HAT ENV is able to detect the temperature, humidity, air pressure, and magnetic field. This product relates via I2C protocol which allows you to obtain 4 types of environment data thru just 2-pin. With the tiny body, it makes the HAT a powerful application for environmental data collecting.
Note:
This HAT is actually an add-on unit for M5StickC controller. The controller is NOT INCLUDED in the package.
If you're interested to get other M5Stack cores, modules, units, and HATs in your hand for a lot more fun projects, you may get them here.