#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <NTPClient.h>
#include <WiFiUdp.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1  // Reset pin # (or -1 if sharing Arduino reset pin)

// Define the OLED display
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// Replace with your network credentials
//const char* ssid = "BSNL 5G";
//const char* password = "KIMAYA0207";
const char* ssid = "Wokwi-GUEST";
const char* password = "";


// Define NTP Client to get time
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP);

void setup() {
  // Initialize the display
  if(!display.begin(SSD1306_PAGEADDR, OLED_RESET)){
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  // Initialize NTP Client
  timeClient.begin();
  timeClient.setTimeOffset(3600); // UTC+1 (Change this according to your timezone)

  // Clear the display
  display.clearDisplay();
  display.display();

  // Set text size and color
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);

  // Display welcome message
  display.setCursor(0, 0);
  display.println("IoT Clock");
  display.display();
}

void loop() {
  // Get the current time from the NTP server
  timeClient.update();

  // Display the time on the OLED
  display.clearDisplay();
  display.setCursor(0, 0);
  display.print("Time: ");
  display.println(timeClient.getFormattedTime());

  display.display();

  delay(1000); // Update every second
}