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<div id="projectbrief">MQTT 3.1.1 Client Library</div>
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<div class="headertitle"><div class="title">MQTT_SerializeAck </div></div>
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<div class="textblock"><div class="fragment"><div class="line"><a class="code hl_enumeration" href="group__mqtt__enum__types.html#gaba7ec045874a1c3432f99173367f735c">MQTTStatus_t</a> <a class="code hl_function" href="core__mqtt__serializer_8h.html#a11ea4ac5ea27e93121288e463ca34ee6">MQTT_SerializeAck</a>( <span class="keyword">const</span> <a class="code hl_struct" href="struct_m_q_t_t_fixed_buffer__t.html">MQTTFixedBuffer_t</a> * pFixedBuffer,</div>
<div class="line"> uint8_t packetType,</div>
<div class="line"> uint16_t packetId );</div>
<div class="ttc" id="acore__mqtt__serializer_8h_html_a11ea4ac5ea27e93121288e463ca34ee6"><div class="ttname"><a href="core__mqtt__serializer_8h.html#a11ea4ac5ea27e93121288e463ca34ee6">MQTT_SerializeAck</a></div><div class="ttdeci">MQTTStatus_t MQTT_SerializeAck(const MQTTFixedBuffer_t *pFixedBuffer, uint8_t packetType, uint16_t packetId)</div><div class="ttdoc">Serialize an MQTT PUBACK, PUBREC, PUBREL, or PUBCOMP into the given buffer.</div><div class="ttdef"><b>Definition:</b> core_mqtt_serializer.c:2266</div></div>
<div class="ttc" id="agroup__mqtt__enum__types_html_gaba7ec045874a1c3432f99173367f735c"><div class="ttname"><a href="group__mqtt__enum__types.html#gaba7ec045874a1c3432f99173367f735c">MQTTStatus_t</a></div><div class="ttdeci">MQTTStatus_t</div><div class="ttdoc">Return codes from MQTT functions.</div><div class="ttdef"><b>Definition:</b> core_mqtt_serializer.h:87</div></div>
<div class="ttc" id="astruct_m_q_t_t_fixed_buffer__t_html"><div class="ttname"><a href="struct_m_q_t_t_fixed_buffer__t.html">MQTTFixedBuffer_t</a></div><div class="ttdoc">Buffer passed to MQTT library.</div><div class="ttdef"><b>Definition:</b> core_mqtt_serializer.h:123</div></div>
</div><!-- fragment --><p>Serialize an MQTT PUBACK, PUBREC, PUBREL, or PUBCOMP into the given buffer. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">pFixedBuffer</td><td>Buffer for packet serialization. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">packetType</td><td>Byte of the corresponding packet fixed header per the MQTT spec. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">packetId</td><td>Packet ID of the publish.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="group__mqtt__enum__types.html#ggaba7ec045874a1c3432f99173367f735caa39030c93b0263b2699502a074f003b5">MQTTBadParameter</a>, <a class="el" href="group__mqtt__enum__types.html#ggaba7ec045874a1c3432f99173367f735cab1be4db832a0468f024243bca151a8df">MQTTNoMemory</a>, or <a class="el" href="group__mqtt__enum__types.html#ggaba7ec045874a1c3432f99173367f735ca484e062cb4f3fccc1858dd25cfeee056">MQTTSuccess</a>.</dd></dl>
<p><b>Example</b> </p><div class="fragment"><div class="line"><span class="comment">// Variables used in this example.</span></div>
<div class="line"><a class="code hl_enumeration" href="group__mqtt__enum__types.html#gaba7ec045874a1c3432f99173367f735c">MQTTStatus_t</a> status;</div>
<div class="line"><a class="code hl_struct" href="struct_m_q_t_t_fixed_buffer__t.html">MQTTFixedBuffer_t</a> fixedBuffer;</div>
<div class="line">uint8_t buffer[ BUFFER_SIZE ];</div>
<div class="line">uint16_t packetId;</div>
<div class="line">uint8_t packetType;</div>
<div class="line"> </div>
<div class="line">fixedBuffer.<a class="code hl_variable" href="struct_m_q_t_t_fixed_buffer__t.html#acea147448e044870fb36b7fa2347dbd6">pBuffer</a> = buffer;</div>
