尊龙凯时人生就是博

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sudo apt-get update
sudo apt-get install make gcc git

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±ßÑØÍø¹ØºÍÎïÁªÍøÍø¹ØÐèÒªÓë×°±¸ºÍÔƶËϵͳ¾ÙÐÐͨѶ¡£ÎªÁËʵÏÖÕâһĿµÄ£¬ÎÒÃÇÐèÒªÉèÖÃÍøÂçÅþÁ¬¡£ÒÔÌ«ÍøÊÇ×î³£¼ûµÄÅþÁ¬·½·¨£¬ÎÒÃÇ¿ÉÒÔͨ¹ýÒÔÏ°취ÉèÖÃÍøÂçÅþÁ¬£º

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sudo vim /etc/network/interfaces

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auto eth0
iface eth0 inet static
    address [Íø¹ØIPµØµã]
    netmask [×ÓÍøÑÚÂë]
    gateway [Íø¹ØIPµØµã]
   dns-nameservers [DNSЧÀÍÆ÷IPµØµã]

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sudo systemctl restart networking

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wget https://github.com/eclipse/kura/releases/download/v4.3.0/kura_4.3.0_raspberry-pi-2-3.img.gz

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gunzip kura_4.3.0_raspberry-pi-2-3.img.gz

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sudo dd bs=4M if=kura_4.3.0_raspberry-pi-2-3.img of=/dev/sdX conv=fsync

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Ò»µ©×°ÖÃÉèÖÃÍê³É£¬ÎÒÃÇ¿ÉÒÔ×îÏÈ¿ª·¢±ßÑØÍø¹ØºÍÎïÁªÍøÍø¹ØµÄÓ¦ÓóÌÐò¡£ÒÔ»ùÓÚCÓïÑÔµÄMQTT¿Í»§¶ËΪÀý£¬ÎÒÃǽ«ÑÝʾÔõÑùʹÓÃPaho MQTT¿â¾ÙÐпª·¢£º

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git clone https://github.com/eclipse/paho.mqtt.c.git

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cd paho.mqtt.c
make
sudo make install

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <MQTTClient.h>

#define ADDRESS "tcp://[MQTTЧÀÍÆ÷IPµØµã]:[MQTTЧÀÍÆ÷¶Ë¿ÚºÅ]"
#define CLIENTID "ExampleClientPub"
#define TOPIC "test"
#define PAYLOAD "Hello, MQTT!"

int main(int argc, char* argv[])
{
    MQTTClient client;
    MQTTClient_connectOptions conn_opts = MQTTClient_connectOptions_initializer;
    int rc;

    MQTTClient_create(&client, ADDRESS, CLIENTID, MQTTCLIENT_PERSISTENCE_DEFAULT, NULL);
    conn_opts.keepAliveInterval = 20;
    conn_opts.cleansession = 1;

    MQTTClient_connect(client, &conn_opts);

    MQTTClient_message pubmsg = MQTTClient_message_initializer;
    MQTTClient_deliveryToken token;
    pubmsg.payload = PAYLOAD;
    pubmsg.payloadlen = strlen(PAYLOAD);
    pubmsg.qos = 0;
    pubmsg.retained = 0;
    MQTTClient_publishMessage(client, TOPIC, &pubmsg, &token);

    sleep(1);

    MQTTClient_disconnect(client, 10000);
    MQTTClient_destroy(&client);

    return rc;
}

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gcc -o mqtt_client mqtt_client.c -lpaho-mqtt3c
./mqtt_client

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