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Ethernet : UDP.remoteIP()

remoteIP()

Description

Gets the IP address of the remote connection.

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

Syntax

UDP.remoteIP();

Parameters

None

Returns

4 bytes : the IP address of the remote connection

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; 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 IP : " ) ;     IPAddress remote = Udp.remoteIP ( ) ;
    //print out the remote connection's IP address
    Serial.print (remote) ;     Serial.print ( " on port : " ) ;
    //print out the remote connection's port
    Serial.println (Udp.remotePort ( ) ) ;
  } }

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