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# pywws

Python software for USB Wireless WeatherStations
http://pythonhosted.org/pywws
http://jim-easterbrook.github.com/pywws/
http://github.com/jim-easterbrook/pywws/

This document is available in the following languages (non-English versions may not be complete or up to date):

> - English
> - Français – translated by Jacques Desroches
> - Italiano – translated by Edoardo

## Introduction

pywws is a collection of Python scripts to read, store and process data from popular USB wireless weather stations such as Elecsa AstroTouch 6975, Watson W-8681, WH-1080PC, WH1080, WH1081, WH3080 etc. I assume any model that is supplied with the EasyWeather Windows software is compatible, but cannot guarantee this.

The software has been developed to run in a low power, low memory environment such as a router. It can be used to create graphs and web pages showing recent weather readings, typically updated every hour. It can also send data to services such as Weather Underground and post messages to Twitter.

I have written this software to meet my needs, but have tried to make it adaptable to other people’s requirements. You may want to edit some or all of the modules, or write some new ones, to get it to do exactly what you want. One of the reasons for using Python is that it makes such alterations so easy. Don’t be afraid, just jump in and have a go.

## Requirements

The software you’ll need to run pywws depends on what you plan to do with it. You’ll need Python 2.5 or later – Python 3 is partially supported, some functionality depends on libraries that have not yet been ported to Python 3.

For more detail, see Dependencies.

## Installing and upgrading pywws

pywws can be installed directly from the Python Package Index (PyPI) using the pip command. See How to get started with pywws for full instructions.

Some new versions of pywws change what’s stored in the hourly, daily or monthly summary data files. These new versions are incompatible with processed data from earlier versions. The `pywws.Reprocess` script regenerates all the summary data. It should be run after any major upgrade.

## Documentation

Documentation is included with pywws downloads, and is also available online. A good starting place is How to get started with pywws which describes in more detail how to install pywws.

If you have questions not answered in the documentation, please join the pywws Google mailing list / discussion group and ask there. Note that your first message to the group will not appear immediately – new posters have to be approved by a moderator, to prevent spam messages.

### Contents

- Licence
- Dependencies
  - Essential
  - Running as a daemon
  - Graph drawing
  - Secure website uploading (sftp)
  - Twitter updates
  - To create new language translations
  - To ‘compile’ the documentation
- Change log
- User guides
  - How to get started with pywws
  - How to set up ‘hourly’ logging with pywws
  - How to set up ‘live’ logging with pywws
  - How to integrate pywws with various weather services
  - How to configure pywws to post messages to Twitter
  - How to use pywws in another language
  - weather.ini - configuration file format
  - status.ini - status file format
  - Humidity Index (Humidex)
- Python modules
  - Set up and configure pywws
  - Get data and process it
  - “Internal” modules

### Indices and tables

- Index
- Module Index
- Search Page

## Credits

I would not have been able to get any information from the weather station without access to the source of Michael Pendec’s “wwsr” program. I am also indebted to Dave Wells for decoding the weather station’s “fixed block” data.

Last of all, a big thank you to all the pywws users who have helped with questions and suggestions, and especially to those who have translated pywws and its documentation into other languages.

## Legalese

pywws - Python software for USB Wireless WeatherStations.
http://github.com/jim-easterbrook/pywws
Copyright (C) 2008-14 Jim Easterbrook jim@jim-easterbrook.me.uk

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Comments or questions? Please subscribe to the pywws mailing list http://groups.google.com/group/pywws and let us know.

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