Adafruit HTU31D Humidity/Temp Sensor for Arduino 
This is a library for the HTU31D Humidity + Temperature sensor.
Designed specifically to work with the HTU31D in the Adafruit shop:
These boards use I2C to communicate. 2 pins are required to interface. Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution.
Installing this Library
Check out the links above for our tutorials and wiring diagrams. Use the Arduino library manager to install
We also have a great tutorial on Arduino library installation at: http://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use