root / arduino-1.0 / libraries / Ethernet / examples / UDPSendReceiveString / UDPSendReceiveString.ino @ 58d82c77
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1 | 58d82c77 | Tom Mullins | /* |
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2 | UDPSendReceive.pde: |
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3 | This sketch receives UDP message strings, prints them to the serial port |
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4 | and sends an "acknowledge" string back to the sender |
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5 | |||
6 | A Processing sketch is included at the end of file that can be used to send |
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7 | and received messages for testing with a computer. |
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8 | |||
9 | created 21 Aug 2010 |
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10 | by Michael Margolis |
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11 | |||
12 | This code is in the public domain. |
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13 | */ |
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14 | |||
15 | |||
16 | #include <SPI.h> // needed for Arduino versions later than 0018 |
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17 | #include <Ethernet.h> |
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18 | #include <EthernetUdp.h> // UDP library from: bjoern@cs.stanford.edu 12/30/2008 |
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19 | |||
20 | |||
21 | // Enter a MAC address and IP address for your controller below. |
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22 | // The IP address will be dependent on your local network: |
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23 | byte mac[] = { |
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24 | 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; |
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25 | IPAddress ip(192, 168, 1, 177); |
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26 | |||
27 | unsigned int localPort = 8888; // local port to listen on |
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28 | |||
29 | // buffers for receiving and sending data |
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30 | char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet, |
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31 | char ReplyBuffer[] = "acknowledged"; // a string to send back |
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32 | |||
33 | // An EthernetUDP instance to let us send and receive packets over UDP |
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34 | EthernetUDP Udp; |
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35 | |||
36 | void setup() { |
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37 | // start the Ethernet and UDP: |
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38 | Ethernet.begin(mac,ip); |
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39 | Udp.begin(localPort); |
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40 | |||
41 | Serial.begin(9600); |
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42 | } |
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43 | |||
44 | void loop() { |
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45 | // if there's data available, read a packet |
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46 | int packetSize = Udp.parsePacket(); |
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47 | if(packetSize) |
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48 | { |
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49 | Serial.print("Received packet of size "); |
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50 | Serial.println(packetSize); |
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51 | Serial.print("From "); |
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52 | IPAddress remote = Udp.remoteIP(); |
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53 | for (int i =0; i < 4; i++) |
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54 | { |
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55 | Serial.print(remote[i], DEC); |
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56 | if (i < 3) |
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57 | { |
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58 | Serial.print("."); |
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59 | } |
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60 | } |
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61 | Serial.print(", port "); |
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62 | Serial.println(Udp.remotePort()); |
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63 | |||
64 | // read the packet into packetBufffer |
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65 | Udp.read(packetBuffer,UDP_TX_PACKET_MAX_SIZE); |
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66 | Serial.println("Contents:"); |
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67 | Serial.println(packetBuffer); |
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68 | |||
69 | // send a reply, to the IP address and port that sent us the packet we received |
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70 | Udp.beginPacket(Udp.remoteIP(), Udp.remotePort()); |
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71 | Udp.write(ReplyBuffer); |
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72 | Udp.endPacket(); |
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73 | } |
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74 | delay(10); |
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75 | } |
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76 | |||
77 | |||
78 | /* |
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79 | Processing sketch to run with this example |
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80 | ===================================================== |
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81 | |||
82 | // Processing UDP example to send and receive string data from Arduino |
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83 | // press any key to send the "Hello Arduino" message |
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84 | |||
85 | |||
86 | import hypermedia.net.*; |
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87 | |||
88 | UDP udp; // define the UDP object |
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89 | |||
90 | |||
91 | void setup() { |
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92 | udp = new UDP( this, 6000 ); // create a new datagram connection on port 6000 |
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93 | //udp.log( true ); // <-- printout the connection activity |
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94 | udp.listen( true ); // and wait for incoming message |
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95 | } |
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96 | |||
97 | void draw() |
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98 | { |
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99 | } |
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100 | |||
101 | void keyPressed() { |
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102 | String ip = "192.168.1.177"; // the remote IP address |
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103 | int port = 8888; // the destination port |
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104 | |||
105 | udp.send("Hello World", ip, port ); // the message to send |
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106 | |||
107 | } |
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108 | |||
109 | void receive( byte[] data ) { // <-- default handler |
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110 | //void receive( byte[] data, String ip, int port ) { // <-- extended handler |
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111 | |||
112 | for(int i=0; i < data.length; i++) |
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113 | print(char(data[i])); |
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114 | println(); |
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115 | } |
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116 | */ |
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117 |