# Air Quality Binding
This binding uses the AQIcn.org service (opens new window) for providing air quality information for any location worldwide.
The World Air Quality Index project is a social enterprise project started in 2007. Its mission is to promote Air Pollution awareness and provide a unified Air Quality information for the whole world.
The project is proving a transparent Air Quality information for more than 70 countries, covering more than 9000 stations in 600 major cities, via those two websites: aqicn.org (opens new window) and waqi.info (opens new window).
To use this binding, you first need to register and get your API token (opens new window).
# Supported Things
Bridge: The binding supports a bridge to connect to the AQIcn.org service (opens new window). A bridge uses the thing ID "api".
Station: Represents the air quality information for an observation location.
Of course, you can add multiple Stations, e.g. for measuring AQI for different locations.
# Discovery
Local Air Quality can be autodiscovered based on system location. You will created a Bridge with your apiKey.
# Bridge Configuration
The bridge configuration only holds the api key :
| Parameter | Description |
|---|---|
| apiKey | Data-platform token to access the AQIcn.org (opens new window) service. Mandatory. |
# Thing Configuration
The 'Station' thing has a few configuration parameters:
| Parameter | Description |
|---|---|
| location | Geo coordinates to be considered by the service. |
| stationId | Unique ID of the measuring station. |
| refresh | Refresh interval in minutes. Optional, the default value is 60 minutes. |
For the location parameter, the following syntax is allowed (comma separated latitude and longitude):
37.8,-122.4
37.8255,-122.456
If you always want to receive data from specific station and you know its unique ID, you can enter it instead of the coordinates.
This stationId can be found by using the following link:
https://api.waqi.info/search/?token=TOKEN&keyword=NAME (opens new window), replacing TOKEN by your apiKey and NAME by the station you are looking for.
# Thing properties
Once created, at first execution, the station's properties will be filled with informations gathered from the web service :
- Nearest measuring station location
- Measuring station ID
- Latitude/longitude of measuring station
# Channels
The AirQuality information that is retrieved for a given is available as these channels:
# AQI Channels Group - Global Results
| Channel ID | Item Type | Description |
|---|---|---|
| alert-level | Number | Alert level (*) associated to AQI Index. |
| index | Number | Air Quality Index |
| timestamp | DateTime | Observation date and time |
| dominent | String | Dominent Pollutant |
| icon | Image | Pictogram associated to alert-level |
| color | Color | Color associated to alert level. |
# Weather Channels Group
| Channel ID | Item Type | Description |
|---|---|---|
| temperature | Number:Temperature | Temperature in Celsius degrees |
| pressure | Number:Pressure | Pressure level |
| humidity | Number:Dimensionless | Humidity level |
| dew-point | Number:Temperature | Dew point temperature |
| wind-speed | Number:Speed | Wind speed |
# Pollutants Channels Group
For each pollutant (PM25, PM10, O3, NO2, CO, SO2) , depending upon availability of the station, you will be provided with the following informations
| Channel ID | Item Type | Description |
|---|---|---|
| value | Number:Density | Measured density of the pollutant |
| index | Number | AQI Index of the single pollutant |
| alert-level | Number | Alert level associate to the index |
(*) The alert level is described by a color :
| Code | Color | Description |
|---|---|---|
| 0 | Green | Good |
| 1 | Yellow | Moderate |
| 2 | Orange | Unhealthy for Sensitive Groups |
| 3 | Red | Unhealthy |
| 4 | Purple | Very Unhealthy |
| 5 | Maroon | Hazardous |
# Full Example
airquality.things:
Bridge airquality:api:main "Bridge" [apiKey="xxxyyyzzz"] {
station MyHouse "Krakow"[location="50.06465,19.94498", refresh=60]
}
airquality.items:
Group AirQuality <flow>
Number Aqi_Level "Air Quality Index" <flow> (AirQuality) { channel="airquality:station:local:aqi#index" }
Number Aqi_Pm25 "PM\u2082\u2085 Level" <line> (AirQuality) { channel="airquality:station:local:pm25#value" }
Number Aqi_Pm10 "PM\u2081\u2080 Level" <line> (AirQuality) { channel="airquality:station:local:pm10#value" }
Number Aqi_O3 "O\u2083 Level" <line> (AirQuality) { channel="airquality:station:local:o3#value" }
Number Aqi_No2 "NO\u2082 Level" <line> (AirQuality) { channel="airquality:station:local:no2#value" }
Number Aqi_Co "CO Level" <line> (AirQuality) { channel="airquality:station:local:co#value" }
Number Aqi_So2 "SO\u2082 Level" <line> (AirQuality) { channel="airquality:station:local:so2#value" }
DateTime Aqi_ObservationTime "Time of observation [%1$tH:%1$tM]" <clock> (AirQuality) { channel="airquality:station:local:aqi#timestamp" }
Number:Temperature Aqi_Temperature "Temperature" <temperature> (AirQuality) { channel="airquality:station:local:weather#temperature" }
Number:Pressure Aqi_Pressure "Pressure" <pressure> (AirQuality) { channel="airquality:station:local:weather#pressure" }
Number:Dimensionless Aqi_Humidity "Humidity" <humidity> (AirQuality) { channel="airquality:station:localweather#humidity" }
airquality.sitemap:
sitemap airquality label="Air Quality" {
Frame {
Text item=Aqi_Level valuecolor=[
Aqi_Level=="-"="lightgray",
Aqi_Level>=300="#7e0023",
>=201="#660099",
>=151="#cc0033",
>=101="#ff9933",
>=51="#ffde33",
>=0="#009966"
]
Text item=Aqi_Description valuecolor=[
Aqi_Description=="HAZARDOUS"="#7e0023",
=="VERY_UNHEALTHY"="#660099",
=="UNHEALTHY"="#cc0033",
=="UNHEALTHY_FSG"="#ff9933",
=="MODERATE"="#ffde33",
=="GOOD"="#009966"
]
}
Frame {
Text item=Aqi_Pm25
Text item=Aqi_Pm10
Text item=Aqi_O3
Text item=Aqi_No2
Text item=Aqi_Co
Text item=Aqi_So2
}
Frame {
Text item=Aqi_ObservationTime
Text item=Aqi_Temperature
Text item=Aqi_Pressure
Text item=Aqi_Humidity
}
}
airquality.rules:
rule "Change lamp color to reflect Air Quality"
when
Item Aqi_Description changed
then
var String hsb
switch Aqi_Description.state {
case "HAZARDOUS":
hsb = "343,100,49"
case "VERY_UNHEALTHY":
hsb = "280,100,60"
case "UNHEALTHY":
hsb = "345,100,80"
case "UNHEALTHY_FSG":
hsb = "30,80,100"
case "MODERATE":
hsb = "50,80,100"
case "GOOD":
hsb = "160,100,60"
}
Lamp_Color.sendCommand(hsb)
end