1 | /*
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2 | Telnet client
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3 |
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4 | This sketch connects to a a telnet server (http://www.google.com)
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5 | using an Arduino Wiznet Ethernet shield. You'll need a telnet server
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6 | to test this with.
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7 | Processing's ChatServer example (part of the network library) works well,
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8 | running on port 10002. It can be found as part of the examples
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9 | in the Processing application, available at
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10 | http://processing.org/
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11 |
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12 | Circuit:
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13 | * Ethernet shield attached to pins 10, 11, 12, 13
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14 |
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15 | created 14 Sep 2010
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16 | modified 9 Apr 2012
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17 | by Tom Igoe
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18 |
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19 | */
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20 |
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21 | #include <SPI.h>
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22 | #include <Ethernet2.h>
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23 |
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24 | // Enter a MAC address and IP address for your controller below.
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25 | // The IP address will be dependent on your local network:
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26 | byte mac[] = {
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27 | 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
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28 | };
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29 | IPAddress ip(192, 168, 1, 177);
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30 |
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31 | // Enter the IP address of the server you're connecting to:
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32 | IPAddress server(1, 1, 1, 1);
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33 |
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34 | // Initialize the Ethernet client library
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35 | // with the IP address and port of the server
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36 | // that you want to connect to (port 23 is default for telnet;
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37 | // if you're using Processing's ChatServer, use port 10002):
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38 | EthernetClient client;
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39 |
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40 | void setup() {
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41 | // start the Ethernet connection:
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42 | Ethernet.begin(mac, ip);
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43 | // Open serial communications and wait for port to open:
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44 | Serial.begin(9600);
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45 | while (!Serial) {
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46 | ; // wait for serial port to connect. Needed for Leonardo only
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47 | }
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48 |
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49 |
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50 | // give the Ethernet shield a second to initialize:
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51 | delay(1000);
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52 | Serial.println("connecting...");
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53 |
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54 | // if you get a connection, report back via serial:
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55 | if (client.connect(server, 10002)) {
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56 | Serial.println("connected");
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57 | }
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58 | else {
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59 | // if you didn't get a connection to the server:
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60 | Serial.println("connection failed");
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61 | }
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62 | }
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63 |
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64 | void loop()
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65 | {
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66 | // if there are incoming bytes available
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67 | // from the server, read them and print them:
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68 | if (client.available()) {
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69 | char c = client.read();
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70 | Serial.print(c);
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71 | }
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72 |
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73 | // as long as there are bytes in the serial queue,
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74 | // read them and send them out the socket if it's open:
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75 | while (Serial.available() > 0) {
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76 | char inChar = Serial.read();
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77 | if (client.connected()) {
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78 | client.print(inChar);
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79 | }
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80 | }
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81 |
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82 | // if the server's disconnected, stop the client:
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83 | if (!client.connected()) {
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84 | Serial.println();
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85 | Serial.println("disconnecting.");
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86 | client.stop();
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87 | // do nothing:
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88 | while (true);
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89 | }
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90 | }
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91 |
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92 |
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93 |
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94 |
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