Ethernet : UDP.remoteIP()
Gets the IP address of the remote connection.
This function must be called after UDP.parsePacket().
UDP.remoteIP();
None
4 bytes : the IP address of the remote connection
#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()); } }