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<div class="textblock"><div class="fragment"><div class="line"><span class="preprocessor">#include &lt;stdio.h&gt;</span></div><div class="line"><span class="preprocessor">#include &lt;stdlib.h&gt;</span></div><div class="line"><span class="preprocessor">#include &lt;string.h&gt;</span></div><div class="line"><span class="preprocessor">#include &quot;<a class="code" href="_m_q_t_t_async_8h.html">MQTTAsync.h</a>&quot;</span></div><div class="line"></div><div class="line"><span class="preprocessor">#define ADDRESS &quot;tcp://localhost:1883&quot;</span></div><div class="line"><span class="preprocessor">#define CLIENTID &quot;ExampleClientPub&quot;</span></div><div class="line"><span class="preprocessor">#define TOPIC &quot;MQTT Examples&quot;</span></div><div class="line"><span class="preprocessor">#define PAYLOAD &quot;Hello World!&quot;</span></div><div class="line"><span class="preprocessor">#define QOS 1</span></div><div class="line"><span class="preprocessor">#define TIMEOUT 10000L</span></div><div class="line"></div><div class="line"><span class="keyword">volatile</span> <a class="code" href="_m_q_t_t_async_8h.html#a7ca6d2a1813f2bbd0bc3af2771e46ba4">MQTTAsync_token</a> deliveredtoken;</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> finished = 0;</div><div class="line"></div><div class="line"><span class="keywordtype">void</span> connlost(<span class="keywordtype">void</span> *context, <span class="keywordtype">char</span> *cause)</div><div class="line">{</div><div class="line"> <a class="code" href="_m_q_t_t_async_8h.html#a0db1d736cdc0c864fe41abb3afd605bd">MQTTAsync</a> client = (<a class="code" href="_m_q_t_t_async_8h.html#a0db1d736cdc0c864fe41abb3afd605bd">MQTTAsync</a>)context;</div><div class="line"> <a class="code" href="struct_m_q_t_t_async__connect_options.html">MQTTAsync_connectOptions</a> conn_opts = <a class="code" href="_m_q_t_t_async_8h.html#ae18b51f22784a43803eb809d6a0c2492">MQTTAsync_connectOptions_initializer</a>;</div><div class="line"> <span class="keywordtype">int</span> rc;</div><div class="line"></div><div class="line"> printf(<span class="stringliteral">&quot;\nConnection lost\n&quot;</span>);</div><div class="line"> printf(<span class="stringliteral">&quot; cause: %s\n&quot;</span>, cause);</div><div class="line"></div><div class="line"> printf(<span class="stringliteral">&quot;Reconnecting\n&quot;</span>);</div><div class="line"> conn_opts.<a class="code" href="struct_m_q_t_t_async__connect_options.html#ac8dd0930672a9c7d71fc645aa1f0521d">keepAliveInterval</a> = 20;</div><div class="line"> conn_opts.<a class="code" href="struct_m_q_t_t_async__connect_options.html#a036c36a2a4d3a3ffae9ab4dd8b3e7f7b">cleansession</a> = 1;</div><div class="line"> <span class="keywordflow">if</span> ((rc = <a class="code" href="_m_q_t_t_async_8h.html#a0388b226a414b09fa733f6d65004ec32">MQTTAsync_connect</a>(client, &amp;conn_opts)) != <a class="code" href="_m_q_t_t_async_8h.html#afe0cffcce8efe25186f79c51ac44e16f">MQTTASYNC_SUCCESS</a>)</div><div class="line"> {</div><div class="line"> printf(<span class="stringliteral">&quot;Failed to start connect, return code %d\n&quot;</span>, rc);</div><div class="line"> finished = 1;</div><div class="line"> }</div><div class="line">}</div><div class="line"></div><div class="line"></div><div class="line"><span class="keywordtype">void</span> onDisconnect(<span class="keywordtype">void</span>* context, <a class="code" href="struct_m_q_t_t_async__success_data.html">MQTTAsync_successData</a>* response)</div><div class="line">{</div><div class="line"> printf(<span class="stringliteral">&quot;Successful disconnection\n&quot;</span>);</div><div class="line"> finished = 1;</div><div class="line">}</div><div class="line"></div><div class="line"></div><div class="line"><span class="keywordtype">void</span> onSend(<span class="keywordtype">void</span>* context, <a class="code" href="struct_m_q_t_t_async__success_data.html">MQTTAsync_successData</a>* response)</div><div class="line">{</div><div class="line"> <a class="code" href="_m_q_t_t_async_8h.html#a0db1d736cdc0c864fe41abb3afd605bd">MQTTAsync</a> client = (<a class="code" href="_m_q_t_t_async_8h.html#a0db1d736cdc0c864fe41abb3afd605bd">MQTTAsync</a>)context;</div><div class="line"> <a class="code" href="struct_m_q_t_t_async__disconnect_options.html">MQTTAsync_disconnectOptions</a> opts = <a class="code" href="_m_q_t_t_async_8h.html#a2fd5d6df31928ae468f3f2e522b9c707">MQTTAsync_disconnectOptions_initializer</a>;</div><div class="line"> <span class="keywordtype">int</span> rc;</div><div class="line"></div><div class="line"> printf(<span class="stringliteral">&quot;Message with token value %d delivery confirmed\n&quot;</span>, response-&gt;<a class="code" href="struct_m_q_t_t_async__success_data.html#af8f771e67d284379111151b003c0d810">token</a>);</div><div class="line"></div><div class="line"> opts.