SHT35 humidity sensor and Arduino example
In this article we look at the SHT35 humidity sensor, this is very similar to the SHT30 and SHT31 sensors in the same family but is a more expensive one.
We connect the SHT35 humidity 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.
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 |
| SHT35 | SHT35 temperature and humidity sensor module |
| 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 SHt35 is the same pinout.
Code Example
This example uses the library from the following location – https://github.com/Risele/SHT3x
[codesyntax lang=”cpp”]
#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);
}
[/codesyntax]
Output
Here is an example of what I saw in the serial monitor window – you may see some different results
Temperature: 27.65°C
Humidity: 58.01%
Temperature: 28.30°C
Humidity: 59.60%
Temperature: 28.86°C
Humidity: 60.85%
Temperature: 29.38°C
Humidity: 61.74%
Temperature: 29.36°C
Humidity: 62.14%
Links
