#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "MQTTClient.h"
#define ADDRESS
"tcp://broker.hivemq.com:1883"
#define TOPIC
"nopnop2002"
#define
QOS 1
#define TIMEOUT 10000L
int main(int argc, char* argv[])
{
MQTTClient client;
MQTTClient_connectOptions conn_opts =
MQTTClient_connectOptions_initializer;
MQTTClient_message pubmsg =
MQTTClient_message_initializer;
MQTTClient_deliveryToken token;
int rc;
char clientId[40];
char payload[40];
int i;
pid_t c_pid = getpid();
sprintf(clientId, "CLIENT-%d", c_pid);
printf("clientId=%s\n", clientId);
MQTTClient_create(&client, ADDRESS,
clientId, MQTTCLIENT_PERSISTENCE_NONE, NULL);
conn_opts.keepAliveInterval = 20;
conn_opts.cleansession = 1;
if ((rc = MQTTClient_connect(client,
&conn_opts)) != MQTTCLIENT_SUCCESS)
{
printf("Failed
to connect, return code %d\n", rc);
exit(-1);
}
strcpy(payload,"1010");;
for(i=0;i<4;i++) {
pubmsg.payload =
&payload[i];
pubmsg.payloadlen = 1;
pubmsg.qos = QOS;
pubmsg.retained = 0;
MQTTClient_publishMessage(client, TOPIC, &pubmsg,
&token);
printf("Waiting for up to
%d seconds for publication\n"
"on topic %s for client with ClientID: %s\n",
(int)(TIMEOUT/1000), TOPIC, clientId);
rc =
MQTTClient_waitForCompletion(client, token, TIMEOUT);
printf("Message with
delivery token %d delivered\n", token);
sleep(2);
}
MQTTClient_disconnect(client, 10000);
MQTTClient_destroy(&client);
return rc;
}
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