Speed-Up your Development with SHT31 Humidity and Temperature Sensor

The SHT31 Smart Gadget is a reference design and development kit which demonstrates the outstanding performance and ease of use of Sensirion’s humidity and temperature sensors.

This is an archive article published 07/26/2017. Some information may no longer be up to date and in line with the current state. Please contact us in case of interest.

SHT 31 Smart Gadget helps developers to kick-start their own projects with an SHT31 sensor, Bluetooth module and corresponding apps.

The Smart Gadget not only shows humidity and temperature values on the display, but can also communicate with a Bluetooth 4.0 (also known as Bluetooth Low Energy, BLE or Bluetooth Smart) capable device like a smartphone. The Smart Gadget apps run with Android 4.3 or later and iOS 8 or later, respectively.

Sensirion GitHub provide Hardware manufacturing data (Gerber, NC drill and pick&place files, schematics, BOM), Firmware for BLE module and LCD Driver, Bluetooth profile Definition and source code for IOS and Android app.

For developers who prefer to use Eclipse IDE, the GNU compiler collection (GCC), and the GNU Debugger (GDB) to develop and debug programs on the nRF51 and nRF52 series devices NordicSemi prepared step by step tutorial. Proprietary development tools like ARMKEIL uVision are also supported of course. Sensirion’s demo application can be compiled by using of the free 32kB license of uVision.

SHT3x Humidity and Temperature Sensor Series
The 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. In the present time SHT30(31)-ARP-B, DIS-B, DIS-P, DIS-F, SHT35-DIS-B, DIS-F are available.

Interface option:
DIS - Digital I2C single shot
ARP - Analog ratiometric out periodic
Membrane option: [B - no Filter Membrane, P – Protective, F - Filter]

• Membrane is a factory mounted ePTFE foil, pore size 200nm – 2µm
• protects the sensor opening from splash water and dust according to IP67
• is designed for sensor life-time usage including multiple reflow soldering cycles
• does not alter sensor response time.

For more information please see SHT31 Smart Gadget or SHT31 datasheet. Please pay attention also to Handling Instructions for Humidity and Temperature Sensors.
For further information about Sensirion products please contact us at sales@soselectronic.com.


SHT31 Smart Gadget features:

  • SHT31 humidity sensor
  • LCD display for humidity, temperature and dew point in C and F
  • Bluetooth Low Energy (BLE) connectivity to iOS and Android smartphones
  • iOS and Android apps available
  • Data logging capabilities
  • Complete hardware, firmware and software design resources available

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Competition with the following question has been published here:

What type of tape does Sensirion recommend to cover the top surface of SHT31 sensor when applying conformal coating by spraying?

The correct answer was: 3M Electrical Tape 92
We have drawn the following winners:
Jaroslav Pulik [SK]
Miloš Lemfeld [CZ]
Robert Letko [SK]
Congratulations to winners. We´ll inform them by e-mail.

Main products


SHT31 SMART GADGET (SHT31 Smart Gadget Development kit) SENSIRION  
SHT31 SMART GADGET (SHT31 Smart Gadget Development kit)

Ref Design and Development Kit with Bluetooth 4.0 for SHT31-DIS-B

Development Tools

Ord. No.: 217297
Manufacturer: SENSIRION
No longer available

Additional products


SHT31-DIS-B (SHT31-DIS-B2.5kS) SENSIRION  
SHT31-DIS-B (SHT31-DIS-B2.5kS)

Humidity & Temperature Sensor I2C DFN8

Humidity and Temperature Sensors

Ord. No.: 182220
Manufacturer: SENSIRION
in stock 4792 pcs
(07/29/2022: 2500 pcs)
1 pcs+
10 pcs+
50 pcs+
100 pcs+
2,30 €
2,26 €
2,22 €
2,17 €
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SF2 Filter Cap (SF2) SENSIRION  
SF2 Filter Cap (SF2)

Filter Cap for SHT2x/3x/4x, SHTC1 and SHTC3 Sensors

Humidity and Temperature Sensors

Ord. No.: 101772
Manufacturer: SENSIRION
in stock 1265 pcs
(06/03/2022: 2000 pcs)
(We are checking the delivery date: 500 pcs)
3 pcs+
50 pcs+
100 pcs+
0,9500 €
0,7900 €
0,6500 €
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SHT31-ARP-B (SHT31-ARP-B2.5kS) SENSIRION  
SHT31-ARP-B (SHT31-ARP-B2.5kS)

Humidity & Temperature Sensor Analog 10...90% VDD DFN8

Humidity and Temperature Sensors

Ord. No.: 182219
Manufacturer: SENSIRION
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Get Quote

SHT30-DIS-B (SHT30-DIS-B2.5kS) SENSIRION  
SHT30-DIS-B (SHT30-DIS-B2.5kS)

Humidity & Temperature Sensor I2C DFN8

Humidity and Temperature Sensors

Ord. No.: 186949
Manufacturer: SENSIRION
in stock 692 pcs
(07/29/2022: 2500 pcs)
1 pcs+
10 pcs+
50 pcs+
100 pcs+
1,73 €
1,70 €
1,67 €
1,63 €
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SHT25 SENSIRION  
SHT25

Humidity & Temperature Sensor I2C DFN6

Humidity and Temperature Sensors

Ord. No.: 101769
Manufacturer: SENSIRION
in stock 0 pcs
(06/03/2022: 400 pcs)
(06/10/2022: 1200 pcs)
(07/15/2022: 1600 pcs)
(08/05/2022: 800 pcs)
(08/26/2022: 400 pcs)
(We are checking the delivery date: 400 pcs)
NRND
1 pcs+
6,65 €
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SHT21 SENSIRION  
SHT21

Humidity & Temperature Sensor I2C DFN6

Humidity and Temperature Sensors

Ord. No.: 87917
Manufacturer: SENSIRION
in stock 0 pcs
(06/03/2022: 10000 pcs)
(06/24/2022: 1200 pcs)
(07/15/2022: 400 pcs)
(07/22/2022: 400 pcs)
(07/29/2022: 1200 pcs)
NRND
1 pcs+
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50 pcs+
100 pcs+
3,90 €
3,85 €
3,80 €
3,78 €
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SHT75 SENSIRION  
SHT75

Humidity & Temperature Sensor Sbus SIL4

Humidity and Temperature Sensors

Ord. No.: 45894
Manufacturer: SENSIRION
No longer available
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