SHT30 humidity sensor and ESP32 board example

In this article we look at the SHT30 humidity sensor

There is an Arduino based library as well so we will use the Arduino IDE and connect this up to an ESP32 board. This is the particular sensor I used

First of all the sensor

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.

Parts Required

This particular sensor costs about $2.40

Name	Link
ESP32		Aliexpress link Amazon Ebay
SHT30		Aliexpress link Ebay link Amazon Link
Connecting cables		Aliexpress link Amazon Ebay

Schematic/Connection

esp32 and SHT30 layout

Code Example

You need the library from – https://github.com/Risele/SHT3x

There are many examples to choose from

#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

Open the serial monitor and you should see something like this

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%

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