Divus OPTIMA KNX MQTT Module Manuel - Page 14

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3.5

M2M CONNECTION

It is possible to use the MQTT protocol to realise a bidirectional machine-to-machine communication between

several KNX Servers as long as they are all connected to the same network.

It must first be determined which KNX SERVER is to act as the "master" and the integrated MQTT broker must be

activated on it.

Then the MQTT client connections must be configured as follows:

•

On the same KNX SERVER, configure an "integrated broker" connection by selecting one of the

previously set up users.

•

On the other KNX Servers, establish a generic connection, specify the IP address of the master and

manually enter the user to be used

For each KNX SERVER, including the master, a separate user must be set up and a unique client ID assigned.

•

To control an object of another server from a KNX SERVER, proceed as follows:

•

In the KNX SERVER to be controlled, drag the object (e.g. KNX) into the Assigned Objects area, arbitrarily

deciding the topic for Command and for Report.

In other KNX Servers, create a virtual object with the same graphical representation and drag

it into the corresponding MQTT client connection by...

using as command topic the one that is responsible for the report in the other server

OPTIMA MQTT Module Manual .