HTTP GET request mit ServerCertificateValidation & SecurityProtocol verwenden

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h>

const char* ssid = "MyWiFiName";
const char* password = "MyWifiPassword";

//My Domain name with URL path or IP address with path
String serverName = "http://192.168.200.123:55558/api/DBGeraetestatus";

// the following variables are unsigned longs because the time, measured in
// milliseconds, will quickly become a bigger number than can be stored in an int.
unsigned long lastTime = 0;
// Timer set to 10 minutes (600000)
unsigned long timerDelay = 600000;
// Set timer to 5 seconds (5000)
//unsigned long timerDelay = 5000;

void setup() {
  Serial.begin(115200); 

  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while(WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());

  Serial.println("Timer set to 5 seconds (timerDelay variable), it will take 5 seconds before publishing the first reading.");
}

void loop() {
  //Send an HTTP POST request every 10 minutes
  if ((millis() - lastTime) > timerDelay) {
    //Check WiFi connection status
    if(WiFi.status()== WL_CONNECTED){
      HTTPClient http;

      String serverPath = serverName + "?filter=ipadresse&value=192.168.200.244";
      
      // My Domain name with URL path or IP address with path
      http.begin(serverPath.c_str());
      
      // Send HTTP GET request
      int httpResponseCode = http.GET();
      
      if (httpResponseCode>0) {
        Serial.print("HTTP Response code: ");
        Serial.println(httpResponseCode);
        String payload = http.getString();
        Serial.println(payload);
      }
      else {
        Serial.print("Error code: ");
        Serial.println(httpResponseCode);
      }
      // Free resources
      http.end();
    }
    else {
      Serial.println("WiFi Disconnected");
    }
    lastTime = millis();
  }
}

private string getPinFromWebservice(string ip)
{
    Uri.TryCreate(string.Format(Constants.generatePinPath, ip), UriKind.Absolute, out requestUri);

    var request = HttpWebRequest.Create(requestUri);
    request.ContentType = "application/json";
    request.Method = "GET";

    NetworkCredential nc = new NetworkCredential("MyNetworkCredentialName", "MyNetworkCredentialPassword");
    CredentialCache cache = new CredentialCache();
    cache.Add(requestUri, "Basic", nc);
    cache.Add(requestUri, "NTLM", nc);
    request.Credentials = cache;

    ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;

    using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
    {
        using (StreamReader reader = new StreamReader(response.GetResponseStream()))
        {
            var json = reader.ReadToEnd();
            return System.Text.RegularExpressions.Regex.Replace(json, @"[^0-9]", "").ToString();
        }
    }
}

http.setAuthorization(user, password);

begin();