WeatherCompany Binding - Solar Radiation

1

Hi all
I have installed last week a weather station (froggit wh2650) and send successfully data to ecowitt and wunderground.
The binding the weathercompany works well. So far so good.

in WS View (App) I can switch between “W/m²” and Lux.

But in the bindig (wunderground data) I receive only data in “W/m²”.
How can I receive the data in Lux or how can I stripe the “W/m²” from the data to work with it:

The declaration of the item
Number:Intensity WC_PWS_SolarRadiation “Sonneneinstrahlung [%.2f %unit%]” { channel=“weathercompany:weather-observations:xxxxxxx:currentSolarRadiation” }

I like to add a additional number item to work in rules for the shutters or the light.

Can somebody help me here?

BR Uwe

2

In a rule, you can strip the units like this:

(WC_PWS_SolarRadiation.state as Number).intValue
1 Like
3

// radiation in lux. 1 Lux = 0.0079 W/m²
var double lux = (radiation.state as DecimalType).doubleValue / 0.0079

btw you can get radiation from the astro binding, too.

1 Like
4

You know you can do this, right?

Number:Intensity ...  "Sonneneinstrahlung [%.2f lx]" { ...
5

This and the post from Markus was the solution, thanks Mark and Markus
var double Lux = (WC_PWS_SolarRadiation.state as Number).doubleValue / 0.0079

This will help me to implement this in my rules for switching lights and of course for the shutters. Hope that my solution pass the WAF :slight_smile:

6

unfortunaly not, this will only change the unit but the value is still the same. There is no conversion

7

Show us that in your events.log, when the Item is changed by the binding.

8

@rossko57 The units are different between these two. One is Intensity (Solar Radiation) and the other is Illuminance (Lux). Therefore, I’m not convinced the system will convert between the two.

9

I stand corrected; I (too) quickly googled and misread the quantity types!

10

It’s like Mark said, I have tried it and I do not get any value
even when I declare a item as following:
Number:Illuminance WC_PWS_SolarRadiationLX “Sonneneinstrahlung [%.0f lx]” { channel=“weathercompany:weather-observations:xxxxxxx:currentSolarRadiation” }

Nothing in the events.log for the item WC_PWS_SolarRadiationLX

BR Uwe

11

Yes, I have misled you.
If the binding provides a Number:Intensity type channel, you should link that to a Number:Intensity type Item.
Number:Intensity does not provide lux units,

1 Like
12

with the help from Mark I implement a rule where I convert the “W/m²” to Lux

rule "Watt to LUX"
when 
    Item WC_PWS_SolarRadiation changed
then
    var double Lux = (WC_PWS_SolarRadiation.state as Number).doubleValue / 0.0079
    WC_PWS_LUX.sendCommand(Lux)
end

This helps me to operate with the Lux-Value

BR Uwe

13

Glad you got it sorted out.

FTR it was @mstormi who provided the conversion formula.

14

This topic was automatically closed 41 days after the last reply. New replies are no longer allowed.