Wemos D1 Mini pro连接在http.get() 请求上被拒绝了怎么处理？

我正在尝试连接两个 Wemos D1 Mini pro（版本 1）。一个连接了 DHT22 模块，另一个使用 ESP8266HTTPClient.h 中的 HTTPClient.Get() 方法请求温度和热量指数。但我得到的只是一个“连接被拒绝”的错误。从 Web 浏览器调用“DHT22-服务器”，它就像一个魅力。
两个 Wemos 模块当然都连接到同一个 wifi 网络。我没有发布完整的客户端代码，因为它已经太长了。代码的工作原理：
只要 wifi 连接可用，自动收报机就会调用 SetBit2CallServer() 方法来设置一个标志，该标志将在 loop() 中检查以开始每 15 秒询问一次服务器。然后标志将被设置为假，直到自动收报机将其设置回真。
我在这里做错了什么？谢谢你的帮助！
爱好开发
代码：全选#include
#include

WiFiEventHandler wifiConnectHandler;

#include
const char* serverNameTemperatur = "http://192.168.178.96/KorrigierteTemperatur";
const char* serverNameHeatindex = "http://192.168.178.96/KorrigierterHeatIndex/";
Ticker CallServerTimer;
float ServerTemperature = 0;
float ServerHeatIndex = 0;
bool CallServer = false;

void SetBit2CallServer(){

  CallServer = true;
}

String httpGETRequest(const char* serverName) {
  WiFiClient client;
  HTTPClient http;
   
  // http.begin(client, "192.168.178.96", 80, "/KorrigierterHeatIndex");
  // http.begin(client, serverName);

  http.begin(client, "192.168.178.96", 80, "/KorrigierterHeatIndex");
  int httpResponseCode = http.GET();
  
  String payload = "--";
  
  if (httpResponseCode>0) {
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    payload = http.getString();
  }
  else {
    Serial.print("Error code: ");
    Serial.println(httpResponseCode);
    payload = "Error calling the temperature server. Errorcode: " + String(httpResponseCode);
  }
  // Free resources
  http.end();
  client.stop();
  return payload;
}

void onWifiConnect(const WiFiEventStationModeGotIP& event)
{
  Serial.println("Connected to Wi-Fi.");
  // Call DHT22 Server every 15 sec
   CallServerTimer.attach(15,SetBit2CallServer);
}
void setup() {
....
// neu MQTT
  wifiConnectHandler = WiFi.onStationModeGotIP(onWifiConnect);

...
}
loop() {
...
  if (CallServer == true){
    const char* HttpResult;
    char * Position;
    HttpResult = httpGETRequest(serverNameTemperatur).c_str();
    Position = strstr(HttpResult, "Error");
    if (Position != NULL){
      ServerTemperature = atof(HttpResult);
    }

    HttpResult = httpGETRequest(serverNameHeatIndex).c_str();
    Position = strstr(HttpResult, "Error");
    if (Position != NULL){
      ServerHeatIndex = atof(HttpResult);
    }
        
    CallServer = false;
  }
...
}