EthernetUDP.parsePacket()

Posted by On 01 / 28 / 2014 4 Comments

Description

Checks for the presence of a UDP packet, and reports the size. parsePacket() must be called before reading the buffer with Udp.read().

Syntax


Udp.parsePacket();

Parameters

None

Returns

int: the size of a received UDP packet

Example

#include <Ethernet.h>
#include <EthernetUdp.h>

// Enter an IP address for your controller below.
// The IP address will be dependent on your local network:
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(NULL,ip);
  Udp.begin(localPort);

  Serial.begin(9600);
}

void loop() {
  // if there's data available, read a packet
  int packetSize = Udp.parsePacket();
  if(packetSize)
  {
    Serial.print("Received packet of size ");
    Serial.println(packetSize);
  }
  delay(10);
}

Libraries Reference Home

The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.