MQTT发布主题

// newmqtt.cpp : Defines the entry point for the console application.
// 2018.08.14 发布主题ok
//

#include "stdafx.h"
#include "windows.h"
#include "aes.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"

#include <time.h>

#include "MQTTClient.h"
#define NUM_THREADS 2
#define ADDRESS     "tcp://localhost:61613" //更改此处地址
#define CLIENTID    "aaabbbccc_pub" //更改此处客户端ID
#define SUB_CLIENTID    "aaabbbccc_sub" //更改此处客户端ID
#define TOPIC       "/public/TEST/windows" //更改发送的话题
#define PAYLOAD     "Hello Man, Can you see me mzz ?!" //
#define QOS         1
#define TIMEOUT     10000L
#define USERNAME    "admin"
#define PASSWORD    "password"
#define DISCONNECT "out"

int CONNECT = 1;
volatile MQTTClient_deliveryToken deliveredtoken;

void delivered(void *context, MQTTClient_deliveryToken dt)
{
    printf("Message with token value %d delivery confirmed\n", dt);
    deliveredtoken = dt;
}
int msgarrvd(void *context, char *topicName, int topicLen, MQTTClient_message *message)
{
    int i;
    char* payloadptr;

    printf("Message arrived\n");
    printf("     topic: %s\n", topicName);
    printf("   message: ");

    payloadptr =(char *) message->payload;//"dddd";
    if(strcmp(payloadptr, DISCONNECT) == 0){
        printf(" \n out!!");
        CONNECT = 0;
    }

    for(i=0; i<message->payloadlen; i++)
    {
        putchar(*payloadptr++);
    }
    printf("\n");

    MQTTClient_freeMessage(&message);
    MQTTClient_free(topicName);
    return 1;
}
void connlost(void *context, char *cause)
{
    printf("\nConnection lost\n");
    printf("     cause: %s\n", cause);
}
int mqtt ()
{
    MQTTClient client;
    MQTTClient_connectOptions conn_opts = MQTTClient_connectOptions_initializer;
    MQTTClient_message pubmsg = MQTTClient_message_initializer;
    MQTTClient_deliveryToken token;
    int rc;
MQTTClient_create(&client, ADDRESS, SUB_CLIENTID,
        MQTTCLIENT_PERSISTENCE_NONE, NULL);
    conn_opts.keepAliveInterval = 20;
    conn_opts.cleansession = 1;
    conn_opts.username = USERNAME;
    conn_opts.password = PASSWORD;

    MQTTClient_setCallbacks(client, NULL, connlost, msgarrvd, delivered);
    if ((rc = MQTTClient_connect(client, &conn_opts)) != MQTTCLIENT_SUCCESS)
    {
        printf("Failed to connect, return code %d\n", rc);
        exit(EXIT_FAILURE);
    }
   char tmp[64];
   time_t timep;
    time (&timep);
    strftime(tmp, sizeof(tmp), "%Y-%m-%d %H:%M:%S",localtime(&timep) );
    pubmsg.payload =tmp;// PAYLOAD;
    pubmsg.payloadlen =strlen(tmp);// strlen(PAYLOAD);
    pubmsg.qos = QOS;
    pubmsg.retained = 0;
   int pubrst= MQTTClient_publishMessage(client, TOPIC, &pubmsg, &token);
    printf("dd--dd %d\n",pubrst);
   Sleep(10000);//相邻两次发布之间间隔时间10秒
    printf("Waiting for up to %d seconds for publication of %s\n"
            "on topic %s for client with ClientID: %s\n",
            (int)(TIMEOUT/1000), PAYLOAD, TOPIC, CLIENTID);
    rc = MQTTClient_waitForCompletion(client, token, TIMEOUT);
    printf("Message with delivery token %d delivered\n", token);
    MQTTClient_disconnect(client, 10000);
    MQTTClient_destroy(&client);
    return rc;
}
int main()
{
   int flag=0;
    unsigned char ss[20];
   char * sst ="sssss";// ={0x02};
   memcpy(ss,sst,4);
   printf("%s",ss);


   while(1)
   {
     flag++;
   if (flag%10==0)
   {
      mqtt();
      printf("1111111");
   }
   if (flag>=100)
     flag=0;


   }
}

注意：libeay32.lib ssleay32.lib paho-mqtt3a.lib paho-mqtt3c.lib 需要库

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