Humidifier for mini fridge?

People certainly do something similar, but with other devices. We have one community member who has a cheese cave, a number who have brewing equipment, and at least one who has a meat dryer. They use different humidity sensors to turn various equipment on and off.

As far as the specific one that you are using now, there’s no direct integration with smartthings.

I see from the company FAQ that they are considering an eventual echo or IFTTT integration, but don’t have one yet. So there really isn’t a lot of integration possible at this time.

Are you using an iOS phone or an android phone? There might be a way to capture the notifications and do something with that, but it just depends on the exact details.

Here’s a recent example of one of the projects I was talking about (this is a clickable link)