator -subfolder is a Python application I've written to read data off the USB port on linux, fetch an image the webcam server and draw the temperature data on the image.

To use it, copy the config.json.template to config.json and configure to taste.

For more DejaVu fonts go to http://dejavu-fonts.org/ .

It should support multiple sensor readings being drawn on the image.

This tool can use the data and some configuration to generate images such as this:

The easy way is to just have lweamonit image-generator to generate the images in your public HTML folder or similar. However, if you're not planning on hosting the images on the same server as you're running lweamonit on (like me), you should be able to set up an rsync over SSH fairly easily to the server of your choosing.

For more information, go to http://bit.ly/158bNR5 .

If this documentation is not enough, you might find something more at http://github.com/lietu/lweamonit/ .

This project has been made possible thanks to Cocreators and Lietu. You can help us continue our open source work by supporting us on Buy me a coffee.