relaycontrol.ino

#include "DHT.h"

#define DHTPIN 2     
//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);
int relay = 14;
int relay2 = 13;

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));
  pinMode(relay, OUTPUT);
  pinMode(relay2, OUTPUT);
  dht.begin();
}

void loop() {
  // Wait a few seconds between measurements.
  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("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(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.print(hif);
  Serial.println(F("°F"));
 if(t > 30)
 {
  digitalWrite(relay, LOW);
  Serial.println("Relay 1 Hidup");
  digitalWrite(relay2, LOW);
  Serial.println("Relay 2 Hidup");
 }
 else 
 {
  digitalWrite(relay, HIGH);
  Serial.println("Relay 1 Mati");
  digitalWrite(relay2, HIGH);
  Serial.println("Relay 2 Mati");
 }
}