wolfMQTT v1.7 (08/21/2020)

• Fix for publish with short topic name and example. (PR #169)
• Add MqttProps_ShutDown(). Fix MqttProp leaks(PR #167)
• Multithread fixes. (PR #166)
• Fix buffer overrun in strcpy(). Fix logic around getaddrinfo(). (PR #165)
• Fix MqttClient_WaitType for nonblock mode. (PR #164)
• Change anon union for ARMv6 error. (PR #163)
• Fix for publish large payload. (PR #162)
• Fixing LWT prop and allow null LWT. (PR #161)
• Fix for receive timeout in mqttsimple example. (PR #158)

wolfMQTT v1.6 (04/24/2020)

• Fixes to improve buffer size checking when using a small tx or rx buffer. (PR #137)
• Fix for MQTT v5 issue with using wrong property free. (PR #152)
• Refactor of the thread locking to use binary semaphore, which resolves issue with thread synchronization. (PR #146)
• Improved multi-thread example exit (ctrl+c). Use internal pipe to wake "select()" and use semaphore signal to "wake" ping thread. (PR #146)
• Adjust multi-threading use case to use separate thread for ping keep-alive. (PR #146)
• Added simple standalone MQTT client example. (PR #138)
• Added include for "user_settings.h" when WOLFMQTT_USER_SETTINGS is defined. (PR #138)
• Added broker compatibility list (PR #145)
• Added protocol version API's. (PR #152)
• Added multithread example for Windows and Visual Studio. (PR #146)
• Made protocol level a run time option (PR #147)
• Remove obsolete "sched_yield" call. (PR #146)
• Remove deprecated call to wolfSSL_set_using_nonblock() (PR #148)
• Sync automake fixes from wolfSSL to wolfMQTT. (PR #150)
• Moved MAX_PACKET_ID to library. (PR #138)

wolfMQTT v1.4 (12/27/19)

• Fixes for non-blocking and multi-threading edge cases. (PR #130)
  • Improved logic for processing objects from different threads.
  • Improved network connect/read to handle runtime option for block/non-block.
  • Improved examples to support adding random hex string to client_id and topic name when "-T" option is used.
  • Fix for test scripts to check non-zero return code.
  • Enabled the mqttclient, multithread and wiot examples when non-blocking is enabled.
  • Added encode debug log messages when WOLFMQTT_DEBUG_CLIENT is defined.
  • Added thread logging when WOLFMQTT_DEBUG_THREAD is defined with multi-threading support enabled.
• Fixes for Visual Studio project (PR #122)
  • Improvements to catch use of socket file descriptor before its been created/opened.
  • Improved handling for Windows socket want write.
  • Added library references to wolfSSL project.
  • Adjusted include to have IDE/WIN for user_settings.h.
• Fixes for Visual Studio conversion warning (PR #128)
• Fix visibility warnings in Cygwin (PR #127)
• Fix global declaration conflicts for CentOS (PR #133)
• Fix Microchip Harmony for mqtt_socket.c with non-blocking and errno.h (PR #135)
• Fix to not return from MqttClient_WaitMessage if response from another thread (PR #129)
• Refactor of the multi-threading code to better handle edge case and state for non-blocking (PR #126)
  • Fixes for multi-thread handling of ack's when processing.
  • Refactor to use stat from own struct, not shared msg->stat.
  • Eliminated use of client->msg except for MqttClient_WaitMessage.
  • Fixes to restore "state" after performing MqttClient operation.
  • Refactor of publish read and write payload.
  • Improvements to multithread example.
  • Refactor of the SN code to support new object type and unique state for future multi-thread support.
  • Added build option TEST_NONBLOCK to force testing non-blocking edge cases.
  • Fix for fwpush getting stuck in stop loop on Ctrl+c exit.
• Update Azure login and default broker (PR #131)

wolfMQTT v1.3 (08/01/19)

• Fix fwpush example to use filename option -f. (PR #117)
• Fix for MQTT_DATA_TYPE_BINARY data length encoded twice. (PR #112)
• Fix to clear local structures for subscribe and unsubscribe ACK's. (PR #112)
• Fix for SN_Encode_Unsubscribe using wrong data type for topic name ID. (PR #110)* Fixes for using RTCS in mqttnet.c socket example code. (PR #108)
• Fix MQTT-SN decode publish parsing and QoS2 response. (PR #107)
• Fix for Harmony possible circular include issue. (PR #98)
• Added multiple thread support using --enable-mt or WOLFMQTT_MULTITHREAD. (PR #115)
• Changed MqttSocket_TlsSocket callbacks to be public. (PR #104)
• Improved the disconnect network error callback example. (PR #102)
• Add MQTT context information to socket callback examples. (PR #101)
• Initialize subscribe state to MQTT_MSG_BEGIN. (PR #99)
• Added WOLFSSL_USER_SETTINGS to VS project files. (PR #109)

wolfMQTT v1.2 (11/07/18)

