set_time.cpp

void setup() {
  
  // Everything else
 
  startCameraServer();

  Serial.print("Camera Ready! Use 'http://");
  Serial.print(WiFi.localIP());
  Serial.println("' to connect");

  // Set system time
  if (WiFi.status() == WL_CONNECTED) { // Connected to WiFi
    internet_connected = true;
    Serial.println("Internet connected");
    init_time();
    time(&now);
    // Set timezone to Indian Standard Time
    setenv("TZ", "UTC-05:30", 1);
    tzset();
  }
}

void init_time()
{
  sntp_setoperatingmode(SNTP_OPMODE_POLL);
  sntp_setservername(0, "pool.ntp.org");
  sntp_init();
  // wait for time to be set
  time_t now = 0;
  timeinfo = { 0 };
  int retry = 0;
  const int retry_count = 10;
  while (timeinfo.tm_year < (2016 - 1900) && ++retry < retry_count) {
    Serial.printf("Waiting for system time to be set... (%d/%d)\n", retry, retry_count);
    delay(2000);
    time(&now);
    localtime_r(&now, &timeinfo);
  }
}