#include <dht.h>
dht DHT; 
#define DHT22_PIN 2

void setup()
{
 Serial.begin(115200);
 Serial.println("dht22_test.ino");
 Serial.print("LIBRARY VERSION: ");
 Serial.println(DHT_LIB_VERSION);
 Serial.println();
 Serial.println("Type,\tstatus,\tHumidity (%)");
}
void loop()
{
  // READ DATA
Serial.print("DHT22, \t");

uint32_t start = micros(); 
int chk = DHT.read22(DHT22_PIN); 
uint32_t stop = micros(); 

// DISPLAY DATA
Serial.print(DHT.humidity, 1);
Serial.print(",\t");
Serial.print(DHT.temperature, 1);
Serial.print(",\t");
Serial.print(stop - start);
Serial.println();
delay(2000);
}