[211] | 1 | /*
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| 2 | PubNub sample client
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| 3 |
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| 4 | This sample client will publish raw (JSON pre-encoded) PubNub messages.
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| 5 |
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| 6 | Circuit:
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| 7 | * Ethernet shield attached to pins 10, 11, 12, 13
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| 8 | * (Optional.) Analog sensors on pins A0 to A5.
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| 9 | * (Optional.) LED on pin 9 for success indication.
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| 10 |
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| 11 | created 23 October 2012
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| 12 | by Petr Baudis
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| 13 |
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| 14 | https://github.com/pubnub/pubnub-api/tree/master/arduino
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| 15 | This code is in the public domain.
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| 16 | */
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| 17 |
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| 18 | #include <SPI.h>
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| 19 | #include <Ethernet.h>
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| 20 | #include <PubNub.h>
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| 21 |
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| 22 | // Some Ethernet shields have a MAC address printed on a sticker on the shield;
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| 23 | // fill in that address here, or choose your own at random:
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| 24 | byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
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| 25 |
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| 26 | const int pubLedPin = 9;
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| 27 |
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| 28 | char pubkey[] = "demo";
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| 29 | char subkey[] = "demo";
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| 30 | char channel[] = "hello_world";
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| 31 |
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| 32 | void setup()
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| 33 | {
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| 34 | pinMode(pubLedPin, OUTPUT);
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| 35 | digitalWrite(pubLedPin, LOW);
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| 36 |
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| 37 | Serial.begin(9600);
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| 38 | Serial.println("Serial set up");
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| 39 |
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| 40 | while (!Ethernet.begin(mac)) {
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| 41 | Serial.println("Ethernet setup error");
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| 42 | delay(1000);
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| 43 | }
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| 44 | Serial.println("Ethernet set up");
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| 45 |
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| 46 | PubNub.begin(pubkey, subkey);
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| 47 | Serial.println("PubNub set up");
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| 48 | }
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| 49 |
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| 50 | void flash(int ledPin)
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| 51 | {
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| 52 | /* Flash LED three times. */
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| 53 | for (int i = 0; i < 3; i++) {
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| 54 | digitalWrite(ledPin, HIGH);
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| 55 | delay(100);
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| 56 | digitalWrite(ledPin, LOW);
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| 57 | delay(100);
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| 58 | }
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| 59 | }
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| 60 |
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| 61 | void loop()
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| 62 | {
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| 63 | Ethernet.maintain();
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| 64 |
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| 65 | EthernetClient *client;
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| 66 |
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| 67 | char msg[64] = "{\"analog\":[";
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| 68 | for (int i = 0; i < 6; i++) {
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| 69 | sprintf(msg + strlen(msg), "%d", analogRead(i));
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| 70 | if (i < 5)
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| 71 | strcat(msg, ",");
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| 72 | }
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| 73 | strcat(msg, "]}");
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| 74 |
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| 75 | Serial.print("publishing message: ");
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| 76 | Serial.println(msg);
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| 77 | client = PubNub.publish(channel, msg);
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| 78 | if (!client) {
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| 79 | Serial.println("publishing error");
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| 80 | } else {
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| 81 | flash(pubLedPin);
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| 82 | client->stop();
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| 83 | }
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| 84 |
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| 85 | delay(5000);
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| 86 | }
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