SHT31-D Temperature & Humidity Sensor I2C Breakout – 3V 5V
SHT31-D Temperature & Humidity Sensor I2C Breakout – 3V 5V
SHT31-D Temperature & Humidity Sensor Breakout Board
Get highly accurate environmental readings with the SHT31-D Temperature and Humidity Sensor Breakout Module. Featuring Sensirion's industry-leading SHT31-D sensor, this compact breakout board delivers ±2% relative humidity and ±0.3°C temperature accuracy — making it one of the most precise and reliable sensors available for hobbyists, makers, and engineers alike.
With a true I2C (IIC) interface, integration into your projects is straightforward. The board is compatible with both 3.3V and 5V systems, so it works seamlessly with popular platforms like Arduino, Raspberry Pi, and virtually any other microcontroller or single-board computer.
Made in Mainland China.
Key Features
- High Accuracy: ±2% relative humidity and ±0.3°C temperature accuracy
- True I2C Interface: Simple two-wire communication with your microcontroller
- Dual I2C Address Support: Default address 0x44; tie ADR pin to Vin for 0x45
- Wide Voltage Compatibility: Works with 2.5V to 5V DC power supplies
- Onboard Pull-up Resistors & Capacitors: Supporting circuitry included — no extra components needed
- Alert/Interrupt Output (ALR): Configure event-based alerts via the datasheet
- Hardware Reset Pin (RST): Pull to ground to reset the chip
- Fully Assembled & Tested PCB: Ready to use; just solder on the included header pins
Pin Overview
- Vin – Power input (2.5V–5V DC). Match to your microcontroller's logic level (e.g., 5V for Arduino, 3.3V for Raspberry Pi)
- GND – Common ground for power and logic
- SCL – I2C clock pin (10K pull-up resistor to Vin included)
- SDA – I2C data pin (10K pull-up resistor to Vin included)
- ADR – I2C address selector (default: 0x44; connect to Vin for 0x45)
- RST – Hardware reset (pull to GND to reset; 10K pull-up keeps chip active by default)
- ALR – Alert/Interrupt output for event-driven sensor notifications
What's in the Box?
- 1× Fully assembled and tested SHT31-D PCB breakout board
- 1× Small piece of header (soldering required — beginner friendly!)
Ideal Use Cases
- Arduino & Raspberry Pi weather stations
- Home automation and climate monitoring
- Greenhouse and indoor environment sensing
- IoT environmental data logging
- HVAC control and monitoring systems
Learn more: OSHA on personal protective equipment
Frequently Asked Questions
Q: Is the SHT31-D sensor breakout board compatible with Arduino?
A: Yes! The SHT31-D I2C humidity and temperature sensor breakout is fully compatible with Arduino boards. Since the board supports both 3.3V and 5V logic levels, it works with 5V Arduino boards (Uno, Mega, etc.) as well as 3.3V systems. Simply connect Vin to 5V, GND to ground, and the SCL/SDA pins to your Arduino's I2C clock and data lines.
Q: Does this sensor breakout support multiple I2C devices on the same bus?
A: Yes. The SHT31-D breakout offers two selectable I2C addresses — 0x44 (default) and 0x45 (by tying the ADR pin to Vin). This allows you to connect two SHT31-D modules on the same I2C bus without address conflicts, which is very useful for multi-zone temperature and humidity monitoring projects.
Q: Do I need to solder the header pins myself?
A: Yes, the board ships fully assembled and tested, but the header pins require soldering. Don't worry — it's a straightforward task that even beginners can complete in just a few minutes with a basic soldering iron.
Q: What is the accuracy of the SHT31-D temperature and humidity sensor?
A: The SHT31-D sensor offers industry-leading accuracy of ±2% relative humidity and ±0.3°C for temperature. This makes it one of the most precise environmental sensors available for microcontroller-based projects, weather stations, and IoT applications.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.