[211] | 1 | /*
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| 2 | PubNub sample client
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| 3 |
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| 4 | This sample client will use just the minimal-footprint raw PubNub
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| 5 | interface where it is your responsibility to deal with the JSON encoding.
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| 6 |
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| 7 | It will just send a hello world message and retrieve one back, reporting
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| 8 | its deeds on serial console.
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| 9 |
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| 10 | Circuit:
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| 11 | * Ethernet shield attached to pins 10, 11, 12, 13
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| 12 | * (Optional.) LED on pin 8 for reception indication.
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| 13 | * (Optional.) LED on pin 9 for publish indication.
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| 14 |
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| 15 | created 23 October 2012
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| 16 | by Petr Baudis
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| 17 |
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| 18 | https://github.com/pubnub/pubnub-api/tree/master/arduino
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| 19 | This code is in the public domain.
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| 20 | */
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| 21 |
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| 22 | #include <SPI.h>
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| 23 | #include <Ethernet.h>
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| 24 | #include <PubNub.h>
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| 25 |
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| 26 | // Some Ethernet shields have a MAC address printed on a sticker on the shield;
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| 27 | // fill in that address here, or choose your own at random:
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| 28 | byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
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| 29 |
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| 30 | const int subLedPin = 8;
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| 31 | const int pubLedPin = 9;
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| 32 |
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| 33 | char pubkey[] = "demo";
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| 34 | char subkey[] = "demo";
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| 35 | char channel[] = "hello_world";
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| 36 |
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| 37 | void setup()
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| 38 | {
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| 39 | pinMode(subLedPin, OUTPUT);
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| 40 | pinMode(pubLedPin, OUTPUT);
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| 41 | digitalWrite(subLedPin, LOW);
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| 42 | digitalWrite(pubLedPin, LOW);
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| 43 |
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| 44 | Serial.begin(9600);
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| 45 | Serial.println("Serial set up");
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| 46 |
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| 47 | while (!Ethernet.begin(mac)) {
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| 48 | Serial.println("Ethernet setup error");
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| 49 | delay(1000);
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| 50 | }
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| 51 | Serial.println("Ethernet set up");
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| 52 |
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| 53 | PubNub.begin(pubkey, subkey);
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| 54 | Serial.println("PubNub set up");
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| 55 | }
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| 56 |
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| 57 | void flash(int ledPin)
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| 58 | {
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| 59 | /* Flash LED three times. */
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| 60 | for (int i = 0; i < 3; i++) {
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| 61 | digitalWrite(ledPin, HIGH);
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| 62 | delay(100);
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| 63 | digitalWrite(ledPin, LOW);
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| 64 | delay(100);
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| 65 | }
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| 66 | }
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| 67 |
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| 68 | void loop()
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| 69 | {
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| 70 | Ethernet.maintain();
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| 71 |
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| 72 | EthernetClient *client;
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| 73 |
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| 74 | Serial.println("publishing a message");
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| 75 | client = PubNub.publish(channel, "\"\\\"Hello world!\\\" she said.\"");
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| 76 | if (!client) {
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| 77 | Serial.println("publishing error");
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| 78 | delay(1000);
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| 79 | return;
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| 80 | }
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| 81 | while (client->connected()) {
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| 82 | while (client->connected() && !client->available()) ; // wait
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| 83 | char c = client->read();
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| 84 | Serial.print(c);
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| 85 | }
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| 86 | client->stop();
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| 87 | Serial.println();
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| 88 | flash(pubLedPin);
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| 89 |
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| 90 | Serial.println("waiting for a message (subscribe)");
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| 91 | PubSubClient *pclient = PubNub.subscribe(channel);
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| 92 | if (!pclient) {
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| 93 | Serial.println("subscription error");
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| 94 | delay(1000);
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| 95 | return;
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| 96 | }
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| 97 | while (pclient->wait_for_data()) {
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| 98 | char c = pclient->read();
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| 99 | Serial.print(c);
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| 100 | }
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| 101 | pclient->stop();
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| 102 | Serial.println();
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| 103 | flash(subLedPin);
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| 104 |
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| 105 | Serial.println("retrieving message history");
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| 106 | client = PubNub.history(channel);
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| 107 | if (!client) {
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| 108 | Serial.println("history error");
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| 109 | delay(1000);
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| 110 | return;
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| 111 | }
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| 112 | while (client->connected()) {
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| 113 | while (client->connected() && !client->available()) ; // wait
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| 114 | char c = client->read();
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| 115 | Serial.print(c);
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| 116 | }
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| 117 | client->stop();
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| 118 | Serial.println();
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| 119 |
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| 120 | delay(10000);
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| 121 | }
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