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SHT30 humidity sensor and Arduino example

by shedboy71

In this article we connect an SHT30 Sensor to an Arduino Uno – other arduino boards should be Ok as well but I have not verified this

Sensor Information

The digital SHT3x humidity sensor series takes sensor technology to a new level. As the successor of the SHT2x series it sets the industry standard in humidity sensing. The SHT3x humidity sensor series consists of a low-cost version with the SHT30 humidity sensor, a standard version with the SHT31 humidity sensor, and a high-end version with the SHT35 humidity sensor. Automotive grade versions are also available.

The SHT3x humidity sensor series combines multiple functions and various interfaces (I2C, analog voltage output) with a applications-friendly, very wide operating voltage range (2.15 to 5.5 V). The SHT3x humidity sensor is available in both large and small volumes.

The SHT3x builds on a completely new and optimized CMOSens® chip, which allows for increased reliability and improved accuracy specifications.

The SHT3x offers a range of new features, such as enhanced signal processing, two distinctive and user-selectable I2C addresses, an alert mode with programmable humidity and temperature limits, and communication speeds of up to 1 MHz.

The DFN package has a footprint of 2.5 × 2.5 mm2 with a height of 0.9 mm. This allows for integration of the SHT3x into a great variety of applications.

Additionally, the wide supply voltage range of 2.15 to 5.5 V and variety of available interfaces guarantee compatibility with diverse integration requirements.

This is an image of the sensor that I purchased – there are 3 similar sensors of the SHT3x series

Features

Size 2.5 x 2.5 x 0.9 mm
Output I²C, Voltage Out
Supply voltage range 2.15 to 5.5 V
Energy consumption 4.8µW (at 2.4 V, low repeatability, 1 measurement / s)
RH operating range 0 – 100% RH
T operating range -40 to +125°C (-40 to +257°F)
RH response time 8 sec (tau63%)

Parts Required

You can connect to the sensor using  dupont style jumper wire.

Name Link
Arduino Uno UNO R3 CH340G with usb cable
SHT30 SHT30 Temperature Humidity Sensor
Connecting cables Male to Male + Male to Female and Female to Female Jumper Wire Dupont Cable

 

Schematic/Connection

I used 3.3v from the Arduino Uno – 5v should be ok. The part says SHT31 but the SHt30 is the same pinout.

arduino and sht3x layout

arduino and sht3x layout

Code Example

This example uses the library from the following location – https://github.com/Risele/SHT3x

#include <SHT3x.h>
SHT3x Sensor;
void setup() 
{
 
  Serial.begin(19200);
  Sensor.Begin();
}
 
void loop() 
{
 
  Sensor.UpdateData();
  Serial.print("Temperature: ");
  Serial.print(Sensor.GetTemperature());
  Serial.write("\xC2\xB0"); //The Degree symbol
  Serial.println("C");
  Serial.print("Humidity: ");
  Serial.print(Sensor.GetRelHumidity());
  Serial.println("%");
 
  delay(500);
}

Output

Here is  an example of what I saw in the serial monitor window – you may see some different results

Temperature: 25.65°C
Humidity: 56.01%
Temperature: 26.30°C
Humidity: 56.60%
Temperature: 26.86°C
Humidity: 56.85%
Temperature: 26.38°C
Humidity: 56.74%
Temperature: 25.36°C
Humidity:56.14%

 

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