arduino+esp8266日期时间获取

#include <NTPClient.h>
// change next line to use with another board/shield
#include <ESP8266WiFi.h>
//#include <WiFi.h> // for WiFi shield
//#include <WiFi101.h> // for WiFi 101 shield or MKR1000
#include <WiFiUdp.h>

const char *ssid     = "dayuan"; //账号
const char *password = "19900625";//密码

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "ntp.aliyun.com"); //NTP地址

void setup() {
  Serial.begin(115200);

  WiFi.begin(ssid, password);

  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
  }

  timeClient.begin();
  timeClient.setTimeOffset(28800); //+1区，偏移3600，+8区，偏移3600*8
}

void loop() {
  timeClient.update();
  unsigned long epochTime = timeClient.getEpochTime();
  Serial.print("Epoch Time:");
  Serial.println(epochTime);

  //打印时间
  int currentHour = timeClient.getHours();
  Serial.print("Hour:");
  Serial.println(currentHour);
  int currentMinute = timeClient.getMinutes();
  Serial.print("Minute:");
  Serial.println(currentMinute);
  int weekDay = timeClient.getDay();
  Serial.print("Week Day:");
  Serial.println(weekDay);

  //将epochTime换算成年月日
  struct tm *ptm = gmtime((time_t *)&epochTime);
  int monthDay = ptm->tm_mday;
  Serial.print("Month day:");
  Serial.println(monthDay);
  int currentMonth = ptm->tm_mon + 1;
  Serial.print("Month:");
  Serial.println(currentMonth);

  // Serial.println(timeClient.getFormattedTime());

  delay(1000);
}