I know this is an older thread, but just wanted to ask if anyone else is using ST with a Wemo Maker to roughly the same effect as they might with an Arduino ST Shield. I just got the Wemo Maker (Connect) app here: [RELEASE] Wemo Maker
I’ve been wanting to hook up a waterproof temp probe (for a hot tub) that could then trigger smart things to turn off a Leviton wall outlet that the hot tub is plugged into. I have a problem with my tub getting overheated (which is also a big waste of power, and annoying when I can’t get in for fear of third degree burns 
) I was planning on using the shield for this, but just started playing with the Maker.
My current issue I’m trying to resolve is whether the Maker device and Smartapp alone can do this. I also want the outlet to come back on when the water temp is low enough again. At this point, I’m pretty sure I’m going to need to insert an Arduino between the temp probe and the Maker to handle the logic, then send the correct voltage values to the Maker, which will then trigger the ST routine to turn off/on the tub. I would just love to have the Shield, and eliminate the Maker from the picture. What a pity it’s been discontinued. Someone else needs to make those, and sell them on amazon. Seems like there’s good demand from everything I’ve read. In any case, I hope this all works! Thanks for all the great info and links in this thread. Super helpful.
cheers,
Jeremy