#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#define width 128
#define height 64
#define red 18
#define green 19
#define btn 14
Adafruit_SSD1306 oled(width, height, &Wire, -1);
const int dht_pin = 4;
int col = 16;
int row = 2;
float temp;
DHT dht(dht_pin, DHT22);
LiquidCrystal_I2C lcd(0x27, col, row);
//project by Muhammad Fikri Anwar XII mipa 4 
void setup(){
  Serial.begin(9600);
  lcd.backlight();
  lcd.init();
  dht.begin();
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(btn, INPUT);
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
  Serial.println(F("failed to start SSD1306 OLED"));
  while (1);
  oled.clearDisplay();
  }
}
void loop() {
   int status =digitalRead(btn);
   if(status==1){
   temp = dht.readTemperature(false);
   String wow = String(temp) + " Celsius"; 
   lcd.setCursor(1,1);
   lcd.print(wow);
   oled.clearDisplay();
   oled.setTextSize(2);
   oled.setTextColor(WHITE);
   oled.setCursor(30, 28);
   oled.print("DHT ON");
   oled.display();
   if(temp<=15){
   digitalWrite(green, HIGH);
   digitalWrite(red, LOW);
   lcd.setCursor(5,0);
   lcd.print("GREEN");
   }else{
   digitalWrite(green, LOW);
   digitalWrite(red, HIGH);
   lcd.setCursor(6,0);
   lcd.print("RED");
   }
   }else{
   lcd.clear();
   oled.clearDisplay();
   oled.setTextSize(2);
   oled.setTextColor(WHITE);
   oled.setCursor(26, 28);
   oled.print("DHT OFF");
   oled.setCursor(1,2);
   oled.display();
   lcd.setCursor(2, 0);
   lcd.print("Hold button !");
   lcd.setCursor(4, 1);
   lcd.print("To Check");
   digitalWrite(red, LOW);
   digitalWrite(green, LOW);
   delay(1000);
   lcd.clear();
   }
}