#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#include "DHT.h"

#define DHTPIN 2    

#define DHTTYPE DHT22   
DHT dht(DHTPIN, DHTTYPE);
const int LEDPANAS = 5;              
const int LEDSEDANG = 6;               
const int LEDDINGIN = 7;
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
int buzzerPin = 8;

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); // Don't proceed, loop forever
  }
  display.clearDisplay();
  dht.begin();
  pinMode(buzzerPin, OUTPUT);
  pinMode(LEDPANAS, OUTPUT);          
  pinMode(LEDSEDANG, OUTPUT);         
  pinMode(LEDDINGIN, OUTPUT);  
   digitalWrite(LEDPANAS,LOW);          
  digitalWrite(LEDSEDANG,LOW);         
  digitalWrite(LEDDINGIN, LOW);
  digitalWrite(buzzerPin,LOW); 
 }

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>35){                           // See if the temperature is bigger than 22C.
  digitalWrite(LEDPANAS,HIGH);           // Turn off LED.
  digitalWrite(LEDSEDANG,LOW);         // Turn off LED.
  digitalWrite(LEDDINGIN, LOW);
  digitalWrite(buzzerPin, HIGH);
  tone(buzzerPin, 391);
  Serial.println(F("LEDPANAS"));
  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(5, 15);
  display.print("SUHU PANAS");
  display.display();

  }
if(18 < t && t < 35){                           // See if the temperature is bigger than 22C.
  digitalWrite(LEDPANAS,LOW);           // Turn off LED.
  digitalWrite(LEDSEDANG,HIGH);         // Turn off LED.
  digitalWrite(LEDDINGIN, LOW);
  digitalWrite(buzzerPin, LOW);
  noTone(buzzerPin);
  Serial.println(F("LEDSEDANG"));
  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(5, 15);
  display.print("SUHU CUKUP");
  display.display();

  }
  else if (t<29){                           // See if the temperature is bigger than 22C.
  digitalWrite(LEDPANAS,LOW);           // Turn off LED.
  digitalWrite(LEDSEDANG,LOW);         // Turn off LED.
  digitalWrite(LEDDINGIN, HIGH);
  digitalWrite(buzzerPin, LOW);
  noTone(buzzerPin);
  Serial.println(F("SUHU DINGIN"));
  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(5, 15);
  display.print("SUHU DINGIN");
  display.display();

  }
}