Published April 17, 2016 © Apache-2.0

Temperature Monitoring With DHT22 & Arduino

Simple Temperature Monitoring with DHT22 & Arduino.

BeginnerProtip1 hour374,961

Things used in this project

Hardware components

Arduino UNO

DHT22 Temperature Sensor

Breadboard (generic)

Jumper wires (generic)

Story

This is very simple and small post but always simple and small things make smart and enterprise products. Any way it's my dream that i write a program from that i can check my room temperature and humidity instead of watching from small devices.

I am using DHT22 Temperature and Humidity sensor with Arduino UNO R3 and getting it's data from Arduino Serial Monitor. Before i go to next step i think i need to tell you some thing about DHT22. It's Humidity Range is 0-100% and Temperature range is -40 - 125°C that's why I prefer DHT22 as compared to DHT11.

Update: Hello Geeks, I have written a new article regarding DHT22, MKR Wi-Fi 1010, and the Arduino IoT Cloud, click here to learn more.

For Complete steps, setup & output please watch the video.

Hardware Required:

1x Arduino/Genuino UNO View at Amazon

1x DHT22 Sensor View at Amazon

1x Bread Board View at Amazon

3x Jumper Wires View at Amazon

Let's Begin buddies.

First Pin is a VCC connect it to 5V.

Second Pin is Data Pin Connect it to Digital Pin 7.

Third Pin is called NC but i don't know why it's their i did not used it.

And Finally Fourth Pin is Ground Pin my favorite Pin.

Now upload the code to arduino and wait for ...... output :)

Video For Complete Steps & Output:

Please find the Code in Attachment.

Code

Arduino DHT22 Code

/* 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.
}

Credits

Muhammad Afzal

25 projects • 117 followers

I am Software Eng having 13+ Years of experience. Hackster.io & Cayenne Mydevices Ambassador in Pakistan.

Thanks to Michalis Vasilakis.

Temperature Monitoring With DHT22 & Arduino

Things used in this project

Hardware components

Story

Schematics

DHT22 Code

Code

Arduino DHT22 Code

Credits

Muhammad Afzal

Comments

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Temperature Monitoring With DHT22 & Arduino

Temperature Monitoring With DHT22 & Arduino

Things used in this project

Hardware components

Story

Schematics

DHT22 Code

Code

Arduino DHT22 Code

Credits

Muhammad Afzal

Comments

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