Here is a smart sensor that lets you monitor temperature and humidity in your home, RV, refrigerator, and everywhere else. The tempCube is a WiFi connected sensor that sends you e-mail and text alerts. It comes with iOS and Android connectivity.
The tempCube has a temperature range of -22 to 140F and can detect humidity from 30 to 100% RH. You don’t need a subscription to use this sensor. tempCube is powered by a rechargeable battery but can also be USB powered.