Tinker Tailor
SHT40 Temperature & Humidity Sensor – STEMMA QT / Qwiic
SHT40 Temperature & Humidity Sensor – STEMMA QT / Qwiic
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A precise little sensor for knowing how warm and humid it is — on the body, inside a garment, or in the room. The Sensirion SHT40 is a big step up from older sensors like the DHT11 and DHT22: faster, far more accurate, and it uses almost no power.
Ships next business day from Nova Scotia · 30-day returns · Questions? cmoz@tinkertailor.ca
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Details
Best of all, this board has two Qwiic / STEMMA QT connectors, so you can plug it straight into a compatible microcontroller with a cable — no soldering needed — and daisy-chain other I2C sensors off the second port. Headers are included too if you prefer a breadboard.
Specifications
- Sensor: Sensirion SHT40
- Temperature accuracy: ±0.2 °C (0 to +70 °C)
- Humidity accuracy: ±1.8% RH (10–90% RH)
- Interface: I2C, address 0x44
- Supply voltage: 3–5V
- Connectors: 2 × JST SH 4-pin (Qwiic / STEMMA QT) plus 0.1" header
Pin Definitions
- VIN — Power in, 3–5V
- GND — Ground
- SCL — I2C clock
- SDA — I2C data
Project Ideas
Garments that warn you when you're overheating, a scarf that glows when it's cold out, sweat and comfort studies in performance wear, or a mini weather station you can wear on a bag strap.
Good to know
Mount the sensor where air can reach it. If it's sealed inside thick fabric it will read the temperature of the garment, not the air around you.
Pair It With
Plug it into the Adafruit ESP32-C3 QT Py or Adafruit ESP32-S2 QT Py with a STEMMA QT / Qwiic 50mm cable, or use the STEMMA QT to male header cable to connect it to any board with header pins. Show your readings on the 1.28" round TFT display. Want something simpler? We also stock the Adafruit AHT20.
In the box
- SHT40 temperature & humidity module × 1
- Header pins × 1 set
