Rollershutter position reading problem

Setup, Configuration and Use Items & Sitemaps
1

Hi,
While creating the roller shutter element I wanted to show its position, such information is in the returned JSON. Unfortunately, I can’t read it even though the code seems to be correct. Any suggestions? At the begining I wanted to show the value inside rollershutter item, finally I created a new one.

json:
{"shutter":{"state":2,"currentPos":{"position":88,"tilt":-1},"desiredPos":{"position":88,"tilt":-1},"favPos":{"position":50,"tilt":50}}}

items:
Rollershutter S_Room "Pokój []" <rollershutter> (Shutters) { http=">[DOWN:GET:http://192.168.0.120/s/d] >[STOP:GET:http://192.168.0.120/s/s] >[UP:GET:http://192.168.0.120/s/u]" }
Dimmer S_Room_Position "Pozycja [%d %%]" <rollershutter> { http=">[http://192.168.0.120/api/shutter/state:3000:JSONPATH($.shutter.desiredPos.position)]" }

sitemap:
Slider item=S_Room_Position

2

> means outward bound
If you’re trying to read, you should consider <

1 Like
3

Bull’s-eye!

That is complete code, one thing is enough for manipulate and read position:
Rollershutter S_Room "Pokój []" <rollershutter> (Shutters) { http=">[DOWN:GET:http://192.168.0.120/s/d] >[STOP:GET:http://192.168.0.120/s/s] >[UP:GET:http://192.168.0.120/s/u] <[http://192.168.0.120/api/shutter/state:3000:JSONPATH($.shutter.desiredPos.position)]" }

Thank you!

4

Hi
i have a dimmer “DimmerCam”.
If i wanto to use this code i must replace S_Room with DimmerCam and 192.168.0.120 with the mine.
Is it true?
Other?

5

Do you use blebox.eu dimmer module? Dimmer has different api and do not need DOWN/UP/STOP commands( https://technical.blebox.eu/dimmerBoxAPI/). So, you should read currentBrightness and set desiredBrightness on change. The code for dimmer should look like this:

http.cfg:
room.url=http://YOUR_IP/api/dimmer/state
room.updateInterval=3000

items:
Dimmer ITEM_NAME "LABEL [%d %%]" <light> (Lights) { http="<[room:3000:JS(brightness.js)]" }

transform/brightness.js (to calculate percent for dimmer item because source brightness value is between 0-255):
(function(value) {
var brightness_val = JSON.parse(value).dimmer.desiredBrightness;
var brightness_percent = Math.round((brightness_val / 255) * 100);
return brightness_percent;
})(input)

sitemap:
Frame label="Lights" {
Group item=Lights {
Switch item=ITEM_NAME label="LABEL []" icon="switch"
Slider item=ITEMNAME label="LABEL [%d %%]"
}
}

It is only for status read, to POST changes you should bind outbound in item http or use a rule.

6

No
I’d want to do the same you did but i use a dimmer to open a blind.
I can see the dimmer but i am not able to see the state in %.

image
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In the openhab panel i have

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7

What kind of equipment do you actually use and where is the api documentation?

If you can not bind http directly for an item, do it with rule, like that:
rule "My shutter"
when
Item Dim received command
then
val String URL = "http://IP/api/shutter/set - check your api"
val String contenttype = "application/json"
var String jsondata = '{"shutter": {"position": ' + Dim.state + '}} - check your json structure'
sendHttpPostRequest(URL, contenttype, jsondata)
logInfo("rshutter.rules", "Dimm position set to " + Dim.state)
end

At least, consider use rollershutter item in place of dimmer.

8

This is simple bind for dimmer item controling shutter:
Dimmer YOUR_ITEM "LABEL [%d %%]" <rollershutter> { http=">[*:GET:http://YOUR_IP/API/%2$s] <[http://YOUR_IP/API/state:3000:JSONPATH(target position)]" }

This one >[*:GET:http://YOUR_IP/API/%2$s] send new position to shutter controller, %2$s means dimmer position
Next one: <[http://YOUR_IP/API/state:3000:JSONPATH($.shutter.desiredPos.position)] is an example of read target position. You should read the target position, if you have one, not the current one (current = loops). $.shutter.desiredPos.position depends on the structure of your json respond.

If won’t work restart openhab service: sudo systemctl restart openhab2.service.

9

Actually my sitemap is

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the file is

sitemap sonoff label="CAMERETTA" {
    Frame {
        Group item=Cameretta  {
   
    Frame {
       // Text label="Serranda Discesa" icon="Blinds" {
            Default item=LivingRoom_Light2 label="Discesa" icon="Blinds"
       // }

       // Text label="DimmerCam" icon="heating" {
            Default item=DimmerCam label="DimmerCam" icon="heating"
      //  }

       // Text label="Serranda Salita" icon="Blinds" {
            Default item=LivingRoom_Light1 label="Salita" icon="Blinds"
        //}
      //  Text label="Reset finestra alzata" icon="switch" {
            Default item=Reset label="Reset" icon="switch"
        //}
//Frame label="Lights" {
//Group item=Lights {
//Switch item=DimmerCam label="LABEL []" icon="switch"
//Slider item=DimmerCam label="LABEL [%d %%]"
//}
//}
		
}
}
}
}

But i don’t understand why on the habpanel the status of the switch works instead on the sitemap no.
Infact on the sitemap when a switch go off i am not able to see this switch.
Why?

10

You do not need another Frame in Group. What is in your item config for that dimmer?

11

DimmerCam

12

i modified so but i continue to have the problem

sitemap sonoff label="CAMERETTA" {
    Frame {
        Group item=Cameretta  {
   
  //  Frame {
       // Text label="Serranda Discesa" icon="Blinds" {
            Default item=LivingRoom_Light2 label="Discesa" icon="Blinds"
       // }

       // Text label="DimmerCam" icon="heating" {
            Default item=DimmerCam label="DimmerCam [%d %%]" icon="heating"
      //  }

       // Text label="Serranda Salita" icon="Blinds" {
            Default item=LivingRoom_Light1 label="Salita" icon="Blinds"
        //}
      //  Text label="Reset finestra alzata" icon="switch" {
            Default item=Reset label="Reset" icon="switch"
        //}
//Frame label="Lights" {
//Group item=Lights {
//Switch item=DimmerCam label="LABEL []" icon="switch"
//Slider item=DimmerCam label="LABEL [%d %%]"
//}
//}
		
//}
}
}
}
13

now i eliminated the group and it works.
But if i want to create a group how can i do to have the status in real time?

14

I described it 2h ago. You have to configure an item in items. This part read the value <[http://YOUR_IP/API/state:3000:JSONPATH(target position)].

1 Like
15

Ok thank’s

16

If i want in sitemap more rooms, how do i create this with the dimmer to work?

17

Please read the documentation at: https://www.openhab.org/docs/configuration/sitemaps.html.

This is an example: Text item=LR_Multimedia_Summary label="Multimedia [%s]" icon="video" {
Selection item=LR_TV_Channel mappings=[0="off", 1="DasErste", 2="BBC One", 3="Cartoon Network"]
Slider item=LR_TV_Volume
}