Humidity and Temperature Sensor Breakout - HTU21D (Open hardware)

4 years ago 683
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Description: The HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor. This sensor is ideal for environmental sensing and data logging and perfect for a weather stations or humidor control systems. All you need is two lines for I2C communication and you’ll have relative humidity readings and very accurate temperature readings as a bonus!

There are only four pins that need to be hooked up in order to start using this sensor in a project. One for VCC, one for GND, and two data lines for I2C communication. This breakout board has built in 4.7k pull up resistors for I2C communications. If you’re hooking up multiple I2C devices on the same bus, you may want to disable these resistors.

GitHub (Design Files & Example Code) GitHub (Library) Sparkfun link:

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Documents

HTU21D Breakout sch

HTU21D Breakout PCB

BOM

ID Name Designator Footprint Quantity
1 LOGO-SFE LOGO1 SFE-LOGO-FLAME 1
2 0.1uF C1 0603-CAP 1
3 4.7k R1,R2 0603-RES 2
4 SOLDERJUMPER_2WAY SJ1 SJ_3_PASTE123 1
5 STAND-OFF STANDOFF2,STANDOFF1 STAND-OFF 2
6 LOGO-SFE JP2 SFE-NEW-WEB 1
7 FIDUCIAL JP3,JP4 MICRO-FIDUCIAL 2
8 HTU21D U1 HTU21D 1
9 OSHW-LOGO LOGO2 OSHW-LOGO-S 1
10 FRAME-LETTER FRAME2 CREATIVE_COMMONS 1
11 M04 JP1 1X04 1

Attachments

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Members

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