Arduino and DHT11 Humidity Sensor Interface

Hi friends. Today in this instructables, I am going to show you how to use a DHT11 humidity sensor with Arduino. You can use this project for making weather station. So lets start this project !!!

Step 1: Components Needed

1.) Laptop with Arduino IDE installed

2.) USB B Type cable

3.) Arduino UNO

4.) DHT11 Humidity sensor

5.) Breadboard

6.) 3 Wires

Step 2: The Schematic

Step 3: The Code

Download the following zip. Then open Arduino IDE. Go to Sketch > Import Library or Include Library > Add library and then select the DHTLib.zip file.

DHTLib.zip

Copy the following code and open the Serial Monitor.

#include <dht.h>

dht DHT;

#define DHT11_PIN 7

void setup(){
  Serial.begin(9600);
}

void loop()
{
  int chk = DHT.read11(DHT11_PIN);
  Serial.print("Temperature = ");
  Serial.println(DHT.temperature);
  Serial.print("Humidity = ");
  Serial.println(DHT.humidity);
  delay(1000);
}