MQTT example in doc fails

[ShanevanJ]

Noob question - when try this MQTT Example with new Wipy and latest firmware, it fails with this error

WiFi connection established
>MQTT ERROR! function got multiple values for argument 'user'
>ERROR! Could not connect to Pybytes!
>Pybytes configuration read from /flash/pybytes_config.json
>Connected to Wifi
>
>Traceback (most recent call last):
>  File "main.py", line 29, in <module>
>  File "/flash/lib/mqtt.py", line 28, in __init__
>OSError: [Errno 202] EAI_FAIL
>Pycom MicroPython 1.20.1.r1 [v1.11-3138a13] on 2019-10-08; WiPy with ESP32
>Pybytes Version: 1.1.3

[jirkakrepl]

Hi @ShanevanJ

I recommend using latest firmware updater tool. And then..

I would try to flash the firmware with disabled Pybytes first. (unchecked Enable Pybytes checkbox)

[ShanevanJ]

@jirkakrepl Thanks - so does this mean the example mqtt.py clashes with the internal pybytes mqtt usage ?

I did get this user app working using the umqtt simple.py and robust.py libraries and apart from the occasional

mqtt: OSError(104,)

errors - seems to work ok

I will test further and advise.

It may be useful to update the mqtt example from the docs as it wasted a whole day of head scratching to get around the issue?

[nervencid]

I have a similar problem, what is the true mqtt library ?

I dont' kno if is MQTTLib or mqtt.

Where can i find documentation about MQTTLib?

Or how i can work with mqtt, the examples here:

https://docs.pycom.io/tutorials/all/mqtt/

Are not working

[railmonitor]

@nervencid I made it work using the simple mqtt library, to connect to Azure IoT Hub without using Pybytes. Have a look at this thread:

https://forum.pycom.io/topic/5713/send-data-to-azure-iothub-with-mqtt-protocol-without-using-pybytes-solved