Try this @ei_Gelb_Geek and @Gad_Ofir it’s even simpler
https://www.icloud.com/shortcuts/bdf7b90a39834bde8bd9b5e0b98f7c74
If you first add it will automatically ask you for your openhab instance name and the item name. After that you have a ready to go on/off shortcut widget. (You have to scroll to the bottom and tap add untrusted shortcut, than it asks you)
Maybe useful and saves time.
Best regards Johannes
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