c++ - ESP32-AsyncUDP 自带的 udp.onPacket 处理函数

Question

您能帮我在下面的示例中如何声明 udp.onPacket 的处理程序吗？

  if(udp.listen(1234)) {
        Serial.print("UDP Listening on IP: ");
        Serial.println(WiFi.localIP());
        udp.onPacket([](AsyncUDPPacket packet) {           
            Serial.print("UDP Packet Type: ");
            Serial.print(packet.isBroadcast()?"Broadcast":packet.isMulticast()?"Multicast":"Unicast");
            Serial.print(", From: ");
            Serial.print(packet.remoteIP());
            Serial.print(":");
            Serial.print(packet.remotePort());
        });
    }

我想要这样的代码

  if(udp.listen(1234)) {
        Serial.print("UDP Listening on IP: ");
        Serial.println(WiFi.localIP());
        udp.onPacket(processPacketHandler);
    }

  void processPacketHandler ...

Answer 1

我不确定 Arduino C++ 中的绑定(bind)函数。我会试试这个:

    if(udp.listen(1234)) {
        Serial.print("UDP Listening on IP: ");
        Serial.println(WiFi.localIP());
        udp.onPacket([](AsyncUDPPacket packet) { processPacketHandler(packet); });
    }

    void processPacketHandler(AsyncUDPPacket packet){ ...