{"product_id":"adafruit-hdc3022-precision-temperature-humidity-sensor-stemma-qt-qwiic","title":"Adafruit HDC3022 Precision Temperature \u0026 Humidity Sensor","description":"\u003cp\u003e\u003cspan\u003eThe TI HDC302x series chip has typical 0.5% accuracy for the RH sensor (with 0.19% long-term drift) and ±0.1°C typical accuracy for the temperature sensor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis \u003cstrong\u003eAdafruit HDC3022 Precision Temperature \u0026amp; Humidity Sensor\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebreakout features the highest accuracy \u0026amp; precision Adafruit have seen so far! It has the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.ti.com\/product\/HDC3020\"\u003eTI HDC302x series chip\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003ewith typical 0.5% accuracy for the RH sensor (with 0.19% long-term drift) and ±0.1°C typical accuracy for the temperature sensor. All at a very nice price.\u003c\/p\u003e\n\u003cp\u003eThis sensor has a true I2C interface for easy interfacing with only two wires (plus power and ground!). That makes it preferable to the janky DHT11\/DHT22 sensors. The sensor is 5V safe, so you can use 1.8V to 5V power and logic levels without the need for shifters, so you can power and communicate with it using any microcontroller or microcomputer. With 4 selectable I2C addresses, you can have multiple sensors on one bus - unlike many other fixed-address T\/RH sensors.\u003c\/p\u003e\n\u003cp\u003eAdafruit have written a\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_HDC302x\"\u003efull-featured Arduino\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_CircuitPython_HDC302x\"\u003eCircuitPython\/Python library\u003c\/a\u003e, so whether you have an 8-bit microcontroller or a quad-core Raspberry Pi, you will be able to quickly get data from the sensor for your environmental monitoring needs. The library can setup the sensor rate\/power, heater, alerts, offsets, and read data or NIST tracking ID.\u003c\/p\u003e\n\u003cp\u003eSuch a lovely chip - so Adafruit spun up a breakout board with the HDC3022 and some supporting circuitry such as pullup resistors and capacitors. To make things even easier, it includes \u003ca href=\"\/collections\/qw-st\" rel=\"noopener\" target=\"_blank\"\u003eSparkFun Qwiic compatible STEMMA QT\u003c\/a\u003e connectors for the I2C bus so you don't even need to solder! \u003ca href=\"\/products\/jst-sh-cable-qwiic-stemma-qt-compatible\" rel=\"noopener\" target=\"_blank\"\u003eQT Cable is not included, but we have a variety in the shop\u003c\/a\u003e. \u003c\/p\u003e\n\u003cp\u003eIf you prefer working on a breadboard, each 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, but it's fairly easy and takes only a few minutes even for a beginner. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note: this sensor comes with a protective polyamide sticker on top, please remove before usage!\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003eRevision History:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAs of September 23, 2024\u003c\/b\u003e – Adafruit have upgraded this sensor to now be the \"HDC3022\" rather than the \"HDC3021\". It is completely the same other than it now has a white PTFE filter cover that should not be removed and will keep your sensor nice and clean.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHDC302x specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRelative humidity (RH) sensor:\u003cbr\u003e– Operating range: 0% to 100%\u003cbr\u003e– Accuracy: ±0.5% typical\u003cbr\u003e– Offset Error Correction: reduces offset to return device to within accuracy specification\u003cbr\u003e– Long-term drift: 0.19%RH\/yr\u003cbr\u003e– Condensation protection with integrated heater\u003c\/li\u003e\n\u003cli\u003e Temperature sensor:\u003cbr\u003e– Operating range: –40°C to 125°C\u003cbr\u003e– Accuracy: ±0.1°C typical\u003c\/li\u003e\n\u003cli\u003eNIST traceability: relative humidity \u0026amp; temperature\u003c\/li\u003e\n\u003cli\u003eLow power: average current 0.4 µA (sensor only, not including on-board green LED which can be disabled)\u003c\/li\u003e\n\u003cli\u003eI2C interface compatibility up to 1-MHz speeds\u003cbr\u003e– Four selectable I2C addresses\u003cbr\u003e– Data protection through CRC checksum\u003c\/li\u003e\n\u003cli\u003eSupply voltage: 1.62 V to 5.50 V\u003c\/li\u003e\n\u003cli\u003eAvailable auto measurement mode\u003c\/li\u003e\n\u003cli\u003eProgrammable interrupts\u003c\/li\u003e\n\u003cli\u003eProgrammable RH and Temp measurement offset\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduct Dimensions: 25.4mm x 17.7mm x 4.7mm \/ 1.0\" x 0.7\" x 0.2\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 1.6g \/ 0.1oz\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2011_65_EU.svg\" alt=\"RoHS 2 2011 65 EU Compliant\" width=\"145\" height=\"80\"\u003e \u003cimg src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2015_863_EU.svg\" alt=\"RoHS 2 2015 863 EU Compliant\" width=\"145\" height=\"80\"\u003e\u003c\/p\u003e\n\u003ch2\u003eLearn\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-hdc3021-precision-temperature-humidity-sensor\"\u003ePrimary Guide: Adafruit HDC302x Precision Temperature \u0026amp; Humidity Sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":56500170948981,"sku":"ADA5989","price":7.46,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0389\/1025\/files\/5989-07.jpg?v=1766148642","url":"https:\/\/wholesale.pimoroni.com\/products\/adafruit-hdc3022-precision-temperature-humidity-sensor-stemma-qt-qwiic","provider":"Pimoroni Wholesale","version":"1.0","type":"link"}