#include <WiFi.h>
#include "time.h"
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

const char* ssid = "BIWUOJ555";
const char* password = "11111111";
const char* ntpServer = "pool.ntp.org";
const long gmtOffset_sec = 7 * 3600;  // GMT+7 for Thailand
const int daylightOffset_sec = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2); // ตั้งค่าสำหรับจอ LCD ขนาด 16x2 และที่อยู่ I2C เป็น 0x27

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
}

void loop() {
  lcd.setCursor(0, 0);
  lcd.print("Time: ");
  printLocalTime();
  delay(1000);
}

void printLocalTime() {
  struct tm timeinfo;
  char buffer[16];
  if (getLocalTime(&timeinfo)) {
    strftime(buffer, sizeof(buffer), "%H:%M:%S", &timeinfo);
    lcd.setCursor(6, 0);
    lcd.print(buffer);
  } else {
    Serial.println("Failed to obtain time");
    lcd.setCursor(6, 0);
    lcd.print("Error");
  }
}