使用NTP服务需要先安装 NTPClient 库，在库管理中搜索NTP进行下载

1. 项目->加载库->管理库
2. 搜索ntp，安装NTPClient库

#include <NTPClient.h>
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>

const char *ssid     = "abcd";
const char *password = "12345678";
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "ntp1.aliyun.com",60*60*8, 30*60*1000);

void setup(){
  Serial.begin(9600);
  WiFi.begin(ssid, password);
  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
  }
  Serial.println("");
  Serial.println(WiFi.localIP());   //打印出当前IP地址
  timeClient.begin();
}
void loop() {
  timeClient.update();
  Serial.println(timeClient.getFormattedTime());
  int hours = timeClient.getHours();    //获取小时
  int minu =  timeClient.getMinutes();  //获取分钟
  int sece =  timeClient.getSeconds();  //获取秒
  Serial.printf("hour:%d minu:%d sece:%d\n", hours,minu,sece);
  delay(10000);
}