1. DHT11 Digital temperature and humidity sensor is a composite Sensor contain a calibrated digital signal output of the temperature and humidity.
  2. It provides a Digital Output.
  1. Accuracy: At 25℃
  2. Low cost
  3. 5V DC operating voltage.
  4. I/O pins are 5V and 3.3V compliant.
  5. Long-term stability
  6. Relative humidity and temperature measurement
  7. Excellent quality
  8. Fast response
  9. Strong anti-interference ability
  10. Long-distance signal transmission
  11. Digital signal output
  12. Precise calibration.
  1. Dehumidifier
  2. Testing and inspection equipment
  3. Consumer goods
  4. Data loggers
  5. Weather stations
  6. Home appliances
  7. Humidity regulator


#include <dht.h>
dht DHT;
int dhtPin = 8; //Data pin of DHT-11 to Arduino digital pin 8

int chk;
float hum; //Stores humidity value
float temp; //Stores temperature value

void setup()

void loop()
DHT.read11(dhtPin); //Check data pin and read values
//Read data and store it to variables hum and temp
hum = DHT.humidity;
temp= DHT.temperature;
//Print temp and humidity values to serial monitor
Serial.print("Humidity: ");
Serial.print(" %, Temp: ");
Serial.println(" Celsius");
delay(2000); //Delay 2 sec.