SHT30 is a temperature and humidity sensor, almost the same as DHT22 only much smaller. They also measure a larger range, from -40 to 125 C.

Parts:

What we need is a Wemos D1 Mini board, which can be found on Aliexpress for around 5$. And of course the SHT30 shield can also be found on Aliexpress for a few dollars.

SHT30 @ Aliexpress

Wemos D1 Mini @ Aliexpress

Code:

Next up is installing the Arduino Library for the SHT30, unzip in libraries folder and restart Arduino IDE.

Then in Arduino IDE select the example called SHT30_SHIELD, or use example code below,  just to verify that our sensor is working correctly.

Basic Example

#include <WEMOS_SHT3X.h>
 
SHT3X sht30(0x45);
 
void setup() {
 
  Serial.begin(115200);
 
}
 
void loop() {
 
  if(sht30.get()==0){
    Serial.print("Temperature in Celsius : ");
    Serial.println(sht30.cTemp);
    Serial.print("Temperature in Fahrenheit : ");
    Serial.println(sht30.fTemp);
    Serial.print("Relative Humidity : ");
    Serial.println(sht30.humidity);
    Serial.println();
  }
  else
  {
    Serial.println("Error!");
  }
  delay(1000);
 
}

Then open up the serial monitor and you should see it reporting temperature and humidity:

Thats it! Now play around with it. Hope this short guide was helpful.