NOTE: This product has been retired from our catalog. If you are looking for more up-to-date info, please check out some of these resources to see how other users are still hacking and improving on this product.

We recommend looking at the Si7021, which is a drop-in replacement for the HTU21D. It uses the same address and methods to read the sensor.

SparkFun Humidity and Temperature Sensor Breakout - HTU21D

SparkFun Humidity and Temperature Sensor Breakout - HTU21D (SEN-12064)

This is a breadboard friendly breakout board for the Measurement Specialties high-precision, low-power digital humidity sensor.

Repository Contents

/Firmware - Example code
/Hardware - Eagle design files (.brd, .sch)
/Libraries - Libraries for use with the
/Production - Production panel files (.brd)

Documentation

Library - Arduino library for the HTU21D.
Hookup Guide - Basic hookup guide for the HTU21D.
SparkFun Fritzing repo - Fritzing diagrams for SparkFun products.
SparkFun 3D Model repo - 3D models of SparkFun products.

License Information

This product is open source!

The hardware is released under Creative Commons ShareAlike 4.0 International.

The code is beerware; if you see me (or any other SparkFun employee) at the local, and you’ve found our code helpful, please buy us a round!

Please use, reuse, and modify these files as you see fit. Please maintain attribution to SparkFun Electronics and release anything derivative under the same license.

Distributed as-is; no warranty is given.

Your friends at SparkFun.