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Weather Binding

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gerrieg edited this page Nov 23, 2014 · 19 revisions

Introduction

The Weather binding collects current and forecast weather data from different provides with a free weather API. You can also display weather data with highly customizable html layouts and icons.

Currently supported weather providers:

Configuration

openhab.cfg

############################## Weather Binding ##############################
#
# The apikey for the different weather providers, at least one must be specified
# Note: Hamweather requires two apikeys: client_id=apikey, client_secret=apikey2
#weather:apikey.ForecastIo=
#weather:apikey.OpenWeatherMap=
#weather:apikey.WorldWeatherOnline=
#weather:apikey.Wunderground=
#weather:apikey.Hamweather=
#weather:apikey2.Hamweather=

# location configuration, you can specify multiple locations
#weather:location.<locationId1>.name=
#weather:location.<locationId1>.latitude=
#weather:location.<locationId1>.longitude=
#weather:location.<locationId1>.provider=
#weather:location.<locationId1>.language=
#weather:location.<locationId1>.updateInterval=

#weather:location.<locationId2>.name=
#weather:location.<locationId2>.latitude=
#weather:location.<locationId2>.longitude=
#weather:location.<locationId2>.provider=
#weather:location.<locationId2>.language=
#weather:location.<locationId2>.updateInterval=

Before you can use a weather provider, you need to register a free apikey on the website of the provider.
Note: Hamweather has two apikeys (client_id, secret_id), Yahoo does not need a apikey.

Now you can specify locations. Every location has a locationId that can be referenced from an item. A location has five required parameters.

  • latitude, longitude: the coordinates the weather is retrieved from
  • provider: a reference to a provider name
  • language: the language of the weather condition text (see provider homepage for supported languages)
  • updateInterval: the interval in minutes the weather is retrieved
  • name: (optional), the name of the location, useful for displaying in html layouts

Important: Every weather provider has a daily request limit for the free weather api. Also the weather does not change quickly, so please choose a moderate updateInterval. The request limit can be found on the weather provider website.

Example: Let's display the current temperature and humidity in Salzburg (AT) from Yahoo.
openhab.cfg

weather:location.home.latitude=47.8011
weather:location.home.longitude=13.0448
weather:location.home.provider=Yahoo
weather:location.home.language=de
weather:location.home.updateInterval=10

Item

Number   Temperature   "Temperature [%.2f °C]"   {weather="locationId=home, type=temperature, property=current"}
Number   Humidity      "Humidity [%d %%]"        {weather="locationId=home, type=athmosphere, property=humidity"}

For Yahoo you don't need a apikey. The location has the locationId home and updates the weather data every 10 minutes.
In the item file, you reference the locationId and the type and property to display (see below for more).
Let's say you want to switch to another provider, ForecastIo. All you have to do is register your apikey, configure it and change the provider in your location:
openhab.cfg (example key is not a registered key!)

weather:apikey.ForecastIo=sdf7g69fdgdfg679dfg69sdgkj

weather:location.home.provider=ForecastIo

Now the weather data is retrieved from ForecastIo, your item file does not need to be changed! Let's say you want to have the current temperature from ForecastIo and the humidity from OpenWeatherMap.
openhab.cfg

// example keys are not a registered keys!
weather:apikey.ForecastIo=sdf7g69fdgdfg679dfg69sdgkj
weather:apikey.OpenWeatherMap=766967gdfgdfgs9g76dsfg5ds76g521

weather:location.home-FIO.latitude=47.8011
weather:location.home-FIO.longitude=13.0448
weather:location.home-FIO.provider=ForecastIo
weather:location.home-FIO.language=de
weather:location.home-FIO.updateInterval=10

weather:location.home-OWM.latitude=47.8011
weather:location.home-OWM.longitude=13.0448
weather:location.home-OWM.provider=OpenWeatherMap
weather:location.home-OWM.language=de
weather:location.home-OWM.updateInterval=10

Item

Number   Temperature   "Temperature [%.2f °C]"   {weather="locationId=home-FIO, type=temperature, property=current"}
Number   Humidity      "Humidity [%d %%]"        {weather="locationId=home-OWM, type=athmosphere, property=humidity"}

Or you want to see the current temperature if there is a difference between providers and which one gives the best result for your location. This can be done with all available type/properties of course.

