# Smhi Binding

This binding gets hourly and daily forecast from SMHI - the Swedish Meteorological and Hydrological Institute. It can get forecasts for the nordic countries (Sweden, Norway, Denmark and Finland).

# Supported Things

The binding support only one thing-type: forecast. The thing can be configured to get hourly forecasts for up to 24 hours, and daily forecasts for up to 10 days.

# Discovery

This binding does not support automatic discovery.

# Thing Configuration

The forecast thing needs to be configured with the latitude and longitude for the location of the forecast. You can also choose for which hours and which days you would like to get forecasts.

Parameter	Description	Required
Latitude	Latitude of the forecast	Yes
Longitude	Longitude of the forecast	Yes
Hourly forecasts	The hourly forecasts to display	No
Daily forecasts	The daily forecasts to display	No

# Channels

The channels are the same for all forecasts, but the daily forecast provides some additional aggregated values. For the other daily forecast channels, the values are for 12:00 UTC.

The complete channel identifier is the channel group id (hour_<offset> or day_<offset>, where offset is 0 for the current hour/day or the number of hours/days from now) + the channel id, concatenated with a #.

Examples:

Temperature for the current hour: hour_0#t
Total precipitation 3 days from now: day_3#ptotal

# Basic channels

channel	type	channel id	description
Temperature	Number:Temperature	t	Temperature in Celsius
Max Temperature	Number:Temperature	tmax	Highest temperature of the day (daily forecast only)
Min Temperature	Number:Temperature	tmin	Lowest temperature of the day (daily forecast only)
Wind direction	Number:Angle	wd	Wind direction in degrees
Wind Speed	Number:Speed	ws	Wind speed in m/s
Max Wind Speed	Number:Speed	wsmax	Highest wind speed of the day (daily forecast only)
Min Wind Speed	Number:Speed	wsmin	Lowest wind speed of the day (daily forecast only)
Wind gust speed	Number:Speed	gust	Wind gust speed in m/s
Minimum precipitation	Number:Speed	pmin	Minimum precipitation intensity in mm/h
Maximum precipitation	Number:Speed	pmax	Maximum precipitation intensity in mm/h
Total precipitation	Number:Length	ptotal	Total amount of precipitation during the day, in mm (daily forecast only)
Precipitation category*	Number	pcat	Type of precipitation
Air pressure	Number:Pressure	msl	Air pressure in hPa
Relative humidity	Number:Dimensionless	r	Relative humidity in percent
Total cloud cover	Number:Dimensionless	tcc_mean	Mean value of total cloud cover in percent
Weather condition**	Number	wsymb2	Short description of the weather conditions

# Advanced channels

channel	type	channel id	description
Visibility	Number:Length	vis	Horizontal visibility in km
Thunder probability	Number:Dimensionless	tstm	Probability of thunder in percent
Frozen precipitation	Number:Dimensionless	spp	Percent of precipitation in frozen form (will be set to UNDEF if there's no precipitation)
Low level cloud cover	Number:Dimensionless	lcc_mean	Mean value of low level cloud cover (0-2500 m) in percent
Medium level cloud cover	Number:Dimensionless	mcc_mean	Mean value of medium level cloud cover (2500-6000 m) in percent
High level cloud cover	Number:Dimensionless	hcc_mean	Mean value of high level cloud cover (> 6000 m) in percent
Mean precipitation	Number:Speed	pmean	Mean precipitation intensity in mm/h
Median precipitation	Number:Speed	pmedian	Median precipitation intensity in mm/h

* The precipitation category can have a value from 0-6, representing different types of precipitation:

Value	Meaning
0	No precipitation
1	Snow
2	Snow and rain
3	Rain
4	Drizzle
5	Freezing rain
6	Freezing drizzle

** The weather condition channel can take values from 1-27, each corresponding to a different weather condition:

Value	Condition
1	Clear sky
2	Nearly clear sky
3	Variable cloudiness
4	Half clear sky
5	Cloudy sky
6	Overcast
7	Fog
8	Light rain showers
9	Moderate rain showers
10	Heavy rain showers
11	Thunderstorm
12	Light sleet showers
13	Moderate sleet showers
14	Heavy sleet showers
15	Light snow showers
16	Moderate snow showers
17	Heavy snow showers
18	Light rain
19	Moderate rain
20	Heavy rain
21	Thunder
22	Light sleet
23	Moderate sleet
24	Heavy sleet
25	Light snowfall
26	Moderate snowfall
27	Heavy snowfall

# Full Example

# demo.things

Thing smhi:forecast:demoforecast "Demo forecast" [ latitude=57.997072, longitude=15.990068, hourlyForecasts=0,1,2, dailyForecasts=0,1 ]

# demo.items

Number:Temperature Smhi_Temperature_Now "Current temperature [%.1f °C]" {channel="smhi:forecast:demoforecast:hour_0#t"}
Number:Speed Smhi_Min_Precipitation_Now "Current precipitation (min) [%.1f mm/h]" {channel="smhi:forecast:demoforecast:hour_0#pmin"}

Number:Temperature Smhi_Temperature_1hour "Temperature next hour [%.1f °C]" {channel="smhi:forecast:demoforecast:hour_1#t"}
Number:Speed Smhi_Min_Precipitation_1hour "Precipitaion next hour (min) [%.1f mm/h]" {channel="smhi:forecast:demoforecast:hour_1#pmin"}

Number:Temperature Smhi_Temperature_Tomorrow "Temperature tomorrow [%.1f °C]" {channel="smhi:forecast:demoforecast:day_1#t"}
Number:Speed Smhi_Min_Precipitation_Tomorrow "Precipitaion tomorrow (min) [%.1f mm/h]" {channel="smhi:forecast:demoforecast:hour_1#pmin"}

# demo.sitemap

sitemap demo label="Smhi" {
    Frame label="Current weather" {
        Text item=Smhi_Temperature_Now
        Text item=Smhi_Min_Precipitation_Now
    }
    Frame label="Weather next hour" {
        Text item=Smhi_Temperature_1hour
        Text item=Smhi_Min_Precipitation_1hour
    }
    Frame label="Weather tomorrow" {
        Text item=Smhi_Temperature_Tomorrow
        Text item=Smhi_Min_Precipitation_Tomorrow
    }
}

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