FreeRTOS/coreMQTT Support (IDFGH-4261)

[AshUK]

Currently, the MQTT component makes use of the esp-mqtt library supported and maintained by espressif. Although this is a feature-rich library it does lack the many of qualities of CoreMQTT such as the extensive unit test code coverage and code quality.

Now that FreeRTOS/coreMQTT has reached released will there be planned support or an option to switch out the current component?

FreeRTOS/coreMQTT#98

[Alvin1Zhang]

Thanks for raising the feature request.

[lhespress]

@AshUK
Please replace esp-idf/components/mqtt and esp-idf/examples/protocols/mqtt/ssl to the attached files.

FreeRTOS:coreMQTT.zip

[AshUK]

@lhespress Thanks very much for this port, I really was not expecting a response so soon.

I have tested and it appears to be working as expected.

Free heap during a active MQTTS connection:
FreeRTOS=198068
ESP=192672

A saving of 5396 bytes seems promising.

[KaeLL]

@AshUK will you submit a PR?

[AshUK]

@KaeLL It wouldn't be my place to submit the PR as @lhespress has done all work.

@lhespress Do you know if there there is a plan to add this to the IDF ?

[lhespress]

@AshUK

I have submit a MR to the IDF for reviewing. I'll update the progress to you ASAP.

[lhespress]

@AshUK Hi, freertos coremqtt has been pushed on github, please check https://github.com/espressif/esp-freertos-coremqtt

[Alvin1Zhang]

Thanks for reporting, feel free to reopen.