source: arduino-1-6-7/trunk/fuentes/arduino-ide-amd64/libraries/Ethernet/examples/UDPSendReceiveString/UDPSendReceiveString.ino @ 46

Last change on this file since 46 was 46, checked in by jrpelegrina, 4 years ago

First release to Xenial

File size: 3.0 KB
Line 
1/*
2 UDPSendReceiveString:
3 This sketch receives UDP message strings, prints them to the serial port
4 and sends an "acknowledge" string back to the sender
5
6 A Processing sketch is included at the end of file that can be used to send
7 and received messages for testing with a computer.
8
9 created 21 Aug 2010
10 by Michael Margolis
11
12 This code is in the public domain.
13 */
14
15
16#include <SPI.h>         // needed for Arduino versions later than 0018
17#include <Ethernet.h>
18#include <EthernetUdp.h>         // UDP library from: bjoern@cs.stanford.edu 12/30/2008
19
20
21// Enter a MAC address and IP address for your controller below.
22// The IP address will be dependent on your local network:
23byte mac[] = {
24  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
25};
26IPAddress ip(192, 168, 1, 177);
27
28unsigned int localPort = 8888;      // local port to listen on
29
30// buffers for receiving and sending data
31char packetBuffer[UDP_TX_PACKET_MAX_SIZE];  //buffer to hold incoming packet,
32char  ReplyBuffer[] = "acknowledged";       // a string to send back
33
34// An EthernetUDP instance to let us send and receive packets over UDP
35EthernetUDP Udp;
36
37void setup() {
38  // start the Ethernet and UDP:
39  Ethernet.begin(mac, ip);
40  Udp.begin(localPort);
41
42  Serial.begin(9600);
43}
44
45void loop() {
46  // if there's data available, read a packet
47  int packetSize = Udp.parsePacket();
48  if (packetSize) {
49    Serial.print("Received packet of size ");
50    Serial.println(packetSize);
51    Serial.print("From ");
52    IPAddress remote = Udp.remoteIP();
53    for (int i = 0; i < 4; i++) {
54      Serial.print(remote[i], DEC);
55      if (i < 3) {
56        Serial.print(".");
57      }
58    }
59    Serial.print(", port ");
60    Serial.println(Udp.remotePort());
61
62    // read the packet into packetBufffer
63    Udp.read(packetBuffer, UDP_TX_PACKET_MAX_SIZE);
64    Serial.println("Contents:");
65    Serial.println(packetBuffer);
66
67    // send a reply to the IP address and port that sent us the packet we received
68    Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
69    Udp.write(ReplyBuffer);
70    Udp.endPacket();
71  }
72  delay(10);
73}
74
75
76/*
77  Processing sketch to run with this example
78 =====================================================
79
80 // Processing UDP example to send and receive string data from Arduino
81 // press any key to send the "Hello Arduino" message
82
83
84 import hypermedia.net.*;
85
86 UDP udp;  // define the UDP object
87
88
89 void setup() {
90 udp = new UDP( this, 6000 );  // create a new datagram connection on port 6000
91 //udp.log( true );             // <-- printout the connection activity
92 udp.listen( true );           // and wait for incoming message
93 }
94
95 void draw()
96 {
97 }
98
99 void keyPressed() {
100 String ip       = "192.168.1.177";     // the remote IP address
101 int port        = 8888;                // the destination port
102
103 udp.send("Hello World", ip, port );   // the message to send
104
105 }
106
107 void receive( byte[] data ) {                  // <-- default handler
108 //void receive( byte[] data, String ip, int port ) {   // <-- extended handler
109
110 for(int i=0; i < data.length; i++)
111 print(char(data[i]));
112 println();
113 }
114 */
115
116
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