Arduino Function: EthernetUDP.beginPacket

Description

It starts a connection in order to write UDP data to the remote connection.

Syntax

UDP.beginPacket(remoteIP, remotePort);

Parameters

  • remoteIP: the IP address of the remote connection (4 bytes)
  • remotePort: the port of the remote connection (int)

Returns

 Returns an int: 1 if successful 0 if there was a problem resolving the hostname or port.

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;

void setup() {
// start the Ethernet and UDP:
Ethernet.begin(mac,ip);
Udp.begin(localPort);
}

void loop() {
Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
Udp.write("hello");
Udp.endPacket();
}


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