{"product_id":"adafruit-htu21d-f-temperature-humidity-sensor-breakout-board-stemma-qt","title":"Adafruit HTU21D-F Temperature \u0026 Humidity Sensor Breakout Board (STEMMA QT)","description":"\u003cp\u003eIt's summer and you're sweating and your hair's all frizzy and all you really want to know is why the weatherman said this morning that today's relative humidity would max out at a perfectly reasonable 52% when it feels more like 77%. Enter the \u003cstrong\u003eHTU21D-F Temperature + Humidity Sensor\u003c\/strong\u003e - the best way to prove the weatherman wrong!\u003cbr\u003e\u003cbr\u003eThis I2C digital humidity sensor is an accurate and intelligent alternative to the much simpler Humidity and Temperature Sensor - SHT15 Breakout It has a typical accuracy of ±2% with an operating range that's optimized from 5% to 95% RH. Operation outside this range is still possible - just the accuracy might drop a bit. The temperature output has an accuracy of ±1°C from -30~90°C. If you're looking to measure temperature more accurately, we recommend the MCP9808 High Accuracy I2C Temperature Sensor Breakout Board.\u003cbr\u003e\u003cbr\u003eSuch a lovely chip - so we spun up a breakout board that includes the Filtered version (the white bit of plastic which is a PTFE filter to keep the sensor clean), a 3.3V regulator and I2C level shifting circuitry. This lets you use it safely with any kind of microcontroller with 3.3V-5V power or logic.\u003c\/p\u003e\n\u003cp\u003eTo get you going fast, we spun up a custom-made PCB in the \u003cstrong\u003eSTEMMA QT\u003c\/strong\u003e form factor, making them easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the LIS331s or to chain them with a wide range of other sensors and accessories using a \u003cstrong\u003ecompatible \u003c\/strong\u003e\u003cstrong\u003ecable\u003c\/strong\u003e. \u003cstrong\u003eQT Cable is NOT included, but we have a variety in the shop\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eEach order comes with one fully assembled and tested PCB breakout and a small piece of header. You'll need to solder the header onto the PCB to use in a breadboard but it's fairly easy and takes only a few minutes even for a beginner.\u003cbr\u003e\u003cbr\u003eIt's also very easy to use, thanks to our Arduino library and tutorial. Check out our tutorial for pinouts, wiring, files, etc.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cstrong\u003eRevision History\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of September 4th, 2024\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- we've updated this PCB with \u003cstrong\u003eAdafruit Pinguin\u003c\/strong\u003e to make a lovely and legible silkscreen - you may get the new PCB or the older version with vector fonts - both are identical other than the fancy silkscreen. Additionally, this sensor breakout may come with black or tan STEMMA QT connectors. They work the same!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of March 23, 2021 - \u003c\/strong\u003ewe've updated this sensor to be STEMMA QT compatible - which means there's now an easy way to plug and play this sensor without any soldering! The physical shape has changed a little, and the pinout has changed to our QT standard ordering.\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eI2C 7-bit address 0x40\u003c\/li\u003e\n\u003cli\u003eProduct Dimensions: 25.5mm x 17.0mm x 5.0mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cdiv class=\"panel-collapse collapse in\" id=\"tab-technical-details-content\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-lg-12 col-md-12 col-sm-12 col-xs-12\"\u003e\n\u003cul\u003e\n\u003cli\u003ePrimary Guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cul id=\"product-files\"\u003e\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":48620783894750,"sku":"bka1787257285550","price":7.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/0705\/9422\/files\/adafruit-htu21d-f-temperature-humidity-sensor-breakout-board-stemma-qt_1.jpg?v=1787257294","url":"https:\/\/primewearfashion.shop\/products\/adafruit-htu21d-f-temperature-humidity-sensor-breakout-board-stemma-qt","provider":"My Store","version":"1.0","type":"link"}