We use a Ring camera to watch temperatures and humidity. The entry door is at the left of the refrigerator so it notifies us if anyone enters.
It has two way talk.
Occasionally it sends motion notifications if there is a sudden change in lighting but otherwise works well.
We're parked at home and it's connected to home wi-fi via an extender.
On the road we connect to a hotspot when we go off someplace in the car.