C# ESP32：将广播发送到本地网络，并通过Android应用程序接收广播

我写了一个小草图，让ESP建立了自己的网络：

#include <WiFi.h>

void setup() {

  Serial.begin(115200);
 
  WiFi.softAP("MyWiFiSSID", "MyWifiPW");

  IPAddress IP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(IP);
}

谁能帮我一下，或者告诉我为什么我不能接收这个广播？ESP32代码中是否有错误？或者在我的应用程序代码中（但当在网络中播放另一个C#广播时，应用程序会显示它，没问题）？还是怎么了

我真的很高兴得到每一个答案

---

致以最诚挚的问候

您是否已将带有应用程序的手机连接到ESP的WiFi网络，还是仍在您的家庭WiFi网络上？您好@ocrdu，非常感谢您的回答，没有，我已将带有应用程序的手机连接到ESP的WiFi网络，我非常确定^^

#include <AsyncUDP.h>

AsyncUDP udp;

void loop() {
  String testString = "test";
  udp.broadcastTo(testString.c_str(), 55559);

  delay(5000);
}

BroadcastReceiver broadcastReceiver;
private void OnButtonClick(object sender, EventArgs e){
    broadcastReceiver = new BroadcastReceiver();
    broadcastReceiver.ConnectSocket();
    string ip = "";
    while (!broadcastReceiver.GetBroadcast(ref ip)){ }
    FindViewById<TextView>(Resource.Id.txt).Text = broadcastReceiver.BroadcastData;
}

class BroadcastReceiver{
    public string BroadcastData{
        get{
            if (broadcastdatastring == ""){
                return "";
            }
            return broadcastdatastring;
        }
    }

    private IPEndPoint ipe;
    private Socket socket;
    private byte[] Broadcastdata = new byte[110];
    private string broadcastdatastring;

    public void ConnectSocket(){
        ipe = new IPEndPoint(IPAddress.Any, 55559);
        socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp){
            ReceiveBufferSize = 100 * 110
        };
        socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 1000);
        socket.Bind(ipe);
        return;
    }
    public bool GetBroadcast(ref string ip){
        ip = "";
        broadcastdatastring = "";

        if (socket?.Available > 0){
            var ep = (EndPoint)ipe;
            int received = socket.ReceiveFrom(Broadcastdata, ref ep);

            broadcastdatastring = Encoding.ASCII.GetString(Broadcastdata);
            ip = ((IPEndPoint)ep).Address.ToString();
        }
        return ip != "";
    }
}