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User Manual
M-Bus / M-Bus Wireless / MQTT
Document code: MN67931_ENG Revision 1.200 Page 21 of 49
Figure 3e: “Set Communication
M-Bus Wireless”
window
Figure 3f: “Set Communication
MQTT” window
M-B
US
W
IRELESS
:
This section is used to define the main parameters of M-Bus Wireless line. The means
of the fields are:
In the field “
M-Bus on Wireless
” it is possible to define if the port is present
or not;
In the field “
Mode
” the communication mode is defined;
In the field “
Radio Channel
” the radio channel is defined (only for 169 MHz).
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;
