Crowtail-DHT20

https://www.elecrow.com/wiki/crowtail--dht20.html

Crowtail-DHT20
Model: CRT10251D
Port I2C 0x38 in default

https://www.elecrow.com/wiki/image/5/52/Crowtail-DHT20.zip Librairie

DHT20.ino

#include <DHT20.h>
/*!
 * @brief Construct the function
 * @param pWire IC bus pointer object and construction device, can both pass or not pass parameters, Wire in default.
 * @param address Chip IIC address, 0x38 in default.
 */
DHT20  dht20;
void setup()
{
  Serial.begin(115200);
  //Initialize sensor
  while(dht20.begin())
{
    Serial.println("Initialize sensor failed");
    delay(1000);
   }
}

void loop()
{
  //Get ambient temperature
  Serial.print("temperature:"); Serial.print(dht20.getTemperature());Serial.print("C");
  //Get relative humidity
  Serial.print("  humidity:"); Serial.print(dht20.getHumidity()*100);Serial.println(" %RH");

  delay(1000);
}