Adafruit Sensirion SHT31-D

Sensirion Temperature/Humidity sensors are some of the finest & highest-accuracy devices you can get. And, finally we have some that have a true I2C interface for easy reading. The SHT31-D sensor has an excellent ±2% relative humidity and ±0.3°C accuracy for most uses.

Vin
Board power input. Adafruit Learn states the chip can use 2.5-5VDC and the board should be powered at the same level as the microcontroller logic.
Type · powerVoltage · 2.5-5VDC, match controller logic level
GND
Common ground for power and logic.
Type · groundVoltage · 0V
SCL
I2C clock line. Adafruit Learn states this pin has a 10K pull-up resistor to Vin.
Type · i2c clockVoltage · logic level pulled up to Vin
SDA
I2C data line. Adafruit Learn states this pin has a 10K pull-up resistor to Vin.
Type · i2c dataVoltage · logic level pulled up to Vin
STEMMA QT
STEMMA QT I2C connector for development boards and accessories, carrying the board I2C/power connection.
Type · connector

Start wiring

I2C · SPI · 2.5-5VDC, match controller logic level · 0V

Confirm the data interface matches your host board.

Module pins: Vin, GND, SCL, SDA. Schematik maps them to your board in the app.

Related groups

4 groups

Connectors

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Connectors & cables · Connectors · 28 parts

Displays

Character LCDs, SPI TFTs, e-paper modules and larger capacitive-touch TFT panels solve different display jobs. Treat display class, interface, controller, resolution, touch, refresh behaviour, storage, voltage and mounting as separate swap checks.

Displays · TFT & LCD displays · 33 parts

Air quality

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MCUs and boards

ESP32, Arduino Uno, Raspberry Pi Pico, and compatible add-on boards for running builds.

Boards · Microcontroller boards · 24 parts

Pin	Type	Function	Voltage
Vin	power	Board power input. Adafruit Learn states the chip can use 2.5-5VDC and the board should be powered at the same level as the microcontroller logic.	2.5-5VDC, match controller logic level
GND	ground	Common ground for power and logic.	0V
SCL	i2c clock	I2C clock line. Adafruit Learn states this pin has a 10K pull-up resistor to Vin.	logic level pulled up to Vin
SDA	i2c data	I2C data line. Adafruit Learn states this pin has a 10K pull-up resistor to Vin.	logic level pulled up to Vin
STEMMA QT	connector	STEMMA QT I2C connector for development boards and accessories, carrying the board I2C/power connection.
ADR	address select	I2C address selection. Adafruit Learn states the default address is 0x44 via 10K pull-down, and tying ADR to Vin selects 0x45.	low default, tie to Vin for address 0x45
RST	reset	Hardware reset input. Adafruit Learn states it has a 10K pull-up and can be connected to ground for reset.	pulled up by default, active low reset
ALR	interrupt	Alert/interrupt output for configured sensor events.

Pinout

Start wiring

Connectors

Displays

Air quality

MCUs and boards