There's something wrong with your link. It links back to this thread.
I'm having issues with the Output switched on/off URL aswell. I have tried with both a local https-url, a local http-url and an external website (https://webhook.site) and neither register anything from the three devices I have tested (Plug S and Shelly1 and Shelly2). The URLs work fine when tested in a browser.
Am I wrong to believe that the URL should be accessed every time the plug/relay is switched on/off regardless if it's triggered from the physical lamp button, through the app or through the Shelly URL API?
/L
I just unpacked my first Shelly Plug S and can confirm the same issue. Thanks for the tip! I will try it tomorrow.
/L
