Arduino Function: EthernetUDP.remotePort

Description

It gets the port of the remote UDP connection. This function must be called after UDP.parsePacket().

Syntax

UDP.remotePort();

Returns

 It returns an int containing the port of the UDP connection to a remote host Int

Examples

#include <SPI.h>
#include <Ethernet.h> //If you are using Ethernet Shield 2, use instead <Ethernet2.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);
}
}


Based on the reference originally written by Arduino Community,  wiring.org.co and  arduino.cc