MQTT-C-PUB

/*
 ============================================================================
 Name        : mqtest.c
 Author      :
 Version     :
 Copyright   : Your copyright notice
 Description : Hello World in C, Ansi-style
 ============================================================================
 */

#include <stdio.h>
#include <stdlib.h>
#include <mosquitto.h>
#include <string.h>
void my_message_callback(struct mosquitto *mosq, void *userdata, const struct mosquitto_message *message)
{
    if(message->payloadlen){
        printf("%s %s\n", message->topic, message->payload);
    }else{
        printf("%s (null)\n", message->topic);

    }

    fflush(stdout);
}

void my_connect_callback(struct mosquitto *mosq, void *userdata, int result)
{
    int i;
    if(!result){

        mosquitto_subscribe(mosq, NULL, "lgt", 2);
        /*mosquitto_publish(mosq,NULL,"lgt")*/
        /*int payloadlen, const void *payload, int qos, bool retain*/
    }else{
        fprintf(stderr, "Connect failed\n");
    }
}

void my_subscribe_callback(struct mosquitto *mosq, void *userdata, int mid, int qos_count, const int *granted_qos)
{
    int i;

    printf("Subscribed (mid: %d): %d", mid, granted_qos[0]);
    for(i=1; i<qos_count; i++){
        printf(", %d", granted_qos[i]);
    }

    printf("\n");
}

void my_log_callback(struct mosquitto *mosq, void *userdata, int level, const char *str)
{
    /* Pring all log messages regardless of level.*/
    printf("%s\n", str);
}

int main(void) {
    puts("!!!Hello World!!!");
/*    prints !!!Hello World!!! */

    int i=0;
        char *host = "localhost";
        char dst[]="lgttest12321321";
        char dst1[20];
        char ddd[200];
        int port = 1883;
        int keepalive = 60;
        bool clean_session = true;
        struct mosquitto *mosq = NULL;
        mosquitto_lib_init();
        mosq = mosquitto_new("track01", clean_session, NULL);
            if(!mosq){
            fprintf(stderr, "Error: Out of memory.\n");
            return 1;
        }
            mosquitto_log_callback_set(mosq, my_log_callback);
        /*mosquitto_connect_callback_set(mosq, my_connect_callback);*/
        mosquitto_message_callback_set(mosq, my_message_callback);
        mosquitto_subscribe_callback_set(mosq, my_subscribe_callback);

        if(mosquitto_connect(mosq, host, port, keepalive)){
            fprintf(", %d", i);
            return 1;

        }


        for(;;)
                {

            i++;
            /*itoa(i,dst1,10);*/
            sprintf(dst1, "%d", i);
            /**ddd=strcat(dst, dst1);*/
            //dst1=dst;
            mosquitto_publish(mosq, NULL, "lgt",strlen(dst1), dst1, 0, true);
            /*fprintf(", %d", i);*/
                }

        mosquitto_loop_forever(mosq, -1, 1);

        mosquitto_destroy(mosq);
        mosquitto_lib_cleanup();

        return 0;
    /*return EXIT_SUCCESS;*/
}