[MQTT/SARAR4] Issue during MQTT publish

Guillaume Paquet

Hello Zephyr Community,


I am trying to use example in samples/net/mqtt_publisher.

I am on zephyr 2.0 release and I use SARA R4 driver to try this example.

I just changed prj.conf to use MQTT (not secured) on my own mosquito broker (on infomaniak server).


I don’t achieve to connect to MQTT broker and I always have following error message:

MQTT connect failed -111


Moreover, I tried to see what is send to SARA-R4 module (and what is its answer).


I can see that it loops several times on same command whereas command is ok and well understood by my SARA R4 module




+USOWR: 0,30




Do you have any idea on what can happen ?

For your information, it works when I use zephyr 1.14.1 with 1st SARA R4 driver revision.


Thanks in advance for your help


Don’t hesitate if you need more information






Guillaume  PAQUET – IoT Engineer

guillaume.paquet@...  -  02 40 18 50 91

1 Avenue Professeur Jean Rouxel – ZAC Fleuriaye

44470 CARQUEFOU – FRANCE                


Join devel@lists.zephyrproject.org to automatically receive all group messages.