Blink support discontinued!

When you say “Master Switch” do you mean the one in the Blink App as it does that without IFTTT

In the Blink App, bottom right, there’s an “Arm/Disarm” slider control. That’s the only thing that IFTTT can poke it seems.

How did you add simulated switch to ST as I dont understand that bit IFTTT doesnt work for me

This should help: