官方提供的例程很詳盡，本程式設定了時區引數gmtOffset_sec為8*60*60

#include <M5Stack.h>
#include <WiFi.h>
#include "time.h"

// Set the name and password of the wifi to be connected.  配置所連線wifi的名稱和密碼
const char* ssid       = "就是WiFi的名稱";
const char* password   = "";

const char* ntpServer = "time1.aliyun.com"; //Set the connect NTP server.  設定連線的NTP伺服器
 

const long  gmtOffset_sec = 28800;//這裡採用UTC計時，中國為東八區，就是 8*60*60
const int   daylightOffset_sec = 3600;
struct tm timeinfo;
void printLocalTime(){  //Output current time.  輸出當前時間
  if(!getLocalTime(&timeinfo)){ //Return 1 when the time is successfully obtained.  成功獲取到時間返回1
    M5.Lcd.println("Failed to obtain time
 
");
    return;
  }
  M5.Lcd.println(&timeinfo, "%A, %B %d \n%Y %H:%M:%S");  //Screen prints date and time.  螢幕列印日期和時間
}

void setup(){
  M5.begin(); //Init M5Core.  初始化 M5Core
  M5.Lcd.setTextSize(3);  //Set the font size to 3.  設定字號大小為3
  M5.Lcd.printf("\nConnecting to %s", ssid);
  WiFi.begin(ssid, password); 
 
//Connect wifi and return connection status.  連線wifi並返回連線狀態
  while(WiFi.status() != WL_CONNECTED) { //If the wifi connection fails.  若wifi未連線成功
    delay(500); //delay 0.5s.  延遲0.5s
    M5.Lcd.print(".");
  }
  M5.Lcd.println("\nCONNECTED!");
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer); //init and get the time.  初始化並設定NTP
  getLocalTime(&timeinfo);//必須要獲取一下
  WiFi.disconnect(true);  //Disconnect wifi.  斷開wifi連線
  WiFi.mode(WIFI_OFF);  //Set the wifi mode to off.  設定wifi模式為關閉
  M5.Lcd.fillScreen(BLACK);
  delay(20);
}

void loop(){
  delay(1000);
  M5.Lcd.setCursor(0,50); //設定游標處於(0,50)
  printLocalTime();
}