<div class="line">fixedBuffer.<a class="code hl_variable" href="struct_m_q_t_t_fixed_buffer__t.html#a0b0b6a93cc62751ebeb03095d5431636">size</a> = BUFFER_SIZE;</div>
<div class="line"><span class="comment">// The fixed buffer must be large enough to hold 4 bytes.</span></div>
<div class="line">assert( BUFFER_SIZE &gt;= <a class="code hl_define" href="group__mqtt__constants.html#ga26994fcfacb1cff892caa45ec31ca7c6">MQTT_PUBLISH_ACK_PACKET_SIZE</a> );</div>
<div class="line"> </div>
<div class="line"><span class="comment">// The packet ID must be the same as the original publish packet.</span></div>
<div class="line">packetId = publishPacketId;</div>
<div class="line"> </div>
<div class="line"><span class="comment">// The byte representing a packet of type ACK. This function accepts PUBACK, PUBREC, PUBREL, or PUBCOMP.</span></div>
<div class="line">packetType = <a class="code hl_define" href="group__mqtt__constants.html#ga5f279d63de47a973b41b95f74f47a4f6">MQTT_PACKET_TYPE_PUBACK</a>;</div>
<div class="line"> </div>
<div class="line"><span class="comment">// Serialize the publish acknowledgment into the fixed buffer.</span></div>
<div class="line">status = <a class="code hl_function" href="core__mqtt__serializer_8h.html#a11ea4ac5ea27e93121288e463ca34ee6">MQTT_SerializeAck</a>( &amp;fixedBuffer, packetType, packetId );</div>
<div class="line"> </div>
<div class="line"><span class="keywordflow">if</span>( status == <a class="code hl_enumvalue" href="group__mqtt__enum__types.html#ggaba7ec045874a1c3432f99173367f735ca484e062cb4f3fccc1858dd25cfeee056">MQTTSuccess</a> )</div>
<div class="line">{</div>
<div class="line"> <span class="comment">// The publish acknowledgment can now be sent to the broker.</span></div>
<div class="line">}</div>
<div class="ttc" id="agroup__mqtt__constants_html_ga26994fcfacb1cff892caa45ec31ca7c6"><div class="ttname"><a href="group__mqtt__constants.html#ga26994fcfacb1cff892caa45ec31ca7c6">MQTT_PUBLISH_ACK_PACKET_SIZE</a></div><div class="ttdeci">#define MQTT_PUBLISH_ACK_PACKET_SIZE</div><div class="ttdoc">The size of MQTT PUBACK, PUBREC, PUBREL, and PUBCOMP packets, per MQTT spec.</div><div class="ttdef"><b>Definition:</b> core_mqtt_serializer.h:73</div></div>
<div class="ttc" id="agroup__mqtt__constants_html_ga5f279d63de47a973b41b95f74f47a4f6"><div class="ttname"><a href="group__mqtt__constants.html#ga5f279d63de47a973b41b95f74f47a4f6">MQTT_PACKET_TYPE_PUBACK</a></div><div class="ttdeci">#define MQTT_PACKET_TYPE_PUBACK</div><div class="ttdoc">PUBACK (bidirectional).</div><div class="ttdef"><b>Definition:</b> core_mqtt_serializer.h:56</div></div>
<div class="ttc" id="agroup__mqtt__enum__types_html_ggaba7ec045874a1c3432f99173367f735ca484e062cb4f3fccc1858dd25cfeee056"><div class="ttname"><a href="group__mqtt__enum__types.html#ggaba7ec045874a1c3432f99173367f735ca484e062cb4f3fccc1858dd25cfeee056">MQTTSuccess</a></div><div class="ttdeci">@ MQTTSuccess</div><div class="ttdef"><b>Definition:</b> core_mqtt_serializer.h:88</div></div>
<div class="ttc" id="astruct_m_q_t_t_fixed_buffer__t_html_a0b0b6a93cc62751ebeb03095d5431636"><div class="ttname"><a href="struct_m_q_t_t_fixed_buffer__t.html#a0b0b6a93cc62751ebeb03095d5431636">MQTTFixedBuffer_t::size</a></div><div class="ttdeci">size_t size</div><div class="ttdoc">Size of buffer.</div><div class="ttdef"><b>Definition:</b> core_mqtt_serializer.h:125</div></div>
<div class="ttc" id="astruct_m_q_t_t_fixed_buffer__t_html_acea147448e044870fb36b7fa2347dbd6"><div class="ttname"><a href="struct_m_q_t_t_fixed_buffer__t.html#acea147448e044870fb36b7fa2347dbd6">MQTTFixedBuffer_t::pBuffer</a></div><div class="ttdeci">uint8_t * pBuffer</div><div class="ttdoc">Pointer to buffer.</div><div class="ttdef"><b>Definition:</b> core_mqtt_serializer.h:124</div></div>
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