v6.0.0

• Supressed warnings. (#367, #368, #369, #370, #371)
• Set [[deprecated]] attribute to derecated APIs. They will be removed on verion 7.0.0. (#364, #372)
• Added mqtt::buffer based APIs. (#364)
• Added user defined namespace support. User can define MQTT_NS (default mqtt). (#360)
• Improved test. (#357)
• Improved test broker. (#353)
• Added allocation fuction for mqtt::buffer. (#349)
• Supported old version of boost type_erasure. (#347)
• <<<< breaking change >>>> Adde zero copy receiving functionality. Callback handlers take mqtt::buffer parameter instead of mqtt::string_view. It can hold the lifetime. (#339, #358, #359, )
• Improved CI. (#333, #346)

v5.0.1

• Improved CI. (#330)
• Fixed invalid std::any inclusion on mqtt::any. (#328)

v5.0.0

5.0.0

• Fixed invalid pointer comparison. (#324)
• Fixed user_property value length. (#323)
• Added store type alias for each properties. (#319)
• Fixed BOOST_MPL_LIMIT_LIST_SIZE comparison. (#318)
• Removed BOOST_ASSERT from test code to improve exception message. (#315)
• Code refactoring. (#313)
• Added default parameter to async_send_pubrel's life_keeper. (#312)
• Added async version of stored message sending after CONNACK received. (#311)
• <<<< breaking change >>>> Removed unnecessery callback invokation. (#309)
• Fixed moved from object access. (#308)
• <<<< breaking change >>>> Added properties and life_keeper parameter to pubrel and async_publrel. (#307)
• Added reuse_address flag to the test broker to avoid "address already in use" on travis-ci. (#306)
• <<<< breaking change >>>> Fixed TCP accepting process. After TCP accepting, do the next accepting process immediately. Due to the fix, Socket is updated to shared_ptr from unique_ptr. (#299)
• <<<< breaking change >>>> Added underlying connect timeout. It can treat well with TCP connected but TLS handshake not sending attack. (#296)
• Added stream output operator for properties. (#293)
• Replaced byte sequence creation macro with function. (#291)
• Fixed static boost support. (#290)
• <<<< breaking change >>>> Fixed property allocation management. (#288)
• Improved MSVC support for test. (#286)
• Added codecov for CI. (#285, #276, #275, #273)
• Added MQTT_BUILD_EXAMPLES flag to cmake to shorten CI time. (#284)
• Added non_ref/ref types conversion for properties. (#283)
• Added tests. (#278, #276)
• Improve travis-ci. (#274)
• Migrate from appveyor azure devops build pipelines that supports 10 parallel build. (#270)
• Fixed pingreq async/sync send. (#267)

v4.0.0

• Added getting ssl keylog callback for debugging. (#256)
• Fixed re-listen logic for servers. Now we can re-listen after accept is failed. (#252, #254)
• Fixed restore lifetime management to avoid accessing memory after destroyed (#251)
• Removed BOOST_ASSERT checking in the case that actually happens if invalid message is received (#249, #250)
• Added MQTT v5 support (#226, #245, #257, #258, #259)
• Added connection overwrite behavior on test_broker (#210)
• Added async_client and sync_client to avoid misusing async and sync APIs. client is still remained that can use both sync and async APIs. (#208)
• Added concatenating const_buffer functionality on asynchronous packet sending (#207)
• Improved documents (#198, #214, #219, #229, #235)
• Added switching option between std and boost (#188, #209)
• Improved build mechanisim (#184, #201, #253)
• Code refactoring (#183, #189, #190, #193, #195, #197, #199, #202, #203, #211, #215, #216, #220, #227, #234, #236, #238, #239, #240, #242)
• Support configure time switches for using std::varient or std::optional instead of the boost versions (#182)
• Allow inheriting classes to construct mqtt::client (#181)
• <<<< Breaking change >> Replaced fixed_header type from char to std::uint8_t. Fixed -Wconversion warnings. See https://github.com/redboltz/mqtt_cpp/pull/180/files (#180)

v3.1.0

• Fixed inefficient passed by value. (#174)
• Fixed unsugscribe message packet id position for continuours buffer. (#167)
• Fixed subscribe message remaining length buffer size. (#165)
• Added broker example. (#164)
• Improved CI. (#161)
• Added 32bit packet id support. It is out of MQTT spec. (#160, #163, #166, #168)
• Added store assertion to detect internal logic error. (#157)
• Fixed life keeper storing timing. (#156, #159)
• Added getter for handlers. (#155)
• Fixed async write callback. (#154)
• Fixed ambiguous function call on C++17 visit call. (#153)
• Improved packet id allocating algorithm. (#152, #162)
• Removed throwing exception when error on close happens. (#151)
• Added re-listen support after listining socket closed. (#150)
• Fixed string_view definition (#146)
• Added string (UTF-8) checking. It is disabled by default. Define MQTT_USE_STR_CHECK to enable it. (#142, #143)
• Improved documents (#141, #131, #172, #173)
• Improved build mechanisim (#140, #147, #148, #170)
• Added custom next mqtt message read handler setting mechanism (#139)

v3.0.0

• << Breaking change >> mqtt_cpp requires full C++14 feature.
• Added boost::asio::const_buffer interface. User can use it as topic name and contents(payload).
  (#127, #134, #136)
• Improved CI environment. (#129, #130)
• Fixed packet_id leak. (#132)
• Fixed queuing message leak. (#133)
• Added disconnect timeout. (#135)
• Added connect status check function. (#131)

v2.1.0

• Added packet length checking handler for variable length MQTT packet. (#121)
• Fixed doxygen comments. (#119)
• Improved payload memory management. (#118)
• Fixed malformed connack (send by client) problem. (#117)
• Fixed missing packet length check on connect. (#116)
• Improved pingreq sending timing. (#115)

v2.0.0

• << Breaking change >> Updated close_handler and error_handler invoking rule.
  When the socket is closed,
  if user calls disconnect() and the socket closed by server cleanly, then close_handler is called,
  otherwise error_handler is called.(#113)
• Added publish and pubrel message serialize mechanism. (#111)
• Added boost beast support. (#106)
• Added boost 1.66.0 asio support. (#106)

v1.0.9

• Supported Boost 1.66.0 new asio interface. (#106)
• Updated beast to v124. (#107)
• If Boost version is 1.66.0 or later, use Boost.Beast. (#107)
• Improved tests. (#102, #104)
• Improved assetions. (#105)

v1.0.8

• Added TLS verifying setup functions. (#100)