Number   Temperature_FIO   "Temperature-FIO [%.2f °C]"   {weather="locationId=home-FIO, type=temperature, property=current"}
Number   Temperature_OWM   "Temperature-OWM [%.2f °C]"   {weather="locationId=home-OWM, type=temperature, property=current"}

Available bindings

  • type athmosphere
    • property humidity, visibility, visibility, pressure, pressure, pressureTrend, ozone
  • type clouds
    • property percent
  • type condition
    • property text, observationTime, id, lastUpdate, commonId
  • type precipitation
    • property rain, rain, snow, snow, probability
  • type temperature
    • property current, min, max, feel, dewpoint, minMax
  • type wind
    • property speed, direction, degree, gust, chill

Important: type and property are case sensitive! So enter the values exactly as shown.
Every weather provider sends different data, so not all properties are set. If you want to know which provider sends which properties, switch the binding to DEBUG Mode (see below).

Number formatting

Each item can be formatted with the parameters roundingMode and scale. Supported roundingModes and what they do can be found in the JavaDocs. Default values are roundingMode=half_up and scale=2.

Example:

// default
String   Temperatur_MinMax   "Min/Max [%s °C]"   {weather="locationId=home, forecast=0, type=temperature, property=minMax"}
> Temperatur_MinMax state updated to 8.91/17.25

// scale set to 0
String   Temperatur_MinMax   "Min/Max [%s °C]"   {weather="locationId=home, forecast=0, type=temperature, property=minMax, scale=0"}
> Temperatur_MinMax state updated to 9/17

// roudingMode and scale set
String   Temperatur_MinMax   "Min/Max [%s °C]"   {weather="locationId=home, forecast=0, type=temperature, property=minMax, roundingMode=down, scale=0"}
> Temperatur_MinMax state updated to 8/17

Unit conversion

The default units are:

  • speed: kilometer per hour
  • temperature: celsius
  • precipitation: rain in millimeters and snow in centimeter
  • pressure: millibar

You can convert numeric values to other units with the unit parameter. Example to convert the temperature from celsius to fahrenheit:

Number   Temperature_F    "Temperature [%.2f °F]"   {weather="locationId=home, type=temperature, property=current, unit=fahrenheit"}

All possible conversions can be found in the following Items section.

Items

If you copy and paste, don't forget to change the locationId to the one you specified.

// athmosphere
Number   Humidity    	  "Humidity [%d %%]"  	  {weather="locationId=home, type=athmosphere, property=humidity"}
Number   Visibility    	  "Visibility [%.2f km]"  {weather="locationId=home, type=athmosphere, property=visibility"}
Number   Visibility_Mph   "Visibility [%.2f mi]"  {weather="locationId=home, type=athmosphere, property=visibility, unit=mph"}
Number   Pressure    	  "Pressure [%.2f mb]"    {weather="locationId=home, type=athmosphere, property=pressure"}
Number   Pressure_Inches  "Pressure [%.2f in]"    {weather="locationId=home, type=athmosphere, property=pressure, unit=inches"}
String   Pressure_Trend   "Pressuretrend [%s]"    {weather="locationId=home, type=athmosphere, property=pressureTrend"}
Number   Ozone            "Ozone [%d ppm]"    	  {weather="locationId=home, type=athmosphere, property=ozone"}

// clouds
Number   Clouds   "Clouds [%.0f %%]"   {weather="locationId=home, type=clouds, property=percent"}

// condition
String   Condition        "Condition [%s]"      {weather="locationId=home, type=condition, property=text"}
String   Condition_ID     "Condition id [%s]"   {weather="locationId=home2, type=condition, property=id"}
DateTime ObservationTime  "Observation time [%1$td.%1$tm.%1$tY %1$tH:%1$tM]"   {weather="locationId=home, type=condition, property=observationTime"}
DateTime LastUpdate       "Last update [%1$td.%1$tm.%1$tY %1$tH:%1$tM]"        {weather="locationId=home, type=condition, property=lastUpdate"}
String   CommonId         "Common id [%s]"      {weather="locationId=home, type=condition, property=commonId"}

// precipitation
Number   Rain          "Rain [%.2f mm/h]"   {weather="locationId=home, type=precipitation, property=rain"}
Number   Rain_Inches   "Rain [%.2f in/h]"   {weather="locationId=home, type=precipitation, property=rain, unit=inches"}
Number   Snow          "Snow [%.2f mm/h]"   {weather="locationId=home, type=precipitation, property=snow"}
Number   Snow_Inches   "Snow [%.2f in/h]"   {weather="locationId=home, type=precipitation, property=snow, unit=inches"}
Number   Precip_Probability   "Precip probability [%d %%]"   {weather="locationId=home, type=precipitation, property=probability"}

