I am indeed also trying in // with the Community SmartThings App.
But there, I am missing the source “Display Port” (it works for HDMI 1 and HDMI 2).
The developer is kindly looking if he can retrieve the list of sources via the API instead of using an hardcoded list : [App][Pro] SmartThings Community (was the HCS version 2) - #261 by vletroye
