{"product_id":"adafruit-sht41-trinkey-usb-temperature-and-humidity-sensor","title":"Adafruit SHT41 Trinkey - USB Temperature and Humidity Sensor","description":"\u003cp\u003eIt's half USB Key, half temperature-humidity sensor... it's the Adafruit SHT41 Trinkey. We wanted to make it super-easy to add one of our most popular combination environmental sensors to any computer with a USB A port.\u003c\/p\u003e\n\u003cp\u003eThe PCB is designed to slip into any USB A port on a computer or laptop. There's an ATSAMD21 microcontroller on board with just enough circuitry to keep it happy. One pin of the microcontroller connects to a NeoPixel LED. Another pin is used as a capacitive touch input on the end. A reset button lets you enter bootloader mode if necessary. That's it!\u003c\/p\u003e\n\u003cp\u003eThe SAMD21 can run CircuitPython or Arduino nicely - both have existing SHT4x, NeoPixel, and our FreeTouch (capacitive touch) libraries. Over the USB connection, you can have serial, MIDI, or HID connectivity.\u003c\/p\u003e\n\u003cp\u003eThe star of this Trinkey is the \u003ca href=\"\/hi\/products\/adafruit-sensirion-sht41-temperature-humidity-sensor-stemma-qt-qwiic\"\u003eSHT41 from Sensirion\u003c\/a\u003e. Sensirion Temperature\/Humidity sensors are some of the finest \u0026amp; highest-accuracy devices you can get. The SHT41 sensor is the fourth generation of I2C temperature and humidity sensor from Sensirion. (They started at the SHT10 and reached the top!). The SHT41 has an excellent ±1.8% typical relative humidity accuracy from 25 to 75% and ±0.2 °C typical accuracy from 0 to 75 °C. The reported temperature may be a few degrees higher than ambient due to self-heating.\u003c\/p\u003e\n\u003cp\u003eThe SHT41 Trinkey is perfect for simple projects that want to read the ambient temperature and humidity without extra wiring, soldering, drivers, or complex software. We even ship the board pre-programmed with code that will print a unique serial number, the temperature, humidity, and touch sensor over a serial\/COM port in CSV (comma-separated value) format, so you can use it immediately. Use any \u003ca href=\"\/hi\/products\/usb-3-0-extension-cable\"\u003eUSB A extension cable\u003c\/a\u003e if you need to measure farther than the computer port.\u003c\/p\u003e\n\u003cp\u003eIf you need the 'best' of the SHT4x series, check out the \u003ca href=\"\/hi\/products\/adafruit-sht45-trinkey-usb-temperature-and-humidity-sensor\"\u003eSHT45 Trinkey\u003c\/a\u003e, which has ±1.0% typical relative humidity accuracy from 25 to 75% and ±0.1°C typical accuracy from 0 to 75 °C.\u003c\/p\u003e\n\u003cp\u003eWe think it's just an adorable little board. It's small, durable, and inexpensive enough that it could be the first microcontroller board or inspiration for advanced developers to make something simple and fun.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eATSAMD21E18 32-bit Cortex M0+ - 48 MHz 32-bit processor with 256KB Flash and 32 KB RAM\u003c\/li\u003e\n\u003cli\u003eNative USB supported by every OS - can be used in Arduino or CircuitPython as a USB serial console, MIDI, Keyboard\/Mouse HID, and even a little disk drive for storing Python scripts.\u003c\/li\u003e\n\u003cli\u003eCan be used with Arduino IDE or CircuitPython\u003c\/li\u003e\n\u003cli\u003eOne RGB NeoPixel LED\u003c\/li\u003e\n\u003cli\u003eOne Capacitive Touchpad\u003c\/li\u003e\n\u003cli\u003eSHT41 Temperature + Humidity sensor with thermal-isolation cutout\u003c\/li\u003e\n\u003cli\u003eReset switch to start your project code over or enter bootloader mode\u003c\/li\u003e\n\u003cli\u003eSlim and cute, keychain-friendly!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"\/\/www.youtube.com\/embed\/Iw4JgXkFBxg?si=nJeyuJjnljGOg1m7\u0026amp;start=40\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\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\u003c\/li\u003e\n\u003cli\u003eDimensions: 31.8mm x 11.8mm x 4.5mm\u003c\/li\u003e\n\u003cli\u003eWeight: 1.6g\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-sht4x-trinkey\"\u003ePrimary Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":50847372443921,"sku":"ADA5912","price":10.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6285\/6209\/files\/adafruit-sht41-trinkey-usb-temperature-and-humidity-sensor-adafruit-ada5912-42204268069059.jpg?v=1735211857","url":"https:\/\/abcd3032.myshopify.com\/hi\/products\/adafruit-sht41-trinkey-usb-temperature-and-humidity-sensor","provider":"Tayyab Zak","version":"1.0","type":"link"}