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Grove - Temp&Humi Sensor(SHT31)

Grove - Temp&Humi Sensor(SHT31) is a highly reliable, accurate, quick response and integrated temperature & humidity sensor. The sensor(chip) used in the module is designed with Sensirion's CMOSens® technology. The chip is well calibrated, linearized and compensated for digital output.

The typical accuracy of this module can be ±2%RH (for relative humidity) and ±0.3°C (for temperature). This module is compatible with 3.3 Volts and 5 Volts and hence does not require a voltage level shifter. This module communicates using with I2C serial bus and can work up to 1 MHz speed. We also have provided a highly abstracted library to make this product more easier to use.

Using the sensor is easy. For Seeeduino (compliant with Arduino), just connect this breakout board with the main control board via Grove cable. Then use the provided library and example/demo code available at GitHub to get your data. If you're using an Arduino without a Base Shield, simply connect the VIN pin to the 5V voltage pin, GND to ground, SCL to I2C Clock (Analog 5) and SDA to I2C Data (Analog 4).

Features

  • Highly reliable, accurate and quick response time
  • Grove compatible and easy to use
  • Well calibrated, linearized, compensated for digital output
  • Highly abstracted development library

Tip

More details about Grove modules please refer to Grove System

Specifications

Parameter Value
Input voltage (VCC) 3.3 volts or 5 volts
I/O Logic Level 3.3 volts or 5 volts based on VCC
Operating Current 100 μA
Operating Temperature -40–125 ℃
Temperature Sensor Range -40–125 ℃, with ±0.3°C accuracy
Humidity Sensor Range 0% - 100%(Relative Humidity), with ±2% accuracy
Sensor Chip SHT31(Datasheet)
Interface Bus I2C
Weight 4 g (for breakout board), 9 g for whole package each piece
Dimensions 40(length)×20(width) mm

Platforms Supported

Arduino Raspberry Pi BeagleBone Wio LinkIt ONE

Caution

The platforms mentioned above as supported is/are an indication of the module's hardware or theoritical compatibility. We only provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library / demo code for all possible MCU platforms. Hence, users have to write their own software library.

Hardware Overview

This module is very easy to use using the Grove interface.

Caution

Do not touch, shake or let this product vibrate while using. Otherwise, it will affect the accuracy of data measured.

Package includes(main parts)

Parts name Quantity
Grove - Temp&Humi Sensor(SHT31) 1 piece
Grove cable 1 piece

Getting Started

Now let us run some basic examples with this module using the library/examples provided.

With Arduino

This section shows you how to build a simple project with Arduino platform. If you are using a different type of main control board, these instructions and source code probably still helps.

Materials required

  • Grove - Temp&Humi Sensor(SHT31) × 1
  • Seeeduino 4.2 (Fully compatible with Arduino) or Arduino UNO (other models also are fine) × 1
  • Grove - Base Shield × 1 (This is optional if you use Seeeduino because there are two I2C sockets on Seeeduino v4.2)
  • USB cable (type A to type B, for Arduino) × 1 or USB cable (Type-A to micro Type-B, for Seeeduino) × 1
  • Grove cable × 1

Connections

If you are using Seeeduino, connect the Grove module to I2C port like:

If you are using Arduino UNO or other compatibles, first attach Grove - Base Shield V2. Then, connect the Grove module to I2C port like:

Coding Work

You can find the demo sketch here and development library here.

  1. A typical demo code. You can upload code to main control board with Codebender.

  2. Download and upload the code. If you do not know how to upload an Arduino sketch, please visit https://www.arduino.cc/en/Guide/Windows for Windows user or https://www.arduino.cc/en/Guide/MacOSX for Mac user. You can see the result as below.

Tip

If you use Seeeduino, please also select Boards under Tools as you upload sketches.

Resources

Tech Support

Please do not hesitate to contact techsupport@seeed.cc if you have any technical issue. Or submit the issue into our forum.