#include <Adafruit_SSD1306.h>
 //include libraries
#include <WiFi.h>
#include <WiFiUdp.h>
#include <NTPClient.h>

const char* ssid="Wokwi-GUEST";
const char* pass="";

const long offset=19800;
const char* server="asia.pool.ntp.org";
const long interval=6000;
int inter=500;
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP,server,offset,interval);

// OLED display width and height, in pixels
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
 
// Declaration for SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET    -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
 
void setup() {
  // Existing setup code...
  
  // Initialize OLED Display
    Serial.println("wifi connecting");
  //initialize the wifi and ntpclint
  WiFi.begin(ssid,pass);

  while(WiFi.status()!=WL_CONNECTED){
    Serial.println(".");
    delay(500);
    }
  Serial.println("\nwifi connected ");
  Serial.println("ip address");
  Serial.print(WiFi.localIP());

  timeClient.begin();
  timeClient.update();
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  
  // Clear the buffer
  display.clearDisplay();
  
  // Display initial message
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.println("ESP32 NTP Time");
  display.display();
}
 
void loop() {
  // Existing loop code...
  
  if(timeClient.update()) {
    String formattedTime = timeClient.getFormattedTime();
    
    // Update OLED Display
    display.clearDisplay();
    display.setTextSize(2);
    display.setTextColor(SSD1306_WHITE);
    display.setCursor(0,10);
    display.println(formattedTime);
    display.display();
    
    // Serial output as before
    // ...
  }
  
  // Other tasks...
}