DHT22

Supplies

Used materials:

Connect a wire with input 12 on the Arduino to F2 on the breadboard.
Connect the second wire with input 3V3 on the Arduino to F1.
Connect the last wire with input GND on the Arduino to F4.
Login on arduino editor to import the code from step 2.
If you open a new sketch you will see that there is already some code on it, remove that code and copy the code from step 2.
Paste the code on your empty sketch.

/* How to use the DHT-22 sensor with Arduino uno

Temperature and humidity sensor

*/

//Libraries

#include <DHT.h>;

//Constants

#define DHTPIN 7 // what pin we're connected to

#define DHTTYPE DHT22 // DHT 22 (AM2302)

DHT dht(DHTPIN, DHTTYPE); // Initialize DHT sensor for normal 16mhz Arduino

//Variables

int chk;

float hum; //Stores humidity value

float temp; //Stores temperature value

void setup()

{

Serial.begin(9600);

dht.begin();

}

void loop()

{

delay(2000);

//Read data and store it to variables hum and temp

hum = dht.readHumidity();

temp= dht.readTemperature();

//Print temp and humidity values to serial monitor

Serial.print("Humidity: ");

Serial.print(hum);

Serial.print(" %, Temp: ");

Serial.print(temp);

Serial.println(" Celsius");

delay(10000); //Delay 2 sec.

}