oled显示网络时间, wifi链接网络

// ntp_get_date.h
#include "time.h"String week[8] = {"Sun", "Mon", "Tues", "Wednes", "Thur", "Fri", "Sat"
};void printLocalTime(Adafruit_SSD1306 &display) { //打印本地时间函数struct tm timeinfo;if(!getLocalTime( & timeinfo)) {Serial.println("Failed to obtain time");return;}Serial.println(&timeinfo, "%A, %Y-%m-%d %H:%M:%S");char display_str[30] = {0};sprintf(display_str,"%04d-%02d-%02d %02d:%02d:%02d %01d", timeinfo.tm_year+1900, timeinfo.tm_mon+1, timeinfo.tm_mday, timeinfo.tm_hour, timeinfo.tm_min, timeinfo.tm_sec, timeinfo.tm_wday);display.clearDisplay();display.setCursor(0, 0);display.println(display_str);display.display();
}const char * ntpServer = "pool.ntp.org";
const long gmtOffset_sec = 28800;
const int daylightOffset_sec = 0;void ntp_get_date_init() {// 将请求数据包传输到NTP服务器，并将接收到的时间戳数据包解析为可读格式configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
}

// main.cpp
#include <Arduino.h>
#include <WiFi.h>
#include <Adafruit_SSD1306.h>
#include "ntp_get_date.h"
Adafruit_SSD1306 display = Adafruit_SSD1306(128, 32, &Wire);const char* id="Wifi账号";   //定义两个字符串指针常量
const char* psw="wifi密码";void setup() {// 串口初始化Serial.begin(115200);// oled初始化if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x32Serial.println(F("SSD1306 allocation failed"));for (;;); // Don't proceed, loop forever}display.display();delay(500); display.setTextSize(1);display.setTextColor(WHITE);display.setRotation(0);display.clearDisplay();// wifi初始化WiFi.begin(id,psw);while(WiFi.status()!=WL_CONNECTED){			//未连接上delay(500);Serial.println("connection...");}display.setCursor(0, 0);display.println("wifi connect to Wifi007 success");display.display();Serial.println("wifi connect to Wifi007 success");ntp_get_date_init();
}void loop() {printLocalTime(display);delay(500);
}