How to integrate pywws with various weather services¶
This guide gives brief instructions on how to use pywws with some other weather services and software. It is not comprehensive, and some services (such as Twitter) are covered in more detail elsewhere.
YoWindow is a weather display widget that can display data from an internet source, or from your weather station. To display data from your station pywws needs to write to a local file, typically every 48 seconds when new data is received. This is easy to do:
Stop all pywws software
yowindow.xmlexample template to your text template directory.
If you haven’t already done so, edit
weather.iniand set the
local_filesentry in the
[paths]section to a suitable directory for your yowindow file.
Add the yowindow template to the
weather.ini. Set its flags to
'L'so the result is copied to your local directory instead of being uploaded to an ftp site:
[live] text = [('yowindow.xml', 'L')]
Restart pywws live logging.
You can check the file is being updated every 48 seconds by using
cat to dump it to the screen.
Finally configure yowindow to use this file. See http://yowindow.com/pws_setup.php for instructions on how to do this.
See How to configure pywws to post messages to Twitter for full instructions.
The remaining weather service uploads are handled by the
See the module’s documentation for general configuration options.
The following subsections give further information about some of the available services.
Citizen Weather Observer Program¶
Nieuw in versie 14.02.dev1156.
Web site: http://www.wxqa.com/
Create account: http://www.wxqa.com/SIGN-UP.html
[cwop] designator = EW9999 latitude = 5130.06N longitude = 00008.52E template = default [logged] services = ['cwop', 'underground'] [live] services = ['cwop', 'underground_rf']
or, for radio hams:
[cwop] designator = G4XXX passcode = xxxxxx latitude = 5130.06N longitude = 00008.52E template = default [logged] services = ['cwop_ham', 'underground'] [live] services = ['cwop_ham', 'underground_rf']
Note that the latitude and longitude must be in “LORAN” format and leading zeros are required. See question 3 in the CWOP FAQ for more information.
Licensed radio hams use their callsign as the designator and need a passcode.
They should use the service name
cwop_ham instead of
cwop when running
pywws.toservice directly and in the
[cwop] config section is used for both.)
CWOP uploads are rate-limited by pywws, so you can safely add it to both the
[logged] sections in
The CWOP/APRS uploader is based on code by Marco Trevisan <email@example.com>.
Nieuw in versie 14.12.0.dev1260.
MQTT is a “message broker” system, typically running on
localhost or another computer in your home network.
Use of MQTT with pywws requires an additional library.
See Dependencies - MQTT for details.
Mosquitto (a lightweight broker): http://mosquitto.org/
[mqtt] topic = /weather/pywws hostname = localhost port = 1883 client_id = pywws retain = True auth = False user = unknown password = unknown template = default multi_topic = False [logged] services = ['mqtt', 'underground']
pywws will publish a JSON string of the data specified in the
This data will be published to the broker running on hostname, with the port number specified.
(An IP address can be used instead of a host name.)
client_id is a note of who published the data to the topic.
topic can be any string value, this needs to be the topic that a subscriber is aware of.
retain is a boolean and should be set to
False (or left at the default
If set to
True this will flag the message sent to the broker to be retained.
Otherwise the broker discards the message if no client is subscribing to this topic.
This allows clients to get an immediate response when they subscribe to a topic, without having to wait until the next message is published.
password can be used for MQTT authentication.
multi_topic is a boolean and should be set to
If set to
True pywws will also publish all the data each as separate subtopics of the configured
i.e., with the
topic set to /weather/pywws pywws will also publish the outside temperature to
/weather/pywws/temp_out and the inside temperature to
If these aren’t obvious to you it’s worth doing a bit of reading around MQTT. It’s a great lightweight messaging system from IBM, recently made more popular when Facebook published information on their use of it.
This has been tested with the Mosquitto Open Source MQTT broker, running on a Raspberry Pi (Raspian OS). TLS (mqtt data encryption) is not yet implemented.
Thanks to Matt Thompson for writing the MQTT code and to Robin Kearney for adding the retain and auth options.
UK Met Office¶
Web site: http://wow.metoffice.gov.uk/
[metoffice] site id = 12345678 aws pin = 987654 template = default [logged] services = ['metoffice', 'underground']
Open Weather Map¶
Web site: http://openweathermap.org/
Create account: http://home.openweathermap.org/users/sign_up
[openweathermap] lat = 51.501 long = -0.142 alt = 10 user = ElizabethWindsor password = corgi id = Buck House template = default [logged] services = ['openweathermap', 'underground']
When choosing a user name you should avoid spaces (and probably non-ascii characters as well). Having a space in your user name causes strange “internal server error” responses from the server.
The default behaviour is to use your user name to identify the weather station.
However, it’s possible for a user to have more than one weather station, so there is an optional
name parameter in the API that can be used to identify the station.
This appears as
Make sure you choose a name that is not already in use.
Web site: http://www.pwsweather.com/
Create account: http://www.pwsweather.com/register.php
API based on WU protocol: http://wiki.wunderground.com/index.php/PWS_-_Upload_Protocol
[pwsweather] station = ABCDEFGH1 password = xxxxxxx template = default [logged] services = ['pwsweather', 'underground']
Web site: http://www.temperatur.nu/
[temperaturnu] hash = ??? template = default [logged] services = ['temperaturnu', 'underground']
You receive the hash value from the temperatur.nu admins during sign up. It looks like “d3b07384d113edec49eaa6238ad5ff00”.
Create account: http://www.wunderground.com/members/signup.asp
[underground] station = ABCDEFGH1 password = xxxxxxx template = default [logged] services = ['underground', 'metoffice']
Weather Underground “RapidFire” updates¶
Weather Underground has a second upload URL for real time updates as little as 2.5 seconds apart.
If you run pywws in ‘live logging’ mode (see How to set up ‘live’ logging with pywws) you can use this to send updates every 48 seconds, by adding ‘underground_rf’ to the
[live] tasks section in
[underground] station = ABCDEFGH1 password = xxxxxxx template = default [live] services = ['underground_rf'] [logged] services = ['underground', 'metoffice']
Make sure you still have an ‘underground’ service in
This will ensure that ‘catchup’ records are sent to fill in any gaps if your station goes offline for some reason.
Register station: http://www.wetter.com/mein_wetter/wetterstation/willkommen/
[wetterarchivde] user_id = 12345 kennwort = ab1d3456i8 template = default [logged] services = ['wetterarchivde', 'underground'] [live] services = ['wetterarchivde', 'underground_rf']
Custom Request Headers¶
pywws.toservice module does support the injection of one or more
custom request headers for special cases where you want to integrate with a
service that, for example, requires you to pass an authentication key header
along with each request, such as
These headers can be added to your
a_service.ini file in the format of key
[config] url = https://my-aws-api-gw.execute-api.eu-west-1.amazonaws.com/test/station catchup = 100 interval = 0 use get = True result =  auth_type = None http_headers = [('x-api-key', 'my-api-key'), ('x-some-header', 'value')]
Comments or questions? Please subscribe to the pywws mailing list http://groups.google.com/group/pywws and let us know.