#include "DHT.h" 
 
#define DHTPIN 18 
#define DHTTYPE DHT22 
 
 
int ledblue = 2; //initialized and resign variable led to pin D2 
int ledpurple = 4; 
 
DHT dht(DHTPIN, DHTTYPE); 
 
const int trigPin = 21; 
const int echoPin = 19; 
 
//define sound speed in cm/us 
#define SOUND_SPEED 0.034 
#define CM_TO_INCH 0.393701 
 
long duration; 
float distanceCm; 
float distanceInch; 
 
#include <SPI.h> 
#include <Wire.h> 
#include <Adafruit_GFX.h> 
#include <Adafruit_SSD1306.h> 
 
#define SCREEN_WIDTH 128 // OLED display width, in pixels 
#define SCREEN_HEIGHT 64 // OLED display height, in pixels 
 
// Declaration for SSD1306 display connected using I2C 
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin) 
#define SCREEN_ADDRESS 0x3C 
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); 
 
void setup() { 
  // put your setup code here, to run once: 
  Serial.begin(115200);  
  pinMode(ledblue, OUTPUT); 
  pinMode(ledpurple, OUTPUT); 
 
  dht.begin(); 
 
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output 
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input 
 
   Serial.begin(9600); 
    Serial.println(F("SSD1306 allocation failed")); 
 
 display.clearDisplay(); 
 
  // Display Text 
  display.setTextSize(1); 
  display.setTextColor(WHITE); 
  display.setCursor(0,28); 
  display.println("Hello world!"); 
  display.display(); 
  delay(2000); 
  display.clearDisplay(); 
 
  // Display Inverted Text 
  display.setTextColor(BLACK, WHITE); // 'inverted' text 
  display.setCursor(0,28); 
  display.println("Hello world!"); 
  display.display(); 
  delay(2000); 
  display.clearDisplay(); 
 
  // Changing Font Size 
  display.setTextColor(WHITE); 
  display.setCursor(0,24); 
  display.setTextSize(2); 
  display.println("Hello!"); 
  display.display(); 
  delay(2000); 
  display.clearDisplay(); 
 
  // Display Numbers 
  display.setTextSize(1); 
  display.setCursor(0,28); 
  display.println(123456789); 
  display.display(); 
  delay(2000); 
  display.clearDisplay(); 
 
  // Specifying Base For Numbers 
  display.setCursor(0,28); 
  display.print("0x"); display.print(0xFF, HEX);  
  display.print("(HEX) = "); 
  display.print(0xFF, DEC); 
  display.println("(DEC)");  
  display.display(); 
  delay(2000); 
  display.clearDisplay(); 
 
  // Display ASCII Characters 
  display.setCursor(0,24); 
  display.setTextSize(2); 
  display.write(3); 
  display.display(); 
  delay(2000); 
  display.clearDisplay(); 
 
  // Scroll full screen 
  display.setCursor(0,0); 
  display.setTextSize(1); 
  display.println("Full"); 
  display.println("screen"); 
  display.println("scrolling!"); 
  display.display(); 
  display.startscrollright(0x00, 0x07); 
  delay(2000); 
  display.stopscroll(); 
  delay(1000); 
  display.startscrollleft(0x00, 0x07); 
  delay(2000); 
  display.stopscroll(); 
  delay(1000);     
  display.startscrolldiagright(0x00, 0x07); 
  delay(2000); 
  display.startscrolldiagleft(0x00, 0x07); 
  delay(2000); 
  display.stopscroll(); 
  display.clearDisplay(); 
 
  // Scroll part of the screen 
  display.setCursor(0,0); 
  display.setTextSize(1); 
  display.println("Scroll"); 
  display.println("some part"); 
  display.println("of the screen."); 
  display.display(); 
  display.startscrollright(0x00, 0x00); 
  } 
 
 
void loop()  
{ 
  //put your main code here,to run repeatly: 
  Serial.println("Hello,ESP32!"); 
  delay(1000); //speedup simulation 1saat=1000 
  digitalWrite(ledblue, HIGH); 
  delay(3000); 
  digitalWrite(ledpurple, HIGH); 
  delay(2000); 
  digitalWrite(ledblue, LOW); 
  delay(2000); 
  digitalWrite(ledpurple, LOW); 
 
  // 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); 
 
 
  // Compute heat