esp8266 d1 mini와 lcd디스플레이를 사용하여 비트코인 시세 모니터를 만들고 있습니다. 
코드를 실행시키면 통신이 되지 않는지 디스플레이에 Connecting..., Complete! 만 출력이 되고 그 이후는 출력이 전혀되지 않습니다. 이것은 어떻게 해결하나요? (WiFi 연결 했습니다, 코드에 에러는 없습니다.)
디스플레이 영상 첨부합니다.
 
코드
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

 
WiFiClient client;
 
LiquidCrystal_I2C lcd(0x27, 16, 2);
 
HTTPClient http;
 
String payload;
 
int start_idx;
 
int end_idx ;
 
String prc;
 
int price;
 
float percent;
 
int old_price=13000000;
 
int key_blink = 0;;
 
int thehour;
 
 
void setup() {
 
  Serial.begin(115200);
  
  lcd.init();
 
  lcd.backlight();
 
  lcd.clear();
 
  lcd.setCursor(0, 0);
 
  lcd.print("Connecting...");
 
  WiFi.waitForConnectResult();
 
  lcd.setCursor(0, 1);
 
  lcd.print("Complete!");
 
  delay(500);
 
  lcd.clear();
 
}
 
 
void loop() {
 
  WiFi.waitForConnectResult();
 
  String hour=getTime().substring(17,19);
  thehour=hour.toInt();
  
  if(thehour<16){
    thehour=thehour+9;
    char buf[30]={0};
    getTime().toCharArray(buf,30); 
    lcd.setCursor(0, 0);
    lcd.print(thehour);
    lcd.setCursor(2, 0);
    lcd.print(getTime().substring(19, 22));
  }
  
  else{
    char buf[30]={0};
    getTime().toCharArray(buf,30); 
    lcd.setCursor(0,0);
    lcd.println(getTime().substring(17, 22));
  }
 
  http.begin(client, "http://api.coindesk.com/v1/bpi/currentprice/KRW.json");
 
  int httpCode = http.GET();
 
  if (httpCode == HTTP_CODE_OK) {
 
    payload = http.getString();
 
    start_idx = payload.lastIndexOf("rate_float") + 12;
 
    end_idx = payload.lastIndexOf("}}}");
 
    prc = payload.substring(start_idx, end_idx);
 
    price = (float)prc.toInt()*1.0807;
 
    lcd.setCursor(13, 1);
 
    lcd.print(key_blink == 0?"/":"|");
 
    key_blink = 1 - key_blink;
 
    if (old_price != price) {
 
        if(price > old_price){
        lcd.setCursor(9, 0);
        lcd.print("+");
        float x = price - old_price;
        float y = x/float(old_price);
        float percent = 100 * y;
        lcd.setCursor(10, 0);
        lcd.print(percent);
        lcd.setCursor(15, 0);
        lcd.print("%");
        Serial.println(price);
        Serial.println(old_price);
        Serial.println(percent);
        }
 
        if(price < old_price){
        lcd.setCursor(9, 0);
        lcd.print("-");
        float x = old_price - price;
        float y = x/float(old_price);
        float percent = 100 * y;
        lcd.setCursor(10, 0);
        lcd.print(percent);
        lcd.setCursor(15, 0);
        lcd.print("%");
        Serial.println(price);
        Serial.println(old_price);
        Serial.println(percent);
        }
        
 
      lcd.setCursor(0, 1);
 
      lcd.print("                ");
 
      lcd.setCursor(0, 1);
 
      lcd.print("KRW");
 
      lcd.setCursor(4, 1);
 
      lcd.print(price);
 
      old_price = price;
 
    }
 
  }
 
  else {
 
    lcd.setCursor(15, 0);
 
    lcd.print("ERR");
 
  }
 
  delay(1500);
 
}
 
String getTime() {
  while (!client.connect("google.com", 80)) {}
  client.print("HEAD / HTTP/1.1\r\n\r\n");
  while(!client.available()) {}
  
  while(client.available()){
    if (client.read() == '\n') {    
      if (client.read() == 'D') {    
        if (client.read() == 'a') {    
          if (client.read() == 't') {    
            if (client.read() == 'e') {    
              if (client.read() == ':') {  
                client.read();
                String timeData = client.readStringUntil('\r');
                client.stop();
                return timeData;
              }
            }
          }
        }
      }
    }
  }
}