EYE on NPI – TE HTU31 Humidity and Temperature Sensor #EyeOnNPI #DigiKey #Adafruit @TEConnectivity @DigiKey
We’ve noticed a lot of sensor-making companies doing a refresh on their offerings at the end of this year, and we are here for it!
The TE HTU31 (video) is the next-gen version of the very popular HTU21D, which, whaddyaknow, we even make a breakout for.
The original ’21 version of this sensor came with +/-3% RH tolerance @55% RH which has improved in the HTU31 series to a typical accuracy of ±2%RH and ±0.2°C which makes it an excellent sensor for all sorts of environmental uses at a very attractive price of about $2 each in quantity.
Things we like about this sensor: it’s got a easy to pick-and-place package, 3 to 5V DC power input and GPIO compatibility, data comes in over I2C with a CRC and is easy to calculate the final temperature/humidity. There’s just enough extras and knobs to be useful: soft reset, oversampling, heater enable/disable, unique serial number, but not so many it’s overwhelming. It does what it says and without a lot of fuss!
We were able to get it working with our Arduino-compatible (code) in about an hour.
While the package is the same size as the HTU21, the pinout has changed. There’s now a hardware reset pin and address-select pin, so you can pick from 2 addresses (or, say have two sensors on one bus). At the time, as of this writing, there’s no version with the PTFE filter on top, which we really liked on the HTU21 – hopefully that version will come along shortly.
This sensor also comes in an analog-output version, the HTU31V. We find this interesting because we don’t usually see analog-output sensors. The analog version comes in the same package, can run from 3 to 5V and has two ratiometric outputs – so as long as your ARef is the same as the power pin, you’ll have as much precision as your microcontroller provides on an analog input. Could be useful for instant-feedback systems that you don’t want a microcontroller involved in.
The HTU31D are in stock right now, available in both reels of 400 pcs and also reels of 150 pcs – same product just different final packaging. TE makes very fine sensors, so pick up a few today for delivery.
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat and our Discord!
Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: Open Hardware is In, New CircuitPython and Pi 5 16GB, and much more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi
EYE on NPI – Adafruit Daily — EYE on NPI Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