<a class="code" href="struct_m_q_t_t_async__disconnect_options.html#ac13fb68f736854fcab131b34756bfceb">onSuccess</a> = onDisconnect;</div><div class="line"> opts.<a class="code" href="struct_m_q_t_t_async__disconnect_options.html#ae376f130b17d169ee51be68077a89ed0">context</a> = client;</div><div class="line"></div><div class="line"> <span class="keywordflow">if</span> ((rc = <a class="code" href="_m_q_t_t_async_8h.html#adc69afa4725f8321bdaa5a05aec5cfd5">MQTTAsync_disconnect</a>(client, &amp;opts)) != <a class="code" href="_m_q_t_t_async_8h.html#afe0cffcce8efe25186f79c51ac44e16f">MQTTASYNC_SUCCESS</a>)</div><div class="line"> {</div><div class="line"> printf(<span class="stringliteral">&quot;Failed to start sendMessage, return code %d\n&quot;</span>, rc);</div><div class="line"> exit(EXIT_FAILURE);</div><div class="line"> }</div><div class="line">}</div><div class="line"></div><div class="line"></div><div class="line"><span class="keywordtype">void</span> onConnectFailure(<span class="keywordtype">void</span>* context, <a class="code" href="struct_m_q_t_t_async__failure_data.html">MQTTAsync_failureData</a>* response)</div><div class="line">{</div><div class="line"> printf(<span class="stringliteral">&quot;Connect failed, rc %d\n&quot;</span>, response ? response-&gt;<a class="code" href="struct_m_q_t_t_async__failure_data.html#a45a5b7c00a796a23f01673cef1dbe0a9">code</a> : 0);</div><div class="line"> finished = 1;</div><div class="line">}</div><div class="line"></div><div class="line"></div><div class="line"><span class="keywordtype">void</span> onConnect(<span class="keywordtype">void</span>* context, <a class="code" href="struct_m_q_t_t_async__success_data.html">MQTTAsync_successData</a>* response)</div><div class="line">{</div><div class="line"> <a class="code" href="_m_q_t_t_async_8h.html#a0db1d736cdc0c864fe41abb3afd605bd">MQTTAsync</a> client = (<a class="code" href="_m_q_t_t_async_8h.html#a0db1d736cdc0c864fe41abb3afd605bd">MQTTAsync</a>)context;</div><div class="line"> <a class="code" href="struct_m_q_t_t_async__response_options.html">MQTTAsync_responseOptions</a> opts = <a class="code" href="_m_q_t_t_async_8h.html#a3f8b408243b5c2369bc9758f2edf0878">MQTTAsync_responseOptions_initializer</a>;</div><div class="line"> <a class="code" href="struct_m_q_t_t_async__message.html">MQTTAsync_message</a> pubmsg = <a class="code" href="_m_q_t_t_async_8h.html#a6a85061dadab532f28e96e5ab3c600e9">MQTTAsync_message_initializer</a>;</div><div class="line"> <span class="keywordtype">int</span> rc;</div><div class="line"></div><div class="line"> printf(<span class="stringliteral">&quot;Successful connection\n&quot;</span>);</div><div class="line"></div><div class="line"> opts.<a class="code" href="struct_m_q_t_t_async__response_options.html#ac13fb68f736854fcab131b34756bfceb">onSuccess</a> = onSend;</div><div class="line"> opts.<a class="code" href="struct_m_q_t_t_async__response_options.html#ae376f130b17d169ee51be68077a89ed0">context</a> = client;</div><div class="line"></div><div class="line"> pubmsg.<a class="code" href="struct_m_q_t_t_async__message.html#a9eff55064941fb604452abb0050ea99d">payload</a> = PAYLOAD;</div><div class="line"> pubmsg.<a class="code" href="struct_m_q_t_t_async__message.html#aa3cb44feb3ae6d11b3a4cad2d94cb33a">payloadlen</a> = strlen(PAYLOAD);</div><div class="line"> pubmsg.<a class="code" href="struct_m_q_t_t_async__message.html#a35738099155a0e4f54050da474bab2e7">qos</a> = QOS;</div><div class="line"> pubmsg.