• Added MQTT Sensor Network (SN) client support (--enable-sn or WOLFMQTT_SN). (PR #96)
• Added MQTT v5.0 support with (--enable-mqtt5 or WOLFMQTT_V5). (PR #87)
• Added property callback support (MQTT v5.0 only). Enabled with --enable-propcb or WOLFMQTT_PROPERTY_CB). (PR #87)
• Fix for Harmony NetConnect function incorrectly checking EWOULDBLOCK. Fixes issue #88. (PR #89)
• Fix to reset the TLS ctx and ssl pointers when they have been free'd. (PR #85)
• Add way to pass custom context to the wolfMQTT TLS verify callback example mqtt_tls_verify_cb. PR #94)
• Create nonblocking mqttclient example ./examples/nbclient/nbclient. (PR #93)
• Add support for publishing in smaller chunks using new API MqttClient_Publish_ex. (PR #92)
• Added simplified Microchip Harmony wolfMQTT network callback example. (PR #83)

wolfMQTT v1.1 (06/21/18)

• Fixed case when use_tls was requested but TLS feature not compiled in. (PR #57)
• Fixed non-blocking issue that caused out of buffer error if not all of packet were received. (PR #65)
• Fixed non-blocking mode issue that was sending multiple connect requests for examples. (PR #65)
• Fixed non-blocking issue with ping keep alive in examples. (PR #68)
• Fixed the Arduino example with ENABLE_MQTT_TLS defined (PR #78)
• Added support for FreeRTOS TCP in wolfMQTT. (PR #58)
• Added README.md section for building wolfMQTT. (PR #63)
• Added new option to enable verbose logging ./configure --enable-debug=verbose. (PR #65)
• Added support for disconnect callback using WOLFMQTT_DISCONNECT_CB or ./configure --enable-discb. (PR #69)
• Added WOLFMQTT_LOCAL to internal API's for hidden visibility. (PR #73)
• Added include for wolfmqtt/options.h. (PR #79)
• Added IBM Watson IoT example (see ./examples/wiot/wiot). (PR #80)
• Updated the autoconf M4 files and added generation of ./configure options to wolfmqtt/options.h. (PR #71)
• Improved the message callback to support a custom context per message. (PR #62)
• Improved the non-blocking unsubscribe handling in mqttclient example for timeout. (PR #65)

wolfMQTT v1.0 (04/03/18)

• Fixed MqttClient_WaitMessage to use provided timeout_ms arg. With TLS enabled it was using the MqttClient_Init cmd_timeout_ms arg. Thanks PeterL for that report.
• Fixed cast warnings when building with Visual Studio.
• Cleanup socket code to use existing SOCK_CLOSE for NetDisconnect.
• Cleanup to move the sockRc into the MqttTls struct, since it only applies when TLS is enabled.
• Added configure option to disable error strings for reduced code size (./configure disable-errorstrings or #define WOLFMQTT_NO_ERROR_STRINGS).
• Added support for ChibiOS.

wolfMQTT v0.14 (11/22/17)

• Fixed non-blocking connect to check for EINPROGRESS for all platforms (not just Harmony).
• Fixed buffer overflow position check on read/write.
• Fixed typo on internal packet function MqttDecode_ConnectAck.
• Fixed the socket close for Harmony to use closesocket.
• Fixed non-blocking connect where WOLFMQTT_NO_STDIO is defined.
• Fixed GCC 7's new fall-through check.
• Added check for EAGAIN in non-blocking mode (was only EWOULDBLOCK).
• Added non-blocking support for write operations when WOLFMQTT_NONBLOCK is defined.
• Added support for DH and setting the default minimum key bits.
• Added support for keep-alive ping when using non-blocking mode.
• Improvements to example TLS callback handling of return code failures.
• Improvements and fixes to Visual Studio projects.
• Enhancement to adjust wolfSSL options.h include based on WOLFSSL_USER_SETTINGS.

wolfMQTT v0.13 (05/10/17)

• Fixed issue with msg->stat in non-blocking.
• Fixed Arduino library build.
• Fixed examples with non-blocking (--enable-nonblock).
• Enhancement to pass network callback return codes through context when using TLS.
• Added option to disable the blocking timeouts for select() using --disable-timeout (or WOLFMQTT_NO_TIMEOUT).
• Added option to disable STDIN/fgets capture for examples using --disable-stdincap (or WOLFMQTT_NO_STDIN_CAP)
• Refactor to use new MQTT_CODE_STDIN_WAKE return code for examples using STDIN to send publish messages (normal blocking mode only).

wolfMQTT v0.12 (12/20/16)

• Fixes issue with read timeout in non-blocking mode with TLS enabled being teated as socket error.
• Fixed issue with “msg->stat” not getting reset on failure or timeout.
• Fix to not link libwolfssl with ./configure --disable-tls.
• Added AWS IoT Example and test script.