// temperature
Number   Temperature      "Temperature [%.2f °C]"       {weather="locationId=home, type=temperature, property=current"}
Number   Temperature_F    "Temperature [%.2f °F]"       {weather="locationId=home, type=temperature, property=current, unit=fahrenheit"}
Number   Temp_Feel        "Temperature feel [%.2f °C]"  {weather="locationId=home, type=temperature, property=feel"}
Number   Temp_Feel_F      "Temperature feel [%.2f °F]"  {weather="locationId=home, type=temperature, property=feel, unit=fahrenheit"}
Number   Temp_Dewpoint    "Dewpoint [%.2f °C]"          {weather="locationId=home, type=temperature, property=dewpoint"}
Number   Temp_Dewpoint_F  "Dewpoint [%.2f °F]"          {weather="locationId=home, type=temperature, 
property=dewpoint, unit=fahrenheit"}
// min and max values only available in forecasts
Number   Temp_Min         "Temperature min [%.2f °C]"   {weather="locationId=home, type=temperature, property=min"}
Number   Temp_Min_F       "Temperature min [%.2f °F]"   {weather="locationId=home, type=temperature, property=min, unit=fahrenheit"}
Number   Temp_Max         "Temperature max [%.2f °C]"   {weather="locationId=home, type=temperature, property=max"}
Number   Temp_Max_F       "Temperature max [%.2f °F]"   {weather="locationId=home, type=temperature, property=max, unit=fahrenheit"}
String   Temp_MinMax      "Min/Max [%s °C]"             {weather="locationId=home, type=temperature, property=minMax"}
String   Temp_MinMax_F    "Min/Max [%s °F]"             {weather="locationId=home, type=temperature, property=minMax, unit=fahrenheit"}

// wind
Number   Wind_Speed           "Windspeed [%.2f km/h]"    {weather="locationId=home, type=wind, property=speed"}
Number   Wind_Speed_Beaufort  "Windspeed Beaufort [%d]"  {weather="locationId=home, type=wind, property=speed, unit=beaufort"}
Number   Wind_Speed_Knots     "Windspeed [%.2f kn]"      {weather="locationId=home, type=wind, property=speed, unit=knots"}
Number   Wind_Speed_Mps       "Windspeed [%.2f mps]"     {weather="locationId=home, type=wind, property=speed, unit=mps"}
Number   Wind_Speed_Mph       "Windspeed [%.2f mph]"     {weather="locationId=home, type=wind, property=speed, unit=mph"}
String	 Wind_Direction       "Wind direction [%s]"      {weather="locationId=home, type=wind, property=direction"}
Number   Wind_Degree          "Wind degree [%.0f °]"     {weather="locationId=home, type=wind, property=degree"}
Number   Wind_Gust            "Wind gust [%.2f km/h]"    {weather="locationId=home, type=wind, property=gust"}
Number   Wind_Gust_Beaufort   "Wind gust Beaufort [%d]"  {weather="locationId=home, type=wind, property=gust, unit=beaufort"}
Number   Wind_Gust_Knots      "Wind gust [%.2f kn]"      {weather="locationId=home, type=wind, property=gust, unit=knots"}
Number   Wind_Gust_Mps        "Wind gust [%.2f mps]"     {weather="locationId=home, type=wind, property=gust, unit=mps"}
Number   Wind_Gust_Mph        "Wind gust [%.2f mph]"     {weather="locationId=home, type=wind, property=gust, unit=mph"}
Number   Wind_Chill           "Wind chill [%.2f °C]"     {weather="locationId=home, type=wind, property=chill"}
Number   Wind_Chill_F         "Wind chill [%.2f °F]"     {weather="locationId=home, type=wind, property=chill, unit=fahrenheit"}

Forecast

All bindings can also be used for forecasts. You only have to add the forecast day in the item.
Display tomorrows min and max temperature forecast:

Number   Temp_Min         "Temperature min [%.2f °C]"   {weather="locationId=home, forecast=1, type=temperature, property=min"}
Number   Temp_Max         "Temperature max [%.2f °C]"   {weather="locationId=home, forecast=1, type=temperature, property=max"}

0 = todays forecast
1 = tomorrows forecast
and so on

Each provider sends different forecast days.

  • ForecastIo: 8 days (0-7)
  • OpenWeatherMap: 5 days (0-4)
  • WorldWeatherOnline: 5 days (0-4)
  • Wunderground: 10 days (0-9)
  • Hamweather: 5 days (0-4)
  • Yahoo: 5 days (0-4)

Note: If you omit the forecast property, the current conditions are shown, if you specify forecast=0, the forecast for today is shown.

