Streamdeck control of ATEM WITHOUT Companion app

I regularly use the Companion app to control my ATEM switcher and other BM devices. This is great, however, recently I had to control Powerpoint with my Streamdeck (it does this nicely) but still needed to control the ATEM. I can't find any way to control my ATEM with Streamdeck alone (NOT using Companion).
Any suggestions?
BTW: Companion does NOT control Powerpoint without some "odd ball" plugin, which doesn't work.
All help is greatly appreciated.
Any suggestions?
BTW: Companion does NOT control Powerpoint without some "odd ball" plugin, which doesn't work.
All help is greatly appreciated.