创客百科

姿势共享,有节操无门槛参与的创客百科,创客动力之源 \ (^_^) /

用户工具

站点工具


en:arduino:libraries:ethernetudpremoteport

Ethernet : UDP.remotePort()

UDP.remotePort()

Description

Gets the port of the remote UDP connection.

This function must be called after UDP.parsePacket().

Syntax

UDP.remotePort();

Parameters

None

Returns

int : the port of the UDP connection to a remote host

Example

#include <SPI.h>        
#include <Ethernet.h>
#include <EthernetUdp.h>
 
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {  
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 1, 177);
 
unsigned int localPort = 8888;      // local port to listen on
 
// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;
 
char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet,
 
void setup() {
  // start the Ethernet and UDP:
  Ethernet.begin(mac,ip);
  Udp.begin(localPort);
 
}
 
void loop() {
 
  int packetSize = Udp.parsePacket();
  if(packetSize)
  {
    Serial.print("Received packet of size ");
    Serial.println(packetSize);
    Serial.print("From ");
    IPAddress remote = Udp.remoteIP();
    for (int i =0; i < 4; i++)
    {
      Serial.print(remote[i], DEC);
      if (i < 3)
      {
        Serial.print(".");
      }
    }
    Serial.print(", port ");
    Serial.println(Udp.remotePort());
 
    // read the packet into packetBufffer
    Udp.read(packetBuffer,UDP_TX_PACKET_MAX_SIZE);
    Serial.println("Contents:");
    Serial.println(packetBuffer);
 }
}

Reference Home

本页面的其他翻译:
en/arduino/libraries/ethernetudpremoteport.txt · 最后更改: 2016/12/25 22:15 (外部编辑)