Data accuracy

It highly dependes on your location and which weather provider you choose. Some providers updates the data in realtime, others only once in a hour. You have to test yourself and find the best provider for your location.

Common Id

The common id property (locationId=..., type=condition, property=commonId) is an attempt to have a unique weather id for all providers. This is useful for displaying weather icons and a short condition text message. The documentation from the different weather providers are partially poor, hence the mapping is partially a guess and needs to be optimized with your help. If you think the commonId/weather icon is wrong, just contact me.
If you want to see the current mapping, you can open the file common-id-mappings.xml in the binding jar.

Example to use a common condition text message:

String   CommonCondition   "[MAP(weather_en.map):%s]"   {weather="locationId=..., type=condition, property=commonId"}

Example map files for english and german are in the download section.

Html Layouts

The binding provides a url to serve highly customizable html layouts for displaying weather data and icons. You have to add some folders/files to the openhab webapps folder:

The weather-data folder is the root, the images folder contains the different iconsets with 32 weather icons. In the layouts folder are the layout html files. You can add as many html layout files you want. You can use tokens to map weather data, items and more into the html layout.

Tokens:

  • Item: ${item:ITEM_NAME.[value|state|label|full]}
  • Weather: ${weather:TYPE.PROPERTY}
  • Forecast: ${forecast(DAY):TYPE.PROPERTY}
  • LocationConfig: ${config:CONFIG_PROPERTY}
  • RequestParameter: ${param:PARAMETER_NAME}

Example:

// locationConfig data from openhab.cfg
${config:name}
${config:latitude}
${config:longitude}

// weather and forecast data directly from the weather objects
${weather:athmosphere.humidity}
${weather:temperature.current}
${forecast(0):temperature.minMax}

// request parameter
${param:iconset}

// item
${item:Current_Temp.value}
${item:Current_Temp.state}
${item:Current_Temp.label}
${item:Current_Temp.full}

See example.html in the layouts folder. You can download the weather-data folder in the download section.

Using the layout file:
You must specify a locationId and a layout parameter, iconset is optional (default=colorful)
Either directly:
http://HOST:8080/weather?locationId=home&layout=example&iconset=colorful
or in a sitemap:
Webview url="/weather?locationId=home&layout=example&iconset=colorful" height=7

Note: The binding works with openHab 1.5.x too, for the Webview in a sitemap you need 1.6 and this Pull-Request must be accepted first!

Debugging and Tracing

If you want to see which data a provider sends, switch the loglevel in logback.xml to DEBUG.

<logger name="org.openhab.binding.weather" level="DEBUG" />

If you want to see even more, switch to TRACE to also see the communication with the provider.

<logger name="org.openhab.binding.weather" level="TRACE" />

Troubleshooting

I assume, the binding is in your addons folder.

  • In the openHab logfile you must see for each configured apikey one line with
    ProviderConfig[providerName=xx, apiKey=xxx]
    and for each configured location
    LocationConfig[providerName=xxx, language=xx, updateInterval=xx, latitude=xx.xxxx, longitude=xx.xxxx, locationId=xxx] If these entries do not exist, there is a problem in your openhab.cfg. A common problem is a space in front of the config properties.

  • If the items are still not populated, switch the binding to DEBUG mode and start openHab. Now you should see for every weather item a entry in your logfile:
    Adding item ... with WeatherBindingConfig[locationId=..., type=..., property=..., roundingMode=..., scale=...]
    If you don't see these entries, check your item file.

  • As mentioned earlier, every weather provider sends different data and not all available binding properties are set. If you want to know which provider sends which properties to optimize your items, switch the binding to DEBUG mode. At every refresh the weather data is logged to the logfile.

Download

weather-data with icons and example layout file
map-files with short condition text for the commonId

Add a custom footer

feature overview

Installation

Setup intro

###Linux / OS X

###Windows

##Configuration

Automation

User Interfaces

Persistence

Community

(link to openHAB forum)

Development

Bindings

Application Integration

Misc

Samples

A good source of inspiration and tips from users gathered over the years. Be aware that things may have changed since they were written and some examples might not work correctly.

Please update the wiki if you do come across any out of date information.

Binding configurations

Item definition examples

Sitemap definition examples

Collections of Rules on a single page

Single Rules

Scripts

Syntax highlighting for external editors

Release Notes

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