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VIDEO: Track Temperature & Humidity with Silicon Labs Sensors

Symmetry Electronics Team in Blogs on October 18, 2017

About Symmetry Electronics Team

Established in 1998, Symmetry Electronics is a focused global distributor of wireless connectivity solutions, sensors, and audio-video technologies. Offering comprehensive design support and available-to-ship inventory, Symmetry is committed to helping engineers accelerate time to market, reduce costs, and offer modern solutions for their IoT designs. Acquired by the Berkshire Hathaway company TTI, Inc. in 2017, Symmetry Electronics is headquartered in Los Angeles with international offices in Mexico, Canada, and China.


In this video, Symmetry Electronics Application Engineer Tyler Wojciechowicz shows how to visualize sensor data in an easy to read on-screen GUI using a Silicon Labs Si7021 temperature and humidity sensor.

Bill of materials for this demo: Arduino Uno, Si7021, 10-pin DFN to DIP breakout, (2) male header pins, 10uF capacitor


Applications:

  • HVAC/R
  • Thermostats/humidistats
  • Respiratory therapy
  • White goods
  • Indoor weather stations
  • Micro-environments/data centers
  • Automotive climate control and defogging
  • Asset and goods tracking
  • Mobile phones and tablets


Key Features:

  • Precision relative humidity sensor
  • High accuracy temperature sensor
  • -10° to 85° C sensing capability
  • Low power consumption (150uA)
  • Factory-calibrated
  • Excellent long term stability
  • Optional factory-installed cover


Head on over to the official Arduino page to download the IDE:

Arduino Download


Then head to the tutorials page to learn more about how to use your Arduino:

Arduino Tutorials


If you haven’t used Processing before, you can download it here:

Processing Download


Then head to the tutorials page to learn more about how to use Processing:

Processing Tutorials


First wire up your Si7021 following this wiring diagram:



Next, download the example Arduino code here:

Arduino sketch


And download the example Processing code here:

Processing sketch


Once you have uploaded the Arduino code, start Processing and open the Processing example code. Change your COM port to match the COM port of your Arduino (see comments in code), and then run the processing code. If everything is wired up correctly and you have the correct COM port selected, you should see a live feed of your temperature and relative humidity.

All relative documents and manuals to the Si70211 can be downloaded from here:


SiLabs Manuals

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Symmetry Electronics Team in Blogs on October 18, 2017

About Symmetry Electronics Team

Established in 1998, Symmetry Electronics is a focused global distributor of wireless connectivity solutions, sensors, and audio-video technologies. Offering comprehensive design support and available-to-ship inventory, Symmetry is committed to helping engineers accelerate time to market, reduce costs, and offer modern solutions for their IoT designs. Acquired by the Berkshire Hathaway company TTI, Inc. in 2017, Symmetry Electronics is headquartered in Los Angeles with international offices in Mexico, Canada, and China.

Why partner with Symmetry Electronics? Symmetry's technical staff is specially trained by our suppliers to provide a comprehensive level of technical support. Our in-house Applications Engineers provide free design services to help customers early in the design cycle, providing solutions to save them time, money and frustration. Contact Symmetry for more information.

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