===== Temperature and Humidity Sensor ====== Si7021 is an integrated sensor that measures both temperature and relative humidity with good accuracy. The resolution of measured parameters can be selected through software between 8-12 bits for humidity and 12-14 bits for temperature. The sensor uses a digital I2C interface for data transmission, so we can easily interface with it using the Wire library. {{ :si7021.png?800 |}} We will need to use a dedicated library written specially for it. Download the library from {{::sht2x.zip| here}} and unzip its contents into the folder named //Arduino\libraries// or use Arduino IDE's Add ZIP Library command. Next tutorial will teach you how to implement a [[tutorials_barometer|barometer]]!