#include <HTTPClient.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
#include <WiFi.h>
const char* ssid = "Wokwi-GUEST";
const char* password = "";

const String url = "http://web.mgiga.com.tw/mgiga_ajax.jsp?action=GET_CURRENT_DATETIME";

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  //非同步wifi連線
  Serial.println("connecting to wifi");
  while( WiFi.status() != WL_CONNECTED){
    delay(500);
    Serial.print(".");
    //連線中
    }
  lcd.init(); 
  lcd.backlight(); 
  Serial.print("ok! ip=");
  //連線成功到網頁端
  Serial.println(WiFi.localIP());
  //顯示IP
  
}

void loop() {
  HTTPClient http;
  http.begin(url);
    //HTTP request請求連線
  int httpResponseCode = http.GET();
    //重要
  Serial.print(httpResponseCode);
  if(httpResponseCode >0){
    Serial.print("HTTP OK!");
    //連線成功的回應
    String payload = http.getString();
    //把回應的網頁資訊丟給payload再轉成字串
    Serial.println();
    Serial.println(payload);
    int ind1 = payload.indexOf("[RESP]");
    int ind2 = payload.indexOf("[/RESP]");
    //印出網頁回應的字串
    Serial.println(ind1);
    Serial.println(ind2);
    String strD = payload.substring(ind1+6,ind2-8);
    String strT = payload.substring(ind1+14,ind2);
    lcd.setCursor(1,0);//設定游標
    lcd.print(strD);//印出文字
    lcd.setCursor(1,1);//設定游標
    lcd.print(strT);//印出文字
  }else{
    Serial.print("Error code");
    //連線失敗的回應
  }
  delay(1000);
}