{"product_id":"adafruit-aht20-temperature-humidity-sensor-breakout-board-stemma-qt-qwiic","title":"Adafruit AHT20 Temperature \u0026 Humidity Sensor - STEMMA QT","description":"\u003cdiv class=\"product-copy\"\u003e\n  \u003cstyle\u003e\n    .product-copy{line-height:1.7;color:#1f2937}\n    .product-copy \u003e * + *{margin-top:1rem}\n    .product-copy h2{margin:1.4em 0 .6em;color:#111827}\n    .product-copy h3{margin:1.1em 0 .5em;color:#111827}\n    .product-copy p{margin:0 0 1em}\n    .product-copy ul,.product-copy ol{margin:0 0 1.2em 1.2em}\n    .product-copy li{margin:.35em 0}\n    .product-copy table{width:100%;border-collapse:collapse;margin:1.2em 0}\n    .product-copy table th,.product-copy table td{border:1px solid #e5e7eb;padding:.7em .8em;text-align:left;vertical-align:top}\n    .product-copy table th{background:#f9fafb;width:32%}\n    .product-copy .faq-list{margin:1.2rem 0 1.4rem}\n    .product-copy .faq{border:1px solid #e5e7eb;border-radius:12px;padding:.85rem 1rem;margin:.6rem 0;background:#fafafa}\n    .product-copy .note{background:#f8fafc;border-left:4px solid #2563eb;padding:.85rem 1rem;border-radius:8px}\n  \u003c\/style\u003e\n\n  \u003ch2\u003eSimple, Reliable Temperature and Humidity Sensing for Modern Builds\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The \u003cstrong\u003eAdafruit AHT20 Temperature \u0026amp; Humidity Sensor Breakout Board - STEMMA QT \/ Qwiic\u003c\/strong\u003e\n    is a compact digital sensor made for projects that need easy, dependable environmental readings without the quirks\n    of older one-wire sensors. If you want a cleaner alternative to traditional hobby humidity sensors, the AHT20 is a\n    great fit for monitoring air temperature and relative humidity in indoor projects, enclosures, and data loggers.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Because it uses a standard \u003cstrong\u003eI2C interface\u003c\/strong\u003e, it is easy to connect to Arduino-compatible boards,\n    Raspberry Pi, Feather boards, and other microcontrollers. Adafruit has already added the support circuitry and\n    STEMMA QT \/ Qwiic connectors, so setup is fast whether you prefer header pins or solderless QT cabling.\n  \u003c\/p\u003e\n\n  \u003cdiv class=\"note\"\u003e\n    \u003cstrong\u003eImportant:\u003c\/strong\u003e This sensor uses a single fixed \u003cstrong\u003eI2C address\u003c\/strong\u003e, so it is not the best choice\n    if you need multiple AHT20 sensors on the same I2C bus. For quick plug-and-play wiring, use a\n    \u003ca href=\"\/search?q=STEMMA+QT+cable\"\u003eSTEMMA QT cable\u003c\/a\u003e, sold separately.\n  \u003c\/div\u003e\n\n  \u003ch3\u003eWhy you'll love it\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEasy digital interface:\u003c\/strong\u003e Uses standard I2C for simple wiring and fast integration\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eModern temp + humidity sensing:\u003c\/strong\u003e A cleaner choice for many projects than older hobby sensor modules\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e3.3V and 5V friendly:\u003c\/strong\u003e Works with a wide range of maker boards\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSTEMMA QT \/ Qwiic ready:\u003c\/strong\u003e Great for fast no-solder prototyping\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCompact breakout design:\u003c\/strong\u003e Small enough for portable, embedded, and enclosure builds\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGood general-purpose accuracy:\u003c\/strong\u003e Well suited for room monitoring, logging, and automation projects\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat you can build\u003c\/h3\u003e\n  \u003cp\u003e\n    This breakout is ideal for indoor climate monitors, greenhouse logging, smart home dashboards, weather-adjacent\n    projects, room comfort monitors, enclosure monitoring, classroom demos, and portable sensor nodes that need\n    straightforward temperature and humidity readings.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eStarter bundles\u003c\/h3\u003e\n  \u003cp\u003e\n    Pair it with an \u003ca href=\"\/search?q=arduino\"\u003eArduino-compatible board\u003c\/a\u003e, \u003ca href=\"\/search?q=feather\"\u003eAdafruit Feather\u003c\/a\u003e,\n    or \u003ca href=\"\/search?q=raspberry+pi\"\u003eRaspberry Pi\u003c\/a\u003e, plus a \u003ca href=\"\/search?q=STEMMA+QT+cable\"\u003eSTEMMA QT cable\u003c\/a\u003e\n    or jumper wires for quick setup.