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76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
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/*******************************************************************************
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* Copyright (c) 2012, 2025 IBM Corp., Ian Craggs
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*
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v2.0
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* and Eclipse Distribution License v1.0 which accompany this distribution.
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*
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* The Eclipse Public License is available at
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* https://www.eclipse.org/legal/epl-2.0/
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* and the Eclipse Distribution License is available at
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* http://www.eclipse.org/org/documents/edl-v10.php.
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*
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* Contributors:
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* Ian Craggs - initial contribution
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*******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "MQTTClient.h"
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#define ADDRESS "tcp://test.mosquitto.org:1883"
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#define CLIENTID "ExampleClientPub"
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#define TOPIC "MQTT Examples"
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#define PAYLOAD "Hello World!"
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#define QOS 1
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#define TIMEOUT 10000L
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int main(int argc, char* argv[])
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{
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MQTTClient client;
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MQTTClient_connectOptions conn_opts = MQTTClient_connectOptions_initializer;
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MQTTClient_message pubmsg = MQTTClient_message_initializer;
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MQTTClient_deliveryToken token;
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int rc;
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const char* uri = (argc > 1) ? argv[1] : ADDRESS;
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printf("Using server at %s\n", uri);
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if ((rc = MQTTClient_create(&client, uri, CLIENTID,
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MQTTCLIENT_PERSISTENCE_NONE, NULL)) != MQTTCLIENT_SUCCESS)
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{
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printf("Failed to create client, return code %d\n", rc);
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exit(EXIT_FAILURE);
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}
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conn_opts.keepAliveInterval = 20;
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conn_opts.cleansession = 1;
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if ((rc = MQTTClient_connect(client, &conn_opts)) != MQTTCLIENT_SUCCESS)
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{
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printf("Failed to connect, return code %d\n", rc);
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exit(EXIT_FAILURE);
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}
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pubmsg.payload = PAYLOAD;
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pubmsg.payloadlen = (int)strlen(PAYLOAD);
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pubmsg.qos = QOS;
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pubmsg.retained = 0;
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if ((rc = MQTTClient_publishMessage(client, TOPIC, &pubmsg, &token)) != MQTTCLIENT_SUCCESS)
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{
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printf("Failed to publish message, return code %d\n", rc);
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exit(EXIT_FAILURE);
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}
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printf("Waiting for up to %d seconds for publication of %s\n"
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"on topic %s for client with ClientID: %s\n",
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(int)(TIMEOUT/1000), PAYLOAD, TOPIC, CLIENTID);
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rc = MQTTClient_waitForCompletion(client, token, TIMEOUT);
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printf("Message with delivery token %d delivered\n", token);
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if ((rc = MQTTClient_disconnect(client, 10000)) != MQTTCLIENT_SUCCESS)
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printf("Failed to disconnect, return code %d\n", rc);
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MQTTClient_destroy(&client);
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return rc;
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}
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