View source for Arduino: DHT22 sensor suhu dan humidity

DHT-22 (juga dikenal sebagai AM2302) adalah digital-output, sensor relative humidity dan sensor temperature. Ia menggunakan sensor kelembaban kapasitif dan termistor untuk mengukur udara di sekitarnya, dan mengirimkan sinyal digital pada pin data.

==Gambar==

[[File:Dht22 sensor.jpg.png|center|200px|thumb]]

[[File:Humidity sensor breadboard.jpg.png|center|400px|thumb]]

==Source Code==



 // Example testing sketch for various DHT humidity/temperature sensors
 
 #include "DHT.h"
 #define DHTPIN 2 // what digital pin we're connected to
 // Uncomment whatever type you're using!
 //#define DHTTYPE DHT11 // DHT 11
 #define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
 //#define DHTTYPE DHT21 // DHT 21 (AM2301)
 // Connect pin 1 (on the left) of the sensor to +5V
 // NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
 // to 3.3V instead of 5V!
 // Connect pin 2 of the sensor to whatever your DHTPIN is
 // Connect pin 4 (on the right) of the sensor to GROUND
 // Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
 // Initialize DHT sensor.
 // Note that older versions of this library took an optional third parameter to
 // tweak the timings for faster processors. This parameter is no longer needed
 // as the current DHT reading algorithm adjusts itself to work on faster procs.
 DHT dht(DHTPIN, DHTTYPE);
 
 void setup() {
    Serial.begin(9600);
    Serial.println("DHTxx test!");
    dht.begin();
 } 
 
 void loop() {
    delay(2000); // Wait a few seconds between measurements
    float h = dht.readHumidity();
    // Reading temperature or humidity takes about 250 milliseconds!
    float t = dht.readTemperature();
    // Read temperature as Celsius (the default)
    float f = dht.readTemperature(true);
    // Read temperature as Fahrenheit (isFahrenheit = true)
    // Check if any reads failed and exit early (to try again).
    if (isnan(h) || isnan(t) || isnan(f)) {
       Serial.println("Failed to read from DHT sensor!");
       return;
    }
    
    // Compute heat index in Fahrenheit (the default)
    float hif = dht.computeHeatIndex(f, h);
    // Compute heat index in Celsius (isFahreheit = false)
    float hic = dht.computeHeatIndex(t, h, false);
    Serial.print ("Humidity: ");
    Serial.print (h);
    Serial.print (" %\t");
    Serial.print ("Temperature: ");
    Serial.print (t);
    Serial.print (" *C ");
    Serial.print (f);
    Serial.print (" *F\t");
    Serial.print ("Heat index: ");
    Serial.print (hic);
    Serial.print (" *C ");
    Serial.print (hif);
    Serial.println (" *F");
 }

==Pranala Menarik==

* [[Arduino]]