Unable to compile MQTT examples

[JeroenVanHoye]

When trying to compile examples that make use of PJONMQTTTranslate.h the Arduino IDE throws an error that it can not find the ReconnectingMqttClient.h library.

What needs to be installed for this to work?

Many thanks in advance!

[fredilarsen]

You need this repo: https://github.com/fredilarsen/ReconnectingMqttClient Download it and unzip it to your Arduino/libraries folder.

[2114L3]

This doesnt seem to be working with the example > PJON > ESP8266 > Local > MQTTTranslate > EnvironmentalController. The ReconnectingMqttClient uses ethernetlink which isnt supported on ESP8266/ESP32 re the wiki

compiling it throws errors on ntohl, htonl, htons, etc eg: Arduino/libraries/PJON/src/strategies/EthernetTCP/EthernetLink.h:377:48: error: 'ntohl' was not declared in this scope content_length = ntohl(content_length);

is there something else missing? or is MQTTTranslate not possible on platforms unsupported by ET?

looks like ESPs are excluded from these define statements https://github.com/gioblu/PJON/blob/38e36bb1228c1690143cfbf693a0bcb809514d6c/src/interfaces/ARDUINO/PJON_ARDUINO_Interface.h#LL147C64-L147C64

[fredilarsen]

@2114L3 I can confirm that the ReconnectingMqttClient does work on ESP8266, I just used it in my latest project.

I did now test building the EnvironmentController example and it builds fine with Arduino IDE 1.8.13 for "LOLIN(WEMOS) D1 R2 & mini" which is the ESP8266 board I prefer using. I also tested compiling with Arduino 2.1, and that works as well.

What IDE/version are you using? And which board are you selecting when building?

[2114L3]

Thank you!

I was: Arduino IDE 1.8.19 (linux) ReconnectingMqttClient 1.2.0 ESP8266 Community 2.4.1 "WeMos D1 R2 & mini"

noting your board quote has LOLIN and mine did not - I've spotted i was on ESP3266 community 2.4.1, updating this to 3.1.2 has resolved the issue and compiling.

regarding the wiki listing ET unsupported for ESP*, as EthernetLink is from within ET had me worried and lead me wrong.

hope this helps the original question.

[fredilarsen]

Thanks for the feedback. @gioblu This issue can be closed.