<a class="code" href="struct_m_q_t_t_async__message.html#a6a4904c112507a43e7dc8495b62cc0fc">retained</a> = 0;</div><div class="line"> deliveredtoken = 0;</div><div class="line"></div><div class="line"> <span class="keywordflow">if</span> ((rc = <a class="code" href="_m_q_t_t_async_8h.html#a5687171e67e98f9ea590c9e3b64cde18">MQTTAsync_sendMessage</a>(client, TOPIC, &amp;pubmsg, &amp;opts)) != <a class="code" href="_m_q_t_t_async_8h.html#afe0cffcce8efe25186f79c51ac44e16f">MQTTASYNC_SUCCESS</a>)</div><div class="line"> {</div><div class="line"> printf(<span class="stringliteral">&quot;Failed to start sendMessage, return code %d\n&quot;</span>, rc);</div><div class="line"> exit(EXIT_FAILURE);</div><div class="line"> }</div><div class="line">}</div><div class="line"></div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span>* argv[])</div><div class="line">{</div><div class="line"> <a class="code" href="_m_q_t_t_async_8h.html#a0db1d736cdc0c864fe41abb3afd605bd">MQTTAsync</a> client;</div><div class="line"> <a class="code" href="struct_m_q_t_t_async__connect_options.html">MQTTAsync_connectOptions</a> conn_opts = <a class="code" href="_m_q_t_t_async_8h.html#ae18b51f22784a43803eb809d6a0c2492">MQTTAsync_connectOptions_initializer</a>;</div><div class="line"> <a class="code" href="struct_m_q_t_t_async__message.html">MQTTAsync_message</a> pubmsg = <a class="code" href="_m_q_t_t_async_8h.html#a6a85061dadab532f28e96e5ab3c600e9">MQTTAsync_message_initializer</a>;</div><div class="line"> <a class="code" href="_m_q_t_t_async_8h.html#a7ca6d2a1813f2bbd0bc3af2771e46ba4">MQTTAsync_token</a> token;</div><div class="line"> <span class="keywordtype">int</span> rc;</div><div class="line"></div><div class="line"> <a class="code" href="_m_q_t_t_async_8h.html#a5462c4618d0a229116db5fbadacf95d2">MQTTAsync_create</a>(&amp;client, ADDRESS, CLIENTID, <a class="code" href="_m_q_t_t_client_persistence_8h.html#ae01e089313a65ac4661ed216b6ac00fa">MQTTCLIENT_PERSISTENCE_NONE</a>, NULL);</div><div class="line"></div><div class="line"> <a class="code" href="_m_q_t_t_async_8h.html#ae9ae8d61023e7029ef5a19f5219c3599">MQTTAsync_setCallbacks</a>(client, NULL, connlost, NULL, NULL);</div><div class="line"></div><div class="line"> conn_opts.<a class="code" href="struct_m_q_t_t_async__connect_options.html#ac8dd0930672a9c7d71fc645aa1f0521d">keepAliveInterval</a> = 20;</div><div class="line"> conn_opts.<a class="code" href="struct_m_q_t_t_async__connect_options.html#a036c36a2a4d3a3ffae9ab4dd8b3e7f7b">cleansession</a> = 1;</div><div class="line"> conn_opts.<a class="code" href="struct_m_q_t_t_async__connect_options.html#ac13fb68f736854fcab131b34756bfceb">onSuccess</a> = onConnect;</div><div class="line"> conn_opts.<a class="code" href="struct_m_q_t_t_async__connect_options.html#a09ce26d7cff24e14a6844eaae7b15290">onFailure</a> = onConnectFailure;</div><div class="line"> conn_opts.<a class="code" href="struct_m_q_t_t_async__connect_options.html#ae376f130b17d169ee51be68077a89ed0">context</a> = client;</div><div class="line"> <span class="keywordflow">if</span> ((rc = <a class="code" href="_m_q_t_t_async_8h.html#a0388b226a414b09fa733f6d65004ec32">MQTTAsync_connect</a>(client, &amp;conn_opts)) != <a class="code" href="_m_q_t_t_async_8h.html#afe0cffcce8efe25186f79c51ac44e16f">MQTTASYNC_SUCCESS</a>)</div><div class="line"> {</div><div class="line"> printf(<span class="stringliteral">&quot;Failed to start connect, return code %d\n&quot;</span>, rc);</div><div class="line"> exit(EXIT_FAILURE);</div><div class="line"> }</div><div class="line"></div><div class="line"> printf(<span class="stringliteral">&quot;Waiting for publication of %s\n&quot;</span></div><div class="line"> <span class="stringliteral">&quot;on topic %s for client with ClientID: %s\n&quot;</span>,</div><div class="line"> PAYLOAD, TOPIC, CLIENTID);</div><div class="line"> <span class="keywordflow">while</span> (!finished)</div><div class="line"><span class="preprocessor"> #if defined(WIN32) || defined(WIN64)</span></div><div class="line"> Sleep(100);</div><div class="line"><span class="preprocessor"> #else</span></div><div class="line"> usleep(10000L);</div><div class="line"><span class="preprocessor"> #endif</span></div><div class="line"></div><div class="line"> <a class="code" href="_m_q_t_t_async_8h.html#ad5562f9dc71fbd93d25ad20b328cb887">MQTTAsync_destroy</a>(&amp;client);</div><div class="line"> <span class="keywordflow">return</span> rc;</div><div class="line">}</div></div><!-- fragment --> </div></div><!-- contents -->
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