MQTT subscribe

[Shedaim]

What are the steps to reproduce this issue?

Subscribing to an MQTT broker using:

1. mqtt_object.set_callback(func)
2. mqtt_object.subscribe(topic)

What happens?

Code waits in a while 1 untill op == 0x90.
I get a response from the server which matches op == 0x92 (9 = Subscribe ACK, 2= reserved).
The server accepts the subscription, but Pycom gets stuck in an infinite loop.
Same happens if no answer arrives to the subscription request.

What were you expecting to happen?

Subscription ACK arrives and the code keeps running.

What versions of software are you using?

sysname='GPy', nodename='GPy', release='1.18.1.r4', version='v1.8.6-849-dfa1176 on 2018-11-12', machine='GPy with ESP32

[fusspawn]

@iwahdan88 Is this one for you? not sure who handles the mqtt libs internally.

[Shedaim]

Have you seen the issue?