#if defined(ESP8266)
#include <ESP8266WiFi.h>
#elif defined(ESP32)
#include <WiFi.h>
#endif

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

#define SCREEN_WIDTH 128 
#define SCREEN_HEIGHT 64 
int ECHO_PIN = 19;
int TRIG_PIN = 18;


Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);


void setup() {
  // put your setup code here, to run once:
  // Serial.begin(115200);
  // Serial.println("Hello, ESP32!");
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  Serial.begin(9600);
  pinMode(ECHO_PIN, INPUT);
  pinMode(TRIG_PIN, OUTPUT);

  }

  float ultrasonik(){
    digitalWrite(TRIG_PIN, LOW);
    delayMicroseconds(2);
    digitalWrite(TRIG_PIN, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIG_PIN, LOW);
    int duration = pulseIn(ECHO_PIN, HIGH);
    return duration * 0.034 / 2;
  }

void loop() {
  float jarak = ultrasonik();
    if(jarak > 200){
      Serial.println("Jarak Jauh!");
      Serial.print("Nilai jarak :");
      Serial.print(jarak);
      Serial.println(" cm      ");
      delay(1000);    
    }
  
  // put your main code here, to run repeatedly:
  display.clearDisplay();
  display.setTextSize(2);             
  display.setTextColor(WHITE);        
  display.setCursor(0,20);             
  display.println("Tinggi Anda :");
  display.setCursor(0,30);             
  display.println(jarak);
  display.display();
  delay(2000);
}