I’m still interested in hearing about any SmartThings-specific solutions for this, but meanwhile we were able to solve it for my friend using Apple HomeKit as the intermediary instead of IFTTT.
Turns out she has an android phone, which I knew, but also an Apple Watch, which I didn’t.
And her husband has both an iPhone and an Apple TV 4.
So…there are several energy reporting smart plugs, including one of the Kasa models, which can provide actionable energy reporting for an apple Home routine. But you can’t set it up in the Apple Home app—you have to use one of the various third-party apps which offer more trigger options. But then it’s pretty simple.
So… they got 2 Kasa plugs (HomeKit compatible with energy monitoring), plugged the dumb TV into one and put the other one into an empty socket to act as a proxy.
When the TV plug is drawing power, they used a HomeKit routine to turn on the other plug.
Both plugs are visible in smartthings for on/off status through the regular cloud to cloud integration.
And voila! They can create smartthings routines which trigger from the second plug being on or off, using it as a proxy for the TV plug drawing power.
It’s not elegant, but it should be reliable, and it’s relatively inexpensive.
So now I’d like to find a similar option which doesn’t require Apple HomeKit. Or Home Assistant. Or an edge driver.
Fingers crossed for the Shelly…
Tuya might have something, too, if their own app can trigger a rule based on energy use by a WiFi plug, but I don’t know if it can. Still researching…