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MQTTClient_connect() failure [message #1833192]

Tue, 06 October 2020 10:29

Marco Cacre

Messages: 2
Registered: October 2020

Junior Member

Hi everybody,

i'm a newbe on mqtt protocol and interfaces and this is my first post, so excuse me in advance if the question can be too trivial.
I'm facing a problem using the latest paho C library (paho-mqtt3cs) version 1.3.5.
I did and compiled a simple test on my ubuntu laptop and execute it with the mosquitto broker running on localhost.

The test is very simple, does a connection, a publish and a disconnection prior to exit.
The test run correctly but the problem appears when a try to daemonize it before to call the paho library functions, the MQTTClient_connect() fail with return code -1 when called by the child thread.

I didn't manage to understand the reason

I attached the source code of this test.

thanks a lot for any kind of help or suggestion

Marco

Attachment: test.c
(Size: 6.61KB, Downloaded 78 times)

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Re: MQTTClient_connect() failure [message #1833219 is a reply to message #1833192]

Wed, 07 October 2020 08:09

Marco Cacre

Messages: 2
Registered: October 2020

Junior Member

Sorry I answer to myself, it should be a good rule to read the documentation carefully before asking for information, I was too rushed, the problem above should be due to the use of synchronous MQTT functions.

Marco

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