Mqtt.loop blocking

[PM04290]

If no mqtt server available, or wifi/ethernet fail, mqtt.loop() freeze the main loop during many seconds. is it possible to modify process of mqtt.loop with non blocking ? something like true/false return. i must fork this library to solve problem and it's not a good solution for future.

are you knowing "async-mqtt-client" library ? is it possible to choose this one or PubSubClient ?

[xardas689]

The async-mqtt-client library is only working on esp devices. This library is designed to work with avr based processors as well and therfore using the PubSubClient internally with a wrapper build on top of it.

Besides that: I am not able to reproduce the error on an arduino mega board. But i noticed that the wrapper is calling the underlying loop function directly. It may help if you use the nonblocking reconnection.

[rikki78]

the nonblocking reconnection still will block the loop, as it waits 15s until it gets connected. If you want to avoid this you have to run the entire mqtt.loop(); in a different ESP task than the program loop

[dawidchyrzynski]

Duplicate of #77