I cant connect via mqtt (im wondering that the version of mqtt its not the same on node red and rpb pi3 how can i make it the same versin)

[bilel]

[knolleary]

Please keep to one thread when discussing the same problem.

Closing this thread because you have already this Connection failed to broker () thread active.

The mosquitto broker you are running supports MQTT 3.1.1 - so that is not the issue here.