#include <WiFi.h>
#include "DHTesp.h"
//#include "time.h"
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
 
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
 
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
 
#define NUMFLAKES     10 // Number of snowflakes in the animation example
 const int DHT_PIN = 12;
#define LOGO_HEIGHT   16
#define LOGO_WIDTH    16
DHTesp dhtSensor;
const char* ssid     = "Yehte";
const char* password = "10account";

const char* ntpServer = "pool.ntp.org";
const long  gmtOffset_sec = 28800;//格林威治時間,一格3600,GMT+8就是8*3600=28800
const int   daylightOffset_sec = 3600;
void setup(){
  Serial.begin(115200);

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3c)) { 
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
   }
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected.");
  
  // Init and get the time
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
  printLocalTime();
  WiFi.disconnect(true);//連上拿到時間資料後就切斷連線
  WiFi.mode(WIFI_OFF);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void loop(){

  printLocalTime();
  delay(10);
}

  void printLocalTime(){
  struct tm timeinfo;
  if(!getLocalTime(&timeinfo)){
    Serial.println("Failed to obtain time");
    return;
  }
  Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");//參考C++的strftime語法就會知道為甚麼這樣寫
  char myA[4];
  strftime(myA,4, "%A", &timeinfo);
  char myB[10];
  strftime(myB,10, "%B", &timeinfo);
  char mydata[3];
  strftime(mydata,3, "%d", &timeinfo);
  char myy[5];
  strftime(myy,5, "%Y", &timeinfo);
  char myHour[3];
  strftime(myHour,3, "%H", &timeinfo);
  char myMin[3];
  strftime(myMin,3, "%M", &timeinfo);
  char mySec[3];
  strftime(mySec,3, "%S", &timeinfo);
  /*Serial.println(myHour);
  String A = String(myHour);
  Serial.println(A);*/
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  display.clearDisplay();
  display.setTextColor(1);
  display.setTextSize(1);
  display.setCursor(0,10);
  display.print("Time: ");
  display.print(String(myHour,2));
  display.print(":");
  display.print(String(myMin,2));
  display.print(":");
  display.print(String(mySec,2));
  display.print(" ");
  display.print(String(myA,4));
  display.setCursor(0,20);
  display.print(String(myB,10));
  display.print(String(mydata,3));
  display.print(String(myy,5));
  display.setCursor(0,30);
  display.print("Temperature: ");
  display.print(String(data.temperature, 2));
  display.display();
}