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eRecommended add-ons\u003c\/h3\u003e\n  \u003cp\u003e\n    Useful add-ons include OLED displays, microSD logging boards, battery packs, enclosures, and other I2C sensors\n    for building more complete environmental monitoring systems.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n  \u003ctable\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProduct\u003c\/th\u003e\n      \u003ctd\u003eAdafruit AHT20 Temperature \u0026amp; Humidity Sensor Breakout Board - STEMMA QT \/ Qwiic\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eMain Sensor\u003c\/th\u003e\n      \u003ctd\u003eAHT20\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eMeasured Values\u003c\/th\u003e\n      \u003ctd\u003eTemperature and relative humidity\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eInterface\u003c\/th\u003e\n      \u003ctd\u003eI2C\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eI2C Address\u003c\/th\u003e\n      \u003ctd\u003e0x38\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eLogic \/ Power\u003c\/th\u003e\n      \u003ctd\u003e3.3V or 5V compatible\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eTemperature Range\u003c\/th\u003e\n      \u003ctd\u003e-40°C to 85°C\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eTemperature Accuracy\u003c\/th\u003e\n      \u003ctd\u003e±1°C typical over the full operating range\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eHumidity Range\u003c\/th\u003e\n      \u003ctd\u003e0 to 100% RH\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eHumidity Accuracy\u003c\/th\u003e\n      \u003ctd\u003e±3% RH typical over the full operating range\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eConnector Type\u003c\/th\u003e\n      \u003ctd\u003eSTEMMA QT \/ Qwiic-compatible JST SH connectors\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eRevision Note\u003c\/th\u003e\n      \u003ctd\u003eCurrent Adafruit listing notes the newer sensor version with PTFE filter\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003ePinout \u0026amp; usage notes\u003c\/h3\u003e\n  \u003cp\u003e\n    Since this is an \u003cstrong\u003eI2C sensor\u003c\/strong\u003e, wiring is simple and works well with modern microcontrollers and Linux-capable boards.\n    It is a good fit for projects where you want steady environmental readings without dealing with timing-sensitive one-wire communication.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Adafruit also notes a tighter “comfort range” performance window of about \u003cstrong\u003e±0.3°C\u003c\/strong\u003e and \u003cstrong\u003e±2% RH\u003c\/strong\u003e\n    in mid-range conditions, which makes it especially practical for room monitoring and general indoor sensing.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat’s in the box\u003c\/h3\u003e\n  \u003cp\u003e\n    1 × Adafruit AHT20 temperature and humidity sensor breakout board\n  \u003c\/p\u003e\n  \u003cp\u003e\n    \u003cstrong\u003eNote:\u003c\/strong\u003e STEMMA QT cable is not included.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n  \u003cdiv class=\"faq-list\"\u003e\n    \u003cdiv class=\"faq\"\u003e\n      \u003cstrong\u003eWhat does this sensor measure?\u003c\/strong\u003e\n      It measures air temperature and relative humidity.\n    \u003c\/div\u003e\n    \u003cdiv class=\"faq\"\u003e\n      \u003cstrong\u003eCan I use it with Arduino or Raspberry Pi?\u003c\/strong\u003e\n      Yes. It uses standard I2C and is intended for Arduino, Linux, and Raspberry Pi style projects.\n    \u003c\/div\u003e\n    \u003cdiv class=\"faq\"\u003e\n      \u003cstrong\u003eCan I connect more than one on the same I2C bus?\u003c\/strong\u003e\n      Not directly in most cases, because it uses a single fixed I2C address.\n    \u003c\/div\u003e\n    \u003cdiv class=\"faq\"\u003e\n      \u003cstrong\u003eIs the QT cable included?\u003c\/strong\u003e\n      No. The breakout has STEMMA QT \/ Qwiic connectors, but the cable is sold separately.\n    \u003c\/div\u003e\n    \u003cdiv class=\"faq\"\u003e\n      \u003cstrong\u003eCan I read it often?\u003c\/strong\u003e\n      Yes. Adafruit notes that you can take readings as often as you like.\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":52445323559201,"sku":"4566","price":378.0,"currency_code":"PHP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/1491\/5617\/files\/4566-04.jpg?v=1773454083","url":"https:\/\/circuit.rocks\/products\/adafruit-aht20-temperature-humidity-sensor-breakout-board-stemma-qt-qwiic","provider":"circuitrocks","version":"1.0","type":"link"}