Change item state of innogy SmartHome device


I’m trying to change the state of an item via the REST API.
I can control the item via the PaperUI interface and the innogy SmartPlug changes its state.

But if I try to change the state via the following REST requests then the device does not react.

$ curl -X PUT --header "Content-Type: text/plain" --header "Accept: application/json" -d "ON" "http://localhost:8080/rest/items/PSSSmartplugRo_Switch/state"

$ curl -X PUT --header "Content-Type: text/plain" --header "Accept: application/json" -d "OFF" "http://localhost:8080/rest/items/PSSSmartplugRo_Switch/state"

I receive a 202 Accepted response and the PaperUI also indicated the change but the device does not switch.

I’m using the following versions:
openhab2 / 2.3.0-1
http://localhost:8080/rest - “version”: “1”
REST Documentation / misc-restdocs - 2.3.0
innogy Smarthome Binding / binding-innogysmarthome - 2.3.0


If I send a command to an item

curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "ON" "http://localhost:8080/rest/items/PSSSmartplugRo_Switch"

I get response code 200
Version 2.3.0-1

Thank you!

I have used the wrong endpoint
PUT /items/{itemname}/state
instead of
POST /items/{itemname}

Marke as solved please.