#include <Wire.h>
#include "SSD1306.h" 
#include <ESP8266WiFi.h>


const char* ssid = "XXXXXXXXXXXXX";
const char* password =  "XXXXXXXXX";
 
//NTP関連
//struct tm timeInfo;
char date[20],hour_minute[20];

SSD1306  display(0x3c, 4, 5);
 
void setup() {
  Serial.begin(115200);
  
  display.init();//SSD1306を初期化
  
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi..");
  }
  Serial.println("Connected to the WiFi network");
  
  configTime(-9 * 3600L, 0, "ntp.nict.jp", "time.google.com", "ntp.jst.mfeed.ad.jp");//NTPの設定

}


void show_time(){
  time_t t;
  struct tm *tm;
  static const char *wd[7] = {"Sun","Mon","Tue","Wed","Thr","Fri","Sat"};

  t = time(NULL);
  tm = localtime(&t);
//  getLocalTime(&timeInfo);//tmオブジェクトのtimeInfoに現在時刻を入れ込む
  sprintf(date, "%04d/%02d/%02d (%s)",tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
          wd[tm->tm_wday]);//日付に変換
  sprintf(hour_minute, "%02d:%02d",tm->tm_hour, tm->tm_min);//時間に変換
  Serial.println(date);
  Serial.println(hour_minute);
  display.clear();
  //日付を上の方に表示
  display.setFont(ArialMT_Plain_16);
  display.drawString(0, 0, date);
  //時間を中央に大きく表示
  display.setFont(ArialMT_Plain_24);
  display.drawString(20, 20, hour_minute);
  display.display();
}
 
void loop() {
  if ((WiFi.status() == WL_CONNECTED)) {
    show_time();
    delay(15000);
  }
}