Brauche Programmierhilfe Wlan

/**
   aus BasicHTTPClient.ino
   Created on: 24.04.2023
*/
//#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h>

ESP8266WiFiMulti WiFiMulti;
String x1;
int Wert;
//**********************************
void setup()
{
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(115200);

  for (uint8_t t = 4; t > 0; t--)
  {
    Serial.printf("[SETUP] WAIT %d...\n", t);
    Serial.flush();
    delay(1000);
  }
  WiFi.mode(WIFI_STA);
  WiFiMulti.addAP("shellyem3-3494547B8D61", "");
}
//*******************************
void loop()
{
  // wait for WiFi connection
  if ((WiFiMulti.run() == WL_CONNECTED))
  {
    WiFiClient client;
    HTTPClient http;

    if (http.begin(client, "http://192.168.33.1/status"))
    {
      int httpCode = http.GET();   // start connection and send HTTP header
      if (httpCode > 0)            // httpCode will be negative on error
      {
        // HTTP header has been send and Server response header has been handled
        //Serial.printf("[HTTP] GET... code: %d\n", httpCode);

        // file found at server
        if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY)
        {
          String payload = http.getString();
          Wert = 0;
          for (uint16 s = 400; s < 750; s++)
          {
            String A = payload.substring(s, s + 5);
            if (A == "power")
            {
              s = s + 7;
              //======================
              x1 = payload.substring(s , s + 10);
              Serial. print (x1.toInt()) ;
              Serial. print ("   ") ;
              Wert = Wert + x1.toInt() ;
              

              s = s + 10;
              //=========================
            } 
          }    
              Serial. println (Wert) ;
              digitalWrite(LED_BUILTIN, HIGH);
              delayMicroseconds(5000+Wert);
              digitalWrite(LED_BUILTIN, LOW);
              delay(1000);                  
        }
        else
        {
          Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
        }
      }
    }
    //delay(2000);
  }
}