OpenBecken MQTT Connection Issue with HiveMQ Cloud Configuration

Hello, I want to use a mqtt broker external, my choice is hivemq.cloud
The interface is simple and in 3 minutes, I have an account.
I have tested publish by

mosquitto_pub -h ####.s1.eu.hivemq.cloud -p 8883 -u user -P password -t iot/atelier -m 'Hello' wrote:

and subscribe by

mosquitto_sub -h ####.s1.eu.hivemq.cloud -p 8883 -u user -P password -t iot/atelier -v wrote:

and it's correct, I have the messages by the web client of hivemq.cloud.

But by openbecken with this configuration, I have no message.

Info:MQTT:mqtt_host ####.s1.eu.hivemq.cloud is being resolved by gethostbyname Info:MQTT:mqtt_host ####.s1.eu.hivemq.cloud resolution SUCCESS Info:MQTT:mqtt_userName user mqtt_pass password mqtt_clientID iot wrote:

Port; 1883
Client Topic (Base Topic):iot
Group Topic (Secondary Topic to only receive cmnds):atelier

I don't understand, do you have an idea?

AI: Can you provide any error messages or specific behavior you see when trying to receive messages with OpenBecken?
no error in logs but disconnected in home dashboard
AI: What version of OpenBecken are you using, and how is it configured in terms of authentication and network settings?
last version

Are you really sure that you're following OBK topic names convention?
https://github.com/openshwprojects/OpenBK7231T_App/blob/main/docs/mqttTopics.md
Secondary MQTT topic is not the string after first slash, it's an alternate name for MQTT topics to address devices in groups...

Try doing publish from MQTT to OBK under:

Use command POWER, payload TOGGLE, it should toggle the relay, etc...

Thanks for your help.
I have a problem for understanding the mqtt engine of openbeken.
I have made mqtt local by mosquitto and another with hivemq.
Two accept any topic.

I think OB has two types: publish and subscribe but after many tries, I don't understand that.
I have read and searched many documentations (github, google...) or tuto but I don't find.

Someone can help me?