Client does not fallback to MQTT3 on rabbitmq about gmqtt

[Lenka42]

Hi, thanks for notice!
Probably this happened because RabbitMQ broker didn't use proper connect acknowledgement code. Good one is
0x01 Connection Refused, unacceptable protocol version
Receiving this code, client will downgrade protocol version and try to reconnect.
I will add more related logging and clarification in README

[HerrMuellerluedenscheid]

Not sure if it helps. This is the logging output from gmqtt:

INFO:gmqtt.mqtt.protocol:[CONNECTION MADE]
INFO:gmqtt.mqtt.protocol:[CONN CLOSE NORMALLY]
INFO:mqtt.MQTTClient:disconnected

and this is the logging from rabbitmq:

2019-06-04 16:58:27.499 [error] <0.3814.0> MQTT cannot parse frame for connection '[[MYIPADDRESS]]:37366 -> [[SERVERIPADDRESS]]:1883', unparseable payload: <<16,33,0,4,77,81,84,84,5,194,0,60,0,0,5 [...]

Feel free to close the topic. Just wanted to draw your attention to that one.