{"product_id":"adafruit-sensirion-sht40-temperature-humidity-sensor-stemma-qt-qwiic","title":"Adafruit Sensirion SHT40 Temperature \u0026 Humidity Sensor - STEMMA QT \/ Qwiic","description":"\u003cp\u003eSensirion Temperature\/Humidity sensors are some of the finest \u0026amp; highest-accuracy devices you can get. And finally, we have some that have a true I2C interface for easy reading. The SHT40 sensor is the fourth generation (started at the SHT10 and worked its way up to the top!). The SHT40 has an excellent ±1.8% typical relative humidity accuracy from 25 to 75% and ±0.2 °C typical accuracy from 0 to 75°C.\u003c\/p\u003e\n\u003cp\u003eUnlike some earlier SHT sensors, this sensor has a true I2C interface for easy interfacing with only two wires (plus power and ground!). Thanks to the voltage regulator and level-shifting circuitry we've included on the breakout It is also 3V or 5V compliant, so you can power and communicate with it using any microcontroller or microcomputer.\u003c\/p\u003e\n\u003cp\u003eSuch a lovely chip - so we spun up a breakout board with the SHT4x and some supporting circuitry such as pullup resistors and capacitors. To make things even easier, we've included SparkFun Qwiic compatible STEMMA QT connectors for the I2C bus so you don't even need to solder! QT Cable is not included, but we have a \u003ca href=\"\/hi\/search?q=stemma+qt+cable\u0026amp;narrow_by=\u0026amp;sort_by=relevency\u0026amp;page=1\"\u003evariety in the shop\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eIf you prefer working on a \u003ca href=\"\/hi\/collections\/solderless-breadboards\"\u003ebreadboard\u003c\/a\u003e, 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\u003eWe've written both Arduino and CircuitPython\/Python library code for this chip, so you can use it with just about any microcontroller or single-board computer like Raspberry Pi.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDisplay and cables are NOT included\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eRevision History\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAs of October 2022\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e– we've updated this PCB with \u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_Pinguin\"\u003eAdafruit Pinguin\u003c\/a\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\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSHT40 Specifications \u0026amp; Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRelative humidity accuracy: up to ±1.8 %RH\u003c\/li\u003e\n\u003cli\u003eTemperature accuracy: up to ±0.2 °C\u003c\/li\u003e\n\u003cli\u003eBreakout supply voltage: 3.3 to 5V\u003c\/li\u003e\n\u003cli\u003eAverage bare sensor current: 0.4 μA (at meas. rate 1 Hz)\u003c\/li\u003e\n\u003cli\u003eIdle bare sensor current: 80 nA\u003c\/li\u003e\n\u003cli\u003eI2C fast mode plus, CRC checksum\u003c\/li\u003e\n\u003cli\u003eOperating range: 0 - 100 %RH, -40 - 125 °C\u003c\/li\u003e\n\u003cli\u003eFully functional in a condensing environment\u003c\/li\u003e\n\u003cli\u003eVariable power heater\u003c\/li\u003e\n\u003cli\u003eNIST traceability for sensor\u003c\/li\u003e\n\u003cli\u003eJEDEC JESD47 qualification for sensor\u003c\/li\u003e\n\u003cli\u003eMature technology from global market leader Sensirion\u003c\/li\u003e\n\u003cli\u003eI2C address 0x44\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-sht40-temperature-humidity-sensor\"\u003ePrimary Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":50847198544145,"sku":"ADA4885","price":5.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6285\/6209\/files\/adafruit-sensirion-sht40-temperature-humidity-sensor-stemma-qt-qwiic-adafruit-ada4885-43336037466307.jpg?v=1735208306","url":"https:\/\/abcd3032.myshopify.com\/hi\/products\/adafruit-sensirion-sht40-temperature-humidity-sensor-stemma-qt-qwiic","provider":"Tayyab Zak","version":"1.0","type":"link"}