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

const char* ssid       = "admin";
const char* password   = "12345678";

const char* ntpServer = "pool.ntp.org";
const long  gmtOffset_sec = 3600;
const int   daylightOffset_sec = 3600;

char strftime_buf[64];
void printLocalTime()
{
  struct tm timeinfo;
  setenv("TZ", "CST-3", 1);//Central Standard Time (CST) is 6 hours behind Coordinated Universal Time (UTC)
  //CST-3 === GMT+2
  tzset();
  if(!getLocalTime(&timeinfo)){
    Serial.println("Failed to obtain time");
    return;
  }

  strftime(strftime_buf, sizeof(strftime_buf), "%c", &timeinfo);
  Serial.println(strftime_buf);
}

void setup()
{
  Serial.begin(115200);
  
  //connect to WiFi
  Serial.printf("Connecting to %s ", ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.print(".");
  }
  Serial.println(" CONNECTED");
  
  //init and get the time
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
  printLocalTime();

  //disconnect WiFi as it's no longer needed
  WiFi.disconnect(true);
  WiFi.mode(WIFI_OFF);
}

void loop()
{
  delay(1000);
  printLocalTime();
}