Onnowpurbo: Created page with " /* Basic MQTT example with Authentication - connects to an MQTT server, providing username and password - publishes "hello world" to the topic "outTopic" -..."

2017-05-10T22:10:42Z

Created page with " /* Basic MQTT example with Authentication - connects to an MQTT server, providing username and password - publishes "hello world" to the topic "outTopic" -..."

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/*
Basic MQTT example with Authentication

- connects to an MQTT server, providing username
and password
- publishes "hello world" to the topic "outTopic"
- subscribes to the topic "inTopic"
*/

#include <SPI.h>
#include <Ethernet.h>
#include <PubSubClient.h>

// Update these with values suitable for your network.
byte mac[] = { 0xDE, 0xED, 0xBA, 0xFE, 0xFE, 0xED };
IPAddress ip(192, 168, 0, 4);
IPAddress server(192, 168, 0, 100);

void callback(char* topic, byte* payload, unsigned int length) {
// handle message arrived
}

EthernetClient ethClient;
PubSubClient client(server, 1883, callback, ethClient);

void setup()
{
Ethernet.begin(mac, ip);
// Note - the default maximum packet size is 128 bytes. If the
// combined length of clientId, username and password exceed this,
// you will need to increase the value of MQTT_MAX_PACKET_SIZE in
// PubSubClient.h

if (client.connect("arduinoClient", "mqtt-spy", "123456")) {
client.publish("outTopic","hello world");
client.subscribe("inTopic");
}
}

void loop()
{
client.loop();
}

MQTT: Arduino Authentication - Revision history

Onnowpurbo: Created page with " /* Basic MQTT example with Authentication - connects to an MQTT server, providing username and password - publishes "hello world" to the topic "outTopic" -..."