There's already some competition in this space. Digi and Exosite are two examples I named. There's also Helium, co-founded by Shawn Fanning so they get a lot of press for a solution that (imo) isn't fully complete.

So what makes things more complicated is moving to the next step: two-way data. Let's say it's not a fridge now but an oven, loaded with data pushed down from the cloud by a chef at the restaurant's corporate HQ. Recipes. Holding times. Training videos. I'm not quite sure a major restaurant chain wants this data on a server out of their control. It's something I'm still trying to understand from my customers.