HTTP Binding/ REST Interface

[karsten.k...@gmail.com]

Hi,

i need to duplicate my openhab to be able to control my Helios HWL.

I could read the items using http binding to REST interface from air ventilation OH.

If i want to change a status on the air ventilation system using the main OH interface - how could i do this using rest?

Challenge is that i need to change the speed using a "Dimmer" item.

Any idea/ suggestion?

Cheers and Thanks

Karsten

[dan cunningham]

Hi Karsten, there are some good examples at https://github.com/openhab/openhab/wiki/Samples-REST.  Have you tried sending a POST with the dimmer value (say 50) to something like:

http://localhost:8080/rest/items/Temperature_FF_Office/state

 or a GET to :

http://localhost:8080/CMD?Temperature_FF_Office=50

https://github.com/openhab/openhab/wiki/REST-API

https://github.com/openhab/openhab/wiki/Samples-REST

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[watou]

The REST API wiki page says you need to use the HTTP PUT verb to update an item's state, but HTTP POST to send a command.  Is the wiki page incorrect or incomplete?

[dan cunningham]

Sorry, it should be a PUT to change the state directly in the first example, its a POST to send a command to the item (vs changing the /state directly)

 

On Wed, Jul 1, 2015 at 8:31 AM, watou <jo...@cocu.la> wrote:

The REST API wiki page says you need to use the HTTP PUT verb to update an item's state, but HTTP POST to send a command.  Is the wiki page incorrect or imcomplete?

To view this discussion on the web visit https://groups.google.com/d/msgid/openhab/db867f92-16c1-43a3-9cfd-7d5ce9e17afe%40googlegroups.com.

[dan cunningham]

One last thing ;-)  If the item is bound to something (like zwave, gpio, ect...) you probably want to send a command vs changing the state. 

[karsten.k...@gmail.com]

Hi

thanks for your help already.

I am advancing further :)

I could send commands and as well grep data from Rest Interface.

Now I have following Scenario - based on a rule i want to send different values towards the rest interface. Tule looks like

rule "Helios Geschwindigkeit setzen"
when
 Item SetKWLFanStatusgHelper changed  
then
    if (SetKWLFanStatusHelper.state instanceof DecimalType) {
        var value = SetKWLFanStatusHelper.state as DecimalType
        logDebug("heating", "Received HVAC status " + value)
        if (value == 3) {
            postUpdate(SetKWLFanStatus, 3)
        }
        else if (value == 2) {
            postUpdate(SetKWLFanStatus, 2)
        }
        else if (value == 1) {
            postUpdate(SetKWLFanStatus, 1)
        }
    }
end

I thought something like this should work:

Number SetKWLFanStatus "Ventilation Speed" <vent_ventilation_level_3> { http=">[1:http://192.168.1.16:8080/CMD?kwlFan=1] >[2:http://192.168.1.16:8080/CMD?kwlFan=2] >[3:http://192.168.1.16:8080/CMD?kwlFan=3]" }

Unfortunately it doesnt. How other would that work - to not use 8 different switches.

Thx & Cheers

Karsten

[Thomas Eichstädt-Engelen]

Hi Karsten,

according to https://github.com/openhab/openhab/wiki/Http-Binding the configured commands are lacking the HTTP VERB. Please try 

Number SetKWLFanStatus "Ventilation Speed"  <vent_ventilation_level_3> { http=">[1:POST:http://192.168.1.16:8080/CMD?kwlFan=1] >[2:POST:http://192.168.1.16:8080/CMD?kwlFan=2] >[3:POST:http://192.168.1.16:8080/CMD?kwlFan=3]" }

and post the according snippets of the openhab.log.

Thanks, Thomas E.-E.

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