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User Manual KNX/ MQTT - Coverter
Document code: MN67947_ENG Revision 1.000 Page 17 of 31
Figure 3b: “Set Communication  KNX” window
Figure 3c: “Set Communication  MQTT” window
KNX:
This section is used to define the main parameters of MQTT line. The means of the
fields are:
In the field “ Type ” the type of KNX is defined (fixed to ‘KNX TP’);
In the field “ ID Device ” the ID of the KNX side of the converter is defined.
MQTT:
This section is used to define the main parameters of MQTT line. The means of the
fields are:
In the field “ Server URL ” the URL or the IP Address of the MQTT Server is
defined;
In the field “ Server Port ” the port used for MQTT communication is defined;
In the field “
Client ID
” the Client ID of the converter is defined (if ned);
In the field “ Keep Alive (seconds) ” the delay with which the Keep Alive
message is sent on MQTT is defined;
If the field “ Clean Session ” is checked, the last MQTT messages are deleted by
the Server and the Client in case of missing ACK. If unchecked, the Server and
the Client hold the last MQTT messages and, in case of incorrect disconnection or
missing ACK, they try to send again them since all the ACK messages are
exchanged correctly (valid only for QoS 1 and QoS 2);
If the field “ Will Flag ” is checked, the converter will publish the Will topic at the
connection to the Server. With this feature, in case of incorrect disconnection,
the Server will publish this topic to all the MQTT Clients that subscribed it;
In the field “ Topic Name Will ” the topic used for Will message is defined;
In the field “ Message Will ” the payload of the Will message is defined;
In the field “
Retained Will
” the converter will send the Will message with Retain flag enabled. In this way, the Server will hold the
last Will message;
In the field “ QoS Will ” the QoS type for Will message is defined;
Im the field “ Username ” the username for the connection to the MQTT server is defined;
In the field “ Password ” the password for the connection to the MQTT server is defined;
In the field “ Send Time (seconds) ” the delay with which the MQTT messages are published is defined.