30 Sep '14, 2pm

MQTT - the language of the Internet of Things ? #IoT

// Launchpad MQTTT client // #include "Ethernet.h" #include "PubSubClient.h" unsigned char led1Status = HIGH; unsigned char led2Status = HIGH; unsigned char led3Status = HIGH; unsigned char led4Status = HIGH; // Enter a MAC address for your controller below. // Newer Ethernet shields have a MAC address printed on a sticker on the shield byte mac[] = { 0x00, 0x1A, 0xB6, 0x02, 0xAE, 0xA0 }; // MQTT broker client byte mqttServer[] = { 192, 168, 1, 79 }; EthernetClient client; PubSubClient mqttNode( mqttServer, 1883, mqttCallback, client ); // topic to subscribe from broker char *subTopic = "localnet/openHAB/devices/#"; void mqttCallback( char *topic, byte *payload, unsigned int length ) { Serial.print( topic ); Serial.print( " : " ); Serial.print( (char*) payload ); Serial.print( " : " ); Serial.println( length, DEC ); int position = 0; int ledId = 0; while( topic[position] !...

Full article: http://www.element14.com/community/community/design-chall...

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MQTT - The language of IoT #IoT

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// Launchpad MQTTT client // #include "Ethernet.h" #include "PubSubClient.h" unsigned char led1Status = HIGH; unsigned cha...

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