So, I imagine that your AC and HWT is already connected to ST? If you could look at ActionTiles to give access only to the AC and HWT. Small price to pay for such an excellent product!
Below is an example of limited access to devices. I have over 300 but this one Tile only gives access to three devices.
One time fee per hub, not per device. There’s a free trial period.
It’s a very popular app.
That said, I’m a little confused. Do you already have the hot water and air conditioner automated, or does that require a person to go in and do it?
Because all actiontiles gives you is a more customizable interface to your SmartThings account. So it can’t do anything you can’t already do with your SmartThings app except for some UI features like putting a pin code on the app itself.
And as far as the phone flasher thing, wouldn’t it then turn on the devices anytime you got a phone call? I guess I’m just not quite understanding the details of the use case.
Is this in the US. You may be able to create a IFTTT trigger to on a voicemail left at IFTTT from a number to activate a certain switch.
The idea being you would have the IFTTT recipie piece trigger a virtual switch in Smartthings. That virtual switch(or physical if your devices have the ability) would turn on your AC and HWT when tripped.
You would just need to know the number they would call from
You could try and vibration sensor and attach it to the phone, would probably need a phone with an old fashion bell ringer. There are some bed shaker devices out there. They would probably set off a vibration sensor.
so you are trying to turn it on upon your rental notification for the date the renter would enter in?
Then a smartapp small developement could do the trick.
you have to find a way to forward the notification to somewhere you can query via a http req from a smartapp
write a smartapp to poll this site and set the swtiches on upon booking starts minus few hours I guess to the water is hot when the renter comes in and switch off upon